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Next Generation Nutrition: Genomic and Molecular Breeding Innovations for Iron and Zinc Biofortification in Rice
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作者 Kunhikrishnan Hemalatha DHANYALAKSHMI Reshma MOHAN +7 位作者 Sasmita BEHERA Uday Chand JHA Debashis MOHARANA Ahalya BEHERA Sini THOMAS Preman Rejitha SOUMYA Rameswar Prasad SAH Radha BEENA 《Rice science》 SCIE CSCD 2024年第5期526-544,I0029,I0030,共21页
Global efforts to address malnutrition and hidden hunger, particularly prevalent in low- and middle-income countries, have intensified, with a focus on enhancing the nutritional content of staple crops like rice. Desp... Global efforts to address malnutrition and hidden hunger, particularly prevalent in low- and middle-income countries, have intensified, with a focus on enhancing the nutritional content of staple crops like rice. Despite serving as a staple for over half of the world's population, rice falls short in meeting daily nutritional requirements, especially for iron(Fe) and zinc(Zn). Genetic resources, such as wild rice species and specific rice varieties, offer promising avenues for enhancing Fe and Zn content. Additionally, molecular breeding approaches have identified key genes and loci associated with Fe and Zn accumulation in rice grains. This review explores the genetic resources and molecular mechanisms underlying Fe and Zn accumulation in rice grains. The functional genomics involved in Fe uptake, transport, and distribution in rice plants have revealed key genes such as OsFRO1, OsIRT1, and OsNAS3. Similarly, genes associated with Zn uptake and translocation, including OsZIP11 and OsNRAMP1, have been identified. Transgenic approaches, leveraging transporter gene families and genome editing technologies, offer promising avenues for enhancing Fe and Zn content in rice grains. Moreover, strategies for reducing phytic acid(PA) content, a known inhibitor of mineral bioavailability, have been explored, including the identification of low-PA mutants and natural variants. The integration of genomic information, including whole-genome resequencing and pan-genome analyses, provides valuable insights into the genetic basis of micronutrient traits and facilitates targeted breeding efforts. Functional genomics studies have elucidated the molecular mechanisms underlying Fe uptake and translocation in rice. Furthermore, transgenic and genome editing techniques have shown promise in enhancing Fe and Zn content in rice grains through the manipulation of key transporter genes. Overall, the integration of multi-omics approaches holds significant promise for addressing global malnutrition and hidden hunger by enhancing the nutritional quality of rice, thereby contributing to improved food and nutritional security worldwide. 展开更多
关键词 BIOFORTIFICATION grain quality IRON phytic acid rice zinc
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Effect of Sulfur Fertilization on Productivity and Grain Zinc Yield of Rice Grown under Low and Adequate Soil Zinc Applications
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作者 Kankunlanach KHAMPUANG Nanthana CHAIWONG +3 位作者 Atilla YAZICI Baris DEMIRER Ismail CAKMAK Chanakan PROM-U-THAI 《Rice science》 SCIE CSCD 2023年第6期632-640,共9页
This study aimed to investigate the responses in rice(Oryza sativa cv.Osmancik 97)production and grain zinc(Zn)accumulation to combined Zn and sulfur(S)fertilization.The experiment was designed as a factorial experime... This study aimed to investigate the responses in rice(Oryza sativa cv.Osmancik 97)production and grain zinc(Zn)accumulation to combined Zn and sulfur(S)fertilization.The experiment was designed as a factorial experiment with two Zn and three S concentrations applied to the soil in a completely randomized design with four replications.The plants were grown under greenhouse conditions at low(0.25 mg/kg)and adequate(5 mg/kg)Zn rates combined with S(CaSO_(4)·2H_(2)O)application(low,2.5 mg/kg;moderate,10 mg/kg,and adequate,50 mg/kg).The lowest rate of S at adequate soil Zn treatment increased grain yield by 68%compared with the same S rate at low Zn supply.Plants with the adequate S rate at low Zn and adequate Zn supply produced the highest grain yield,with increases of 247%and 143%compared with low S rate at low Zn and adequate Zn supply,respectively.The concentration of grain Zn and S responded differently to the applied S rates depending on the soil Zn condition.The highest grain Zn concentration,reaching 41.5 mg/kg,was observed when adequate Zn was supplied at the low S