The enzyme myo-inositol-1-phosphate synthase(MIPS EC 5.5.1.4) catalyzes the first step of myo-inositol biosynthesis, a product that plays crucial roles in plants as an osmoprotectant, transduction molecule, cell wall ...The enzyme myo-inositol-1-phosphate synthase(MIPS EC 5.5.1.4) catalyzes the first step of myo-inositol biosynthesis, a product that plays crucial roles in plants as an osmoprotectant, transduction molecule, cell wall constituent and production of stress related molecule. Previous reports highlighted an important role of MIPS family genes in abiotic stresses particularly under salt stress tolerance in several plant species; however, little is known about the cellular and physiological functions of MIPS2 genes under abiotic conditions. In this study, a novel salt stress responsive gene designated Gs MIPS2 from wild soybean Glycine soja 07256 was functionally characterized contained an open reading frame(ORF) of 1 533 bp coding a peptide sequence of 510 amino acids along with mass of 56 445 ku. Multiple sequence alignment analysis revealed its 92%-99% similarity with other MIPS family members in legume proteins. Quantitative real-time PCR results demonstrated that Gs MIPS2 was induced by salt stress and expressed in roots of soybean. The positive function of Gs MIPS2 under salt response at different growth stages of transgenic Arabidopsis was also elucidated. The results showed that Gs MIPS2 transgenic lines displayed increased tolerance as compared to WT and atmips2 mutant lines under salt stress. Furthermore, the expression levels of some salt stress responsive marker genes, including