rate.Conversely,the adequate S rate at the low soil Zn conditions yielded the highest grain S concentration.The total grain Zn uptake per plant showed particular increases in grain Zn yield when adequate S rates were applied,showing increases of 208%and 111%compared with low S rate under low and adequate soil Zn conditions,respectively.The results indicated that the synergistic application of soil Zn and S improves grain production and grain Zn yield.These results highlight the importance of total grain Zn yield in addition to grain Zn concentration,especially under the growth conditions where grain yield shows particular increases as grain Zn is diluted due to increased grain yield by increasing S fertilization. 展开更多
关键词 GRAIN rice SULFUR zinc deficiency
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Knocking-Out OsPDR7 Triggers Up-Regulation of OsZIP9 Expression and Enhances Zinc Accumulation in Rice
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作者 MENG Lu TANG Mingfeng +1 位作者 ZHU Yuxing TAN Longtao 《Rice science》 SCIE CSCD 2023年第1期36-49,共14页
Zinc(Zn) is an essential trace mineral that is required for plant growth and development. A number of protein transporters, which are involved in Zn uptake, translocation and distribution, are finely regulated to main... Zinc(Zn) is an essential trace mineral that is required for plant growth and development. A number of protein transporters, which are involved in Zn uptake, translocation and distribution, are finely regulated to maintain Zn homeostasis in plant. In this study, we functionally characterized an ATP-binding cassette(ABC) transporter gene, OsPDR7, which is involved in Zn homeostasis. Os PDR7 encodes a plasma membrane-localized protein that is expressed mainly in the exodermis and xylem in the rice root.ospdr7 mutants resulted in higher Zn accumulation compared with the wild type. Heterogeneous expression of OsPDR7 in a yeast mutant rescued the Zn-deficiency phenotype, implying transport activity of OsPDR7 to Zn in yeast. However, no ZIP genes except for OsZIP9 showed change in expression profile in the ospdr7 mutants, which suggested that OsPDR7 maintains cellular Zn homeostasis through regulating Os ZIP9 expression. RNA-Seq analysis further revealed a set of differentially expressed genes between the wild type and ospdr7 mutants that allowed us to propose a possible OsPDR7-associated signaling network involving transporters, hormone responsive genes, and transcription factors. Our results revealed a novel transporter involved in the regulation of Zn homeostasis and will pave the way toward a better understanding of the fine-tuning of gene expression in the network of transporter genes. 展开更多
关键词 OsPDR7 OsZIP9 zinc metal accumulation rice ATP-binding cassette transporter
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A Pleiotropic Drug Resistance Family Protein Gene Is Required for Rice Growth, Seed Development and Zinc Homeostasis
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作者 LI Chao LI He +1 位作者 ZHANG Xianduo YANG Zhimin 《Rice science》 SCIE CSCD 2023年第2期127-137,I0035-I0038,共15页
Zinc(Zn) is an essential mineral element for plant growth and development. Zn deficiency in crops frequently occurs in many types of soils. It is therefore crucial to identify genetic resources linking Zn acquisition ... Zinc(Zn) is an essential mineral element for plant growth and development. Zn deficiency in crops frequently occurs in many types of soils. It is therefore crucial to identify genetic resources linking Zn acquisition traits and development of crops with improved Zn-use efficiency for sustainable crop production. In this study, we functionally identified a rice uncharacterized ABCG(ATP-binding cassette G-subfamily) gene encoding a PDR20(pleiotropic drug resistance 20) metal transporter for mediation of rice growth, seed development and Zn accumulation. OsPDR20 was localized to the plasma membrane, but it was not transcriptionally induced under Zn deficiency, rather was sufficiently up-regulated under high level of Zn stress. Yeast(Saccharomyces cerevisiae) transformed with OsPDR20 displayed a relatively lower Zn accumulation with attenuated cellular growth, suggesting that OsPDR20 had an activity for Zn transport. Knocking-down OsPDR20 by RNA interference(RNAi) compromised rice growth with shorter plant height and decreased biomass in rice plantlets grown under hydroponic media. Zn concentration in the roots of OsPDR20 knocked-down rice lines declined under Zn deficiency, while they remained unchanged compared with the wild type under normal Zn supply. A rice lifelong field trial demonstrated that OsPDR20 mutation impaired the capacity of seed development, with shortened panicle and seed length, compromised spikelet fertility, and reduced grain number per plant or grain weight per unit area. Interestingly, OsPDR20 mutation elevated the accumulation of Zn in husk and brown rice over the wild type. Overall, this study pointed out that OsPDR20 is fundamentally required for rice growth and seed development through Zn transport and homeostasis. 展开更多
关键词 OsPDR20 zinc transport rice seed development ABCG53 pleiotropic drug resistance
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Regulation of Sucrose and Zinc on Root System Growth in Rice 被引量:2
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作者 张承仁 徐小利 +5 位作者 冯永永 刘乐雨 冯婷婷 陈振华 蔡凤香 赵凤云 《Agricultural Science & Technology》 CAS 2012年第1期168-172,共5页
[Objective] The aim was to study the relationship between urcrose, zinc and the root system growth in rice. [Method] Changes of root system growth, ROS generation and root system proton export ability were analyzed in... [Objective] The aim was to study the relationship between urcrose, zinc and the root system growth in rice. [Method] Changes of root system growth, ROS generation and root system proton export ability were analyzed in rice (Oryza sativa L. cv Zhonghua No.11) treated with different concentrations of Zn (NO3)3 sucrose, com- bined sucrose and Zn (NO3)3 mannitol as well as mannitol plus Zn (NO3)2. [Result] The results showed that treatment with 1-3 mM Zn(NO3)2 resulted in significant increases in total root length /number and in accumulation of H202 and 02- but decreases in root system proton export ability. With the exception of shoot length, the length of primary, adventitious, and lateral roots, and the number of adventitious, and lateral roots on primary /adventitious roots were all influenced by different concentrations of sucrose. High concentrations of sucrose caused increases in H202 and O2-, starva- tion or high concentrations of sucrose reduced root system proton export ability after treating with or without Zn. However, at the same concentration of sucrose, different changes of these indicators were observed between Zn and non-Zn treatments. The regulation of root system growth induced by sucrose was marked different from that of mannitol at the same concentration of 5%, suggesting that these effects were caused by sugar signal but not by osmotic potential. [Conclusion] This study indicat- ed that both sucrose and Zn play important roles in the regulation of rice root system growth. 展开更多
关键词 SUCROSE zinc rice root system
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Effect of Glucose on Zinc-induced Growth of Root System in Rice 被引量:2
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作者 陈振华 冯婷婷 +4 位作者 刘乐雨 徐小利 蔡凤香 冯永永 赵凤云 《Agricultural Science & Technology》 CAS 2011年第9期1334-1337,1341,共5页
[Objective] This study was aimed at exploring the effect of glucose signal on the zinc-induced growth of root system using rice as the material.[Method] The variation of root system growth,active oxygen production and... [Objective] This study was aimed at exploring the effect of glucose signal on the zinc-induced growth of root system using rice as the material.[Method] The variation of root system growth,active oxygen production and proton secretion of root systems treated with various concentrations of glucose,glucose + Zn(NO3)2,mannitol and Zn(NO3)2 + mannitol were analyzed in rice(Oryza sativa L.cv Zhonghua no.11).[Result] The results showed that the concentrations of glucose had affected the shoot height,primary root length,amount and length of lateral roots on primary roots,adventitious root length and length of lateral roots on adventitious roots in varying degrees,but not the amount of adventitious roots and lateral roots on adventitious roots under Zn+ and Zn-condition.Glucose of high concentrations induced the production of active oxygen,while lacking of glucose would lead to the decrease of proton secretion of root systems.However,there were significant differences in these indexes between under Zn+ and under Zn-condition treated with the same concentrations of glucose.The effects of glucose and mannitol with the same concentration on the growth of root systems were significantly different,indicating that the variation was resulting from sugar signal but not the osmotic potential.[Conclusion] The glucose had played important roles in the growth of rice root system both under normal condition and under Zn+ condition. 展开更多
关键词 GLUCOSE zinc rice roots
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Dry Matter Partitioning and Harvest Index Differ in Rice Genotypes with Variable Rates of Phosphorus and Zinc Nutrition 被引量:7
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作者 Amanullah Inamullah 《Rice science》 SCIE CSCD 2016年第2期78-87,共10页
Phosphorus (P) and zinc (Zn) deficiencies are the major problems that decrease crop productivity under rice-wheat cropping system. Field experiments were conducted to investigate impacts of P (0, 40, 80 and 120 k... Phosphorus (P) and zinc (Zn) deficiencies are the major problems that decrease crop productivity under rice-wheat cropping system. Field experiments were conducted to investigate impacts of P (0, 40, 80 and 120 kg/hm^2) and Zn levels (0, 5, 10 and 15 kg/hm^2) on dry matter (DM) accumulation and partitioning, and harvest index of three rice genotypes 'fine (Bamati-385) vs. coarse (F-Malakand and Pukhraj)' at various growth stages (tiliering, heading and physiological maturity). The experiments were conducted at farmers' field at Batkhela in Northwestern Pakistan for two years in summer 2011 and 2012. The two year pooled data reveled that there were no differences in percent of DM partitioning into leaves and culms with application of different P and Zn levels, and genotypes at tillering. The highest P level (120 kg/hm^2) partitioned more DM into panicles than leaves and culms at heading and physiological maturity stages. The highest Zn level (15 kg/hm^2) accumulated more DM and partitioned more DM into panicles than leaves and culms at heading and physiological maturity stages. The hybrid rice (Pukhraj) produced and partitioned more DM into panicles than F-Malakand and Bamati-385 at heading and physiological maturity stages. Higher DM accumulation and greater amounts of partitioning into panicles at heading and physiological maturity stages was noticed with increase in P and Zn levels, and the increase was significantly higher in the coarse rice genotypes than fine. We concluded that the growing hybrid rice with application of 120 kg/hm^2 P + 15 kg/hm^2 Zn not only increases total DM accumulation and partitioned greater amounts into the reproductive plant parts (panicles) but also results in higher harvest index. 展开更多
关键词 dry matter partitioning growth stage harvest index phosphorus level rice zinc level
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QTL underlying iron and zinc toxicity tolerances at seedling stage revealed by two sets of reciprocal introgression populations of rice(Oryza sativa L.) 被引量:1
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作者 Huan Liu Aijaz Soomro +6 位作者 Yajun Zhu Xianjin Qiu Kai Chen Tianqing Zheng Longwei Yang Danying Xing Jianlong Xu 《The Crop Journal》 SCIE CAS CSCD 2016年第4期280-289,共10页
Iron and zinc are two trace elements that are essential for rice. But they are toxic at higher concentrations, leading to severe rice yield losses especially in acid soils and inland valleys. In this study, two recipr... Iron and zinc are two trace elements that are essential for rice. But they are toxic at higher concentrations, leading to severe rice yield losses especially in acid soils and inland valleys. In this study, two reciprocal introgression line(IL) populations sharing the same parents were used with high-density SNP bin markers to identify QTL tolerant to iron and zinc toxicities. The results indicated that the japonica variety 02,428 had stronger tolerance to iron and zinc toxicities than the indica variety Minghui 63. Nine and ten QTL contributing to iron and zinc toxicity tolerances,respectively, were identified in the two IL populations. The favorable alleles of most QTL came from 02,428. Among them, q FRRDW2, q ZRRDW3, and q FRSDW11 appeared to be independent of genetic background. The region C11S49–C11S60 on chromosome 11 harbored QTL affecting multiple iron and zinc toxicity tolerance-related traits, indicating partial genetic overlap between the two toxicity tolerances. Our results provide essential information and materials for developing excellent rice cultivars with iron and/or zinc tolerance by marker-assisted selection(MAS). 展开更多
关键词 rice Reciprocal INTROGRESSION lines IRON TOLERANCE zinc TOLERANCE Quantitative trait locus/loci(QTL)
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Sufficiency and Deficiency Indices of Soil Available Zinc for Rice in the Alluvial Soil of the Coastal Yellow Sea 被引量:1
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作者 WEI Yi chang BAI You lu +6 位作者 JIN Ji yun YANG Li ping YAO Zheng XU Si xin Luo Guo an SONG Wei ZHU Chun mei 《Rice science》 SCIE 2007年第3期223-228,共6页
To determine the sufficiency and deficiency indices of soil available Zn by the Agro Services International (ASI) method (ASI-Zn) for Zn fertilizer recommendation in rice production in the alluvial soil of the coa... To determine the sufficiency and deficiency indices of soil available Zn by the Agro Services International (ASI) method (ASI-Zn) for Zn fertilizer recommendation in rice production in the alluvial soil of the coastal Yellow Sea, the relationship between relative rice yield and soil available ASI-Zn concentration was analyzed from a ten-field experiment with various soil test classes ranging from low to high fertility in 2005 and 2006, and nine Zn fertilizer application rates (0, 7.5 15, 22.5, 30, 37.5, 45, 52.5 and 60 kg Zn/ha) arranged at random with three replications in each field. There was a significant quadratic relationship between soil available ASI-Zn and rice yield, and a significant linear relationship between soil available ASI-Zn concentration and Zn fertilization rate. For rice variety Wuyujing 3, soil available ASI-Zn was deficient when the value was at lower than 1 mg Zn/L, low at 1 to 2 mg Zn/L, sufficient at 1 to 2 mg Zn/L, excessive at higher than 7.5 mg Zn/L. Thus, Zn fertilizer recommendation could be done according to the sufficiency and deficiency indices of soil ASI-Zn. For most of alluvial soils of the coastal Yellow Sea in the study, the available ASI-Zn was lower than 1 mg Zn/L, and then the optimum application rate of Zn fertilizer was about 20 kg Zn/ha. 展开更多
关键词 Agro Services International method coastal alluvial soil rice soil available zinc sufficiency index deficiency index fertilizer recommendation yield
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Improve Anthocyanin and Zinc Concentration in Purple Rice by Nitrogen and Zinc Fertilizer Application
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作者 Suchila UTASEE Sansanee JAMJOD +1 位作者 Sittisavet LORDKAEW Chanakan PROM-U-THAI 《Rice science》 SCIE CSCD 2022年第5期435-450,共16页
Zinc(Zn)is an essential micronutrient for plant growth and development,and anthocyanin is a secondary metabolite compound generally produced under stress conditions;both have benefits to human health.Rice is a staple ... Zinc(Zn)is an essential micronutrient for plant growth and development,and anthocyanin is a secondary metabolite compound generally produced under stress conditions;both have benefits to human health.Rice is a staple food crop for most of the world’s population,and purple rice is well known as a natural source of Zn and anthocyanins,but their stability depends upon many factors.This review focuses on the opportunity to increase Zn and anthocyanin compounds in purple rice grains via Zn and nitrogen(N)management during cultivation.Variation in grain Zn concentration and anthocyanin compounds is found among purple rice varieties,thus presenting a challenge for breeding programs aiming at high grain Zn and anthocyanin contents.Genetic engineering has successfully achieved a high-efficiency vector system comprising two regulatory genes and six structural anthocyanin-related genes driven by endosperm-specific promoters to engineer purple endosperm rice that can provide new high-anthocyanin varieties.Grain Zn and anthocyanin concentrations in rice can also be affected by environmental factors during cultivation,e.g.,light,temperature,soil salinity and nutrient(fertilizer)management.Applying N and Zn fertilizer is found to influence the physiological mechanisms of Zn absorption,uptake,transport and remobilization to promote grain Zn accumulation in rice,while N application can improve anthocyanin synthesis by promoting its biosynthesis pathway via the use of phenylalanine as a precursor.In summary,there is an opportunity to improve both grain Zn and anthocyanin in purple rice by appropriate management of Zn and N fertilizers during cultivation for specific varieties. 展开更多
关键词 purple rice ANTHOCYANIN secondary metabolite zinc deficiency FERTILIZER
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Novel Sources of aus Rice for Zinc Deficiency Tolerance Identified Through Association Analysis Using High-Density SNP Array
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作者 Jae-Sung LEE Matthias WISSUWA +1 位作者 Oscar B. ZAMORA Abdelbagi M. ISMAIL 《Rice science》 SCIE CSCD 2018年第5期293-300,共8页
Zinc (Zn) deficiency is a major soil constraint limiting rice crop growth and yield, yet the genetic control of tolerance mechanisms is still poorly understood. Here, we presented promising loci and candidate genes ... Zinc (Zn) deficiency is a major soil constraint limiting rice crop growth and yield, yet the genetic control of tolerance mechanisms is still poorly understood. Here, we presented promising loci and candidate genes conferring tolerance to Zn deficiency and identified through association analysis using a 365 K single nucleotide polymorphism (SNP) marker array in a diverse aus (semi-wild type rice) panel. Tolerant accessions exhibited higher growth rate with relatively rare stress symptoms. Two loci on chromosomes 7 and 9 were strongly associated with plant vigor under Zn deficiency at a peak-stress stage. Based on previous microarray data from the same experimental plots, we highlighted four candidate genes whose expressions were accompanied by significant genotype and/or environment effects under Zn deficiency. Network-gene ontology supported known tolerance mechanisms, such as ascorbic acid pathway, and also suggested the importance of photosynthesis genes to overcome Zn deficiency symptoms. 展开更多
关键词 aus genome-wide association study zinc deficiency rice
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Identification of Potential Zinc Deficiency Responsive Genes and Regulatory Pathways in Rice by Weighted Gene Co-expression Network Analysis
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作者 Blaise Pascal MUVUNYI LU Xiang +2 位作者 ZHAN Junhui HE Sang YE Guoyou 《Rice science》 SCIE CSCD 2022年第6期545-558,共14页
Zinc(Zn)malnutrition is a major public health issue.Genetic biofortification of Zn in rice grain can alleviate global Zn malnutrition.Therefore,elucidating the genetic mechanisms regulating Zn deprivation response in ... Zinc(Zn)malnutrition is a major public health issue.Genetic biofortification of Zn in rice grain can alleviate global Zn malnutrition.Therefore,elucidating the genetic mechanisms regulating Zn deprivation response in rice is essential to identify elite genes useful for breeding high grain Zn rice varieties.Here,a meta-analysis of previous RNA-Seq studies involving Zn deficient conditions was conducted using the weighted gene co-expression network analysis(WGCNA)and other in silico prediction tools to identify modules(denoting cluster of genes with related expression pattern)of co-expressed genes,modular genes which are conserved differentially expressed genes(DEGs)across independent RNA-Seq studies,and the molecular pathways of the conserved modular DEGs.WGCNA identified 16 modules of co-expressed genes.Twenty-eight and five modular DEGs were conserved in leaf and crown,and root tissues across two independent RNA-Seq studies.Functional enrichment analysis showed that 24 of the 28 conserved modular DEGs from leaf and crown tissues significantly up-regulated 2 Kyoto Encyclopedia of Genes and Genomes(KEGG)pathways and 15 Gene Ontology(GO)terms,including the substrate-specific transmembrane transporter and the small molecule metabolic process.Further,the well-studied transcription factors(OsWOX11 and OsbHLH120),protein kinase(OsCDPK20 and OsMPK17),and miRNAs(OSA-MIR397A and OSA-MIR397B)were predicted to target some of the identified conserved modular DEGs.Out of the 24 conserved and up-regulated modular DEGs,19 were yet to be experimentally validated as Zn deficiency responsive genes.Findings from this study provide a comprehensive insight on the molecular mechanisms of Zn deficiency response and may facilitate gene and pathway prioritization for improving Zn use efficiency and Zn biofortification in rice. 展开更多
关键词 rice BIOFORTIFICATION zinc deficiency gene expression weighted gene co-expression network analysis
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Effects of Zinc Oxide Particles with Different Sizes on Root Development in Oryza sativa
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作者 Monica RUFFINI CASTIGLIONE Stefania BOTTEGA +1 位作者 Carlo SORCE Carmelina SPANÒ 《Rice science》 SCIE CSCD 2023年第5期449-458,I0021,共11页
Given the consistent release of zinc oxide(ZnO)nanoparticles into the environment,it is urgent to study their impact on plants in depth.In this study,grains of rice were treated with two different concentrations of Zn... Given the consistent release of zinc oxide(ZnO)nanoparticles into the environment,it is urgent to study their impact on plants in depth.In this study,grains of rice were treated with two different concentrations of ZnO nanoparticles(NP-ZnO,10 and 100 mg/L),and their bulk counterpart(B-ZnO)were used to evaluate whether ZnO action could depend on particle size.To test this hypothesis,root growth and development assessment,oxidative stress parameters,indole-3-acetic acid(IAA)content and molecules/enzymes involved in IAA metabolism were analyzed.In situ localization of Zn in control and treated roots was also performed.Though Zn was visible inside root cells only following nanoparticle treatment,both materials(NP-ZnO and B-ZnO)were able to affect seedling growth and root morphology,with alteration in the concentration/pattern of localization of oxidative stress markers and with a different action depending on particle size.In addition,only ZnO supplied as bulk material induced a significant increase in both IAA concentration and lateral root density,supporting our hypothesis that bulk particles might enhance lateral root development through the rise of IAA concentration.Apparently,IAA concentration was influenced more by the activity of the catabolic peroxidases than by the protective action of phenols. 展开更多
关键词 zinc oxide indole-3-acetic acid lateral root rice bulk particle NANOPARTICLE
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典型铅锌矿区周边土壤-稻米重金属污染特征及健康风险评价 被引量:1
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作者 符露 秦俊虎 +1 位作者 贾亚琪 高庚申 《地球与环境》 CAS CSCD 北大核心 2024年第1期112-121,共10页
为了掌握黔西北典型铅锌矿区周边稻田土壤重金属污染状况,分别采集98个土壤样品和稻米样品,运用单因子污染指数法、内梅罗综合污染指数法和潜在生态危害指数法对研究区稻田土壤中八种重金属(Cr、Ni、Cu、Zn、Cd、Pb、Hg、As)进行污染特... 为了掌握黔西北典型铅锌矿区周边稻田土壤重金属污染状况,分别采集98个土壤样品和稻米样品,运用单因子污染指数法、内梅罗综合污染指数法和潜在生态危害指数法对研究区稻田土壤中八种重金属(Cr、Ni、Cu、Zn、Cd、Pb、Hg、As)进行污染特征分析和风险评价,并采用健康风险评估模型对研究区稻米进行健康风险评价。结果表明:研究区稻田土壤受到重金属不同程度污染,整体处于中度污染水平(P_(N)=2.61),但Cu为重度污染(P_(Cu)=3.13);土壤生态风险总体处于中等水平(RI=279),最主要生态风险因子为Hg,其生态风险危害程度为很强(E_(Hg)=179);研究区稻米中重金属平均含量未超标,但有部分点位样品重金属含量超标;食用研究区种植的稻米不会对成人和儿童引起单一重金属健康风险,但长期食用,多种重金属复合污染会对成人和儿童健康产生负面影响(THQ_(成人)=2.41,THQ_(儿童)=2.48)。 展开更多
关键词 铅锌矿区 土壤 稻米 重金属污染 生态风险 健康风险
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不同水稻品种和施锌方式对水稻产量及籽粒锌有效性的影响
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作者 苏素苗 康天恺 +4 位作者 邹家龙 汪本福 张洋洋 廖世鹏 李小坤 《中国农业科学》 CAS CSCD 北大核心 2024年第15期3023-3034,共12页
【目的】明确不同水稻品种对锌肥的响应效果以及锌肥不同施用方式对水稻产量及籽粒锌有效性的影响差异。【方法】分别于2019和2020年进行田间试验。具体如下:2019年开展第1个田间试验,旨在探究不同水稻品种对施用锌肥的响应效果。选取... 【目的】明确不同水稻品种对锌肥的响应效果以及锌肥不同施用方式对水稻产量及籽粒锌有效性的影响差异。【方法】分别于2019和2020年进行田间试验。具体如下:2019年开展第1个田间试验,旨在探究不同水稻品种对施用锌肥的响应效果。选取了虾稻一号、虾稻二号、润香玉和隆两优3463等4个水稻品种,设置不施锌(CK)和施锌(+Zn)两个处理,以探究不同水稻品种对施用锌肥响应效果的差异。2020年开展第2个田间试验,旨在探究锌肥不同施用方式对水稻产量及籽粒锌有效性的影响。在2019年试验基础上,选择虾稻一号和隆两优3463两个产量较高的水稻品种继续开展后续研究,设置不施锌(S0F0)、土壤施锌15 kg·hm^(-2)(S1F0)、土壤施锌30 kg·hm^(-2)(S2F0)、开花期叶面喷施0.5%ZnSO_(4)(S0F1)、土壤施锌15 kg·hm^(-2)+开花期喷施0.5%ZnSO_(4)(S1F1)、土壤施锌30 kg·hm^(-2)+开花期喷施0.5%ZnSO_(4)(S2F1)6个处理,以探究不同施锌方式对两种水稻产量及籽粒锌有效性的影响差异。【结果】试验1中,不同品种水稻对施用锌肥的响应程度存在显著差异。施锌后,虾稻一号、虾稻二号、润香玉和隆两优3463等4个水稻品种的产量分别增加4.4%、11.6%、7.9%和4.8%,其增产效果主要表现为有效穗数和结实率的提高。与CK相比,4个水稻品种施锌处理的有效穗数分别平均增加了19.8%、3.9%、9.9%和24.0%,结实率分别平均增加了5.4%、9.7%、6.7%和4.0%。此外,4个水稻品种施锌处理的糙米植酸与锌摩尔比分别平均降低了24.3%、30.9%、21.3%和37.2%,精米植酸与锌摩尔比分别平均降低了29.5%、32.4%、33.9%和35.3%。试验2中,不同施锌方式对虾稻一号和隆两优3463产量和籽粒锌有效性的影响效果存在显著差异。土壤施锌的增产效果显著优于叶面喷锌,且在土壤施锌的基础上配合叶面喷锌可进一步提高水稻产量。与S0F0相比,S0F1、S1F0、S1F1、S2F0和S2F1处理的虾稻一号产量分别提高了12.1%、14.1%、17.2%、22.2%和29.3%,隆两优3463的产量分别提高了2.0%、10.1%、15.2%、28.3%和31.3%。不同施锌方式对籽粒锌有效性的影响效果有所不同,且两个水稻品种的籽粒锌有效性存在显著差异。叶面喷施对籽粒的锌强化效果明显优于土壤施用,隆两优3463籽粒锌的生物有效性高于虾稻一号。【结论】筛选高产富锌的水稻品种(隆两优3463),并采用合理的锌肥施用方式(土施30 kg·hm^(-2)+开花期叶面喷施0.5%ZnSO_(4)),可实现水稻增产和稻米锌营养强化的目的,助力水稻增收提质。 展开更多
关键词 水稻品种 锌肥 施用方式 产量 籽粒锌有效性 锌营养强化
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水稻低亲和性阳离子转运蛋白基因OsLCT3的克隆与功能研究
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作者 李兴容 谭志兵 +3 位作者 赵燕 李曜魁 赵炳然 唐丽 《生物技术通报》 CAS CSCD 北大核心 2024年第4期97-109,共13页
【目的】部分稻米镉超标严重影响我国粮食质量安全,本研究旨在鉴定对稻米镉积累有调控作用的基因,为阻控稻米镉积累提供新的基因资源。【方法】通过逆转录PCR和RACE技术,克隆了水稻低亲和性阳离子转运蛋白基因家族的一个新成员OsLCT3。... 【目的】部分稻米镉超标严重影响我国粮食质量安全,本研究旨在鉴定对稻米镉积累有调控作用的基因,为阻控稻米镉积累提供新的基因资源。【方法】通过逆转录PCR和RACE技术,克隆了水稻低亲和性阳离子转运蛋白基因家族的一个新成员OsLCT3。通过生物信息学方法对OsLCT3的自然变异进行分析,对OsLCT3蛋白的理化性质进行预测;利用实时荧光定量PCR分析其全生育期表达模式及对镉、锰、铁胁迫的响应;采用融合报告基因定位法探究OsLCT3的亚细胞定位。通过苗期镉胁迫水培以及镉污染土壤的成熟期植株各部位的镉及二价矿质金属元素测定,分析敲除OsLCT3对水稻二价阳离子运输的影响。此外,通过酵母细胞的异源功能互补验证OsLCT3对酵母镉耐受性的影响。【结果】OsLCT3仅存在于部分水稻品种中,编码区全长1263 bp,根据编码区变异其氨基酸序列可划分为5个单倍型,编码的蛋白具有12个跨膜结构域,与小麦、节节麦的LCT亲缘关系较近,与水稻OsLCT_(2)的同源性仅52%,与籼稻、粳稻两个亚种OsLCT_(1)的同源性分别为49%、47%。OsLCT3在生长发育的各时期均在根部高表达,在扬花期的表达最高,且在根部的表达受镉胁迫及过量铁、锰的抑制,蛋白定位于质膜。与野生型相比,oslct3敲除系苗期株高降低,地上部的镉、铁、锌含量降低,根部铁含量升高,其他元素含量不变;根部镉、铁、锌向地上部的转运率降低。大田条件下,oslct3敲除系成熟期的茎叶和糙米镉含量较野生型均显著下降,稻草和糙米锰、铜、铁、锌含量较对照无显著差异。表达OsLCT3导致酵母对镉胁迫更敏感。【结论】OsLCT3参与根部的镉、铁、锌向地上部的运输,正调控稻米镉积累。 展开更多
关键词 水稻 OsLCT3 镉转运 铁转运 锌转运 金属转运蛋白
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氮肥运筹与硅锌肥配施对虾稻1号产量和品质的影响
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作者 聂新星 陈晨 +5 位作者 张敏敏 段小丽 洪俊 周雷 曹文 杨利 《中国稻米》 北大核心 2024年第2期98-101,共4页
为探讨优质食味籼稻虾稻1号产量和品质协同提升栽培技术,在施氮量180 kg/hm^(2)水平下,研究3种基肥∶分蘖肥∶穗肥运筹比例(7∶3∶0、5∶3∶2和3∶3∶4,分别记作N_(7+3+0)、N_(5+3+2)和N_(3+3+4))并配施硅锌肥处理对虾稻1号产量和品质... 为探讨优质食味籼稻虾稻1号产量和品质协同提升栽培技术,在施氮量180 kg/hm^(2)水平下,研究3种基肥∶分蘖肥∶穗肥运筹比例(7∶3∶0、5∶3∶2和3∶3∶4,分别记作N_(7+3+0)、N_(5+3+2)和N_(3+3+4))并配施硅锌肥处理对虾稻1号产量和品质的影响。结果表明,不同处理下虾稻1号产量整体表现为N_(7+3+0)<N_(5+3+2)≈N_(3+3+4)。提高氮肥在穗肥中的比例,虾稻1号糙米率、精米率和整精米率呈先增加后降低趋势,而胶稠度和蛋白质含量呈上升趋势。其中,氮肥运筹对整精米率的影响达到显著水平,对蛋白质含量的影响达到极显著水平。相同氮肥运筹方式下,配施硅肥或硅锌肥均表现出一定的增产效应,但对稻米品质指标的影响均未达到显著水平。综上所述,N_(5+3+2)运筹方式可实现虾稻1号产量与品质的协同提升,而配施硅锌肥有助于其产量进一步提升。 展开更多
关键词 水稻 氮肥运筹 硅肥 锌肥 虾稻1号 产量 品质
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Physiological and Biochemical Responses of Rice Root to La^(3+),Ce^(3+) and Zn^(2+) Stress 被引量:1
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作者 林有升 丁钟峰 +3 位作者 李盼 赵德强 李佳凯 王学 《Agricultural Science & Technology》 CAS 2012年第1期17-20,107,共5页
[Objective] This study aimed to investigate the physiological and biochemi- cal effects of lanthanum (La3+), cerium (Ce3+), zinc (Zn2+) on rice roots and explore the environmental effects of excessive applica... [Objective] This study aimed to investigate the physiological and biochemi- cal effects of lanthanum (La3+), cerium (Ce3+), zinc (Zn2+) on rice roots and explore the environmental effects of excessive application of rare earth. [Method] By using rare earth elements La3+ and Ce3+, and nutritional and toxic heavy metal element Zn2+ as stress factors, the effects of these three elements on the germination of rice seeds, growth and development of seedlings were studied and compared by using tissue culture method. [Result] La3+, Ce3+ and Zn2+ had no significant effect on germi- nation rate of rice seeds but significant inhibition effects on the growth of roots and shoots of rice seedlings, and the inhibition effects of rare earth elements in high concentrations were stronger than Zn2+; the content of soluble protein in rice roots showed a rising-decreasing trend with the increasing concentrations of three metal ions, La3+ and Ce3+ were more sensitive than Zn2+; the activities of CAT and POD increased with the increasing concentrations of La3. and Ce3+, while the SOD activity had shown the tendency of decreased first and increased later; the three metal ions all could significantly stimulate the rapid accumulation of MDA in rice roots. La3+ and Ce3+ had stronger toxic effects at high concentrations than Zn2+, [Conclusion] Toxic mechanism of rare earth elements La+ and Ce3. is similar to that of heavy metal el- ement Zn2+. Rare earth might become a new type of pollution in the long run. 展开更多
关键词 CERIUM LANTHANUM zinc STRESS rice
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锌肥对水稻生长·产量和养分吸收的影响
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作者 李若清 袁嫚嫚 孙义祥 《安徽农业科学》 CAS 2024年第21期134-136,162,共4页
为探索皖江流域水稻生长发育与营养特性对锌肥的响应,在安徽省宣城市设置不施肥(CK)、农民习惯施肥(FFP)、在农民习惯施肥的基础上分别施锌肥(ZnSO_(4)·7H_(2)O)20和40 kg/hm^(2)(FFP+Zn20和FFP+Zn40)4个处理的水稻田间小区试验,... 为探索皖江流域水稻生长发育与营养特性对锌肥的响应,在安徽省宣城市设置不施肥(CK)、农民习惯施肥(FFP)、在农民习惯施肥的基础上分别施锌肥(ZnSO_(4)·7H_(2)O)20和40 kg/hm^(2)(FFP+Zn20和FFP+Zn40)4个处理的水稻田间小区试验,研究锌肥对水稻生长、产量和养分吸收的影响。结果表明,与FFP相比,FFP+Zn20和FFP+Zn40增加了水稻千粒重和结实率,其中FFP+Zn40水稻千粒重和结实率的增幅达到显著水平(P<0.05);FFP+Zn40显著增加了水稻产量和净收益,增幅分别为14.5%和15.6%。氮锌配施,有利于水稻成熟期叶、茎鞘和穗的氮、锌含量的增加,其中FFP+Zn40的增幅最高。增施锌肥有利于该区域水稻增产增收和提质,施用N、P_(2)O_(5)、K_(2)O各164、54、126 kg/hm^(2),配合基肥土施锌肥40 kg/hm^(2)的效果最优。 展开更多
关键词 锌肥 水稻 产量 锌吸收 经济效益
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兼顾江汉平原水稻产量和品质提高的优化施锌量研究
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作者 刘越 周梦 +7 位作者 罗海伟 党程成 郝蓉蓉 胡玉婷 严鹏 陈龙周 刘洋旋 田小海 《河南农业科学》 北大核心 2024年第3期43-52,共10页
在大田条件下,以4个水稻品种(立香85、象牙香占、合两优927、昌两优8号)为试验材料,通过基施锌肥研究不同施锌量[0 kg/hm^(2)(CK)、7.5 kg/hm^(2)(Zn1)、15 kg/hm^(2)(Zn2)、30 kg/hm^(2)(Zn3)]下水稻产量、品质的变化,为江汉平原优质... 在大田条件下,以4个水稻品种(立香85、象牙香占、合两优927、昌两优8号)为试验材料,通过基施锌肥研究不同施锌量[0 kg/hm^(2)(CK)、7.5 kg/hm^(2)(Zn1)、15 kg/hm^(2)(Zn2)、30 kg/hm^(2)(Zn3)]下水稻产量、品质的变化,为江汉平原优质稻锌肥施用提供理论依据。结果表明,施锌可以显著提高水稻产量,且水稻产量随着施锌量的增加呈先上升后降低的趋势,总体上以Zn2处理最高,Zn1处理次之。立香85、合两优927、昌两优8号以Zn2处理产量最高;象牙香占以Zn1处理产量最高,Zn2处理次之。施锌处理产量较CK增加了8.1%~28.8%。施锌对稻米加工品质有明显的改善作用,整体以Zn1和Zn2处理下糙米率、精米率、整精米率较高。不同施锌处理下直链淀粉含量因品种而异,其中,立香85以Zn1处理最高,昌两优8号以Zn2处理最高,象牙香占和合两优927以Zn3处理最高。对于淀粉RVA谱特征值,立香85、象牙香占、昌两优8号均以Zn1处理崩解值最高;消减值表现为立香85和合两优927在CK下最低,象牙香占和昌两优8号在Zn1处理下最低。各品种粗蛋白含量随施锌量的增加呈先升高后降低的趋势,其中,立香85、合两优927均以Zn1处理粗蛋白含量最高,象牙香占和昌两优8号均以Zn2处理粗蛋白含量最高。总体上,清蛋白、球蛋白和醇溶蛋白含量均以Zn2处理最高,谷蛋白含量以Zn1处理最高。糙米、精米锌含量也随着施锌量的增加呈现先增加后降低的趋势。其中,立香85、合两优927均以Zn1处理糙米锌含量最高,分别为23.1、19.8 mg/kg;象牙香占和昌两优8号均以Zn2处理最高,分别为20.0、17.7mg/kg。各品种糙米锌含量均大于精米锌含量。综合水稻产量、品质等多方面因素来看,江汉平原施锌处理以Zn1—Zn2为优,施锌量为7.5~15 kg/hm^(2)。 展开更多
关键词 水稻 锌肥 产量 品质 锌含量
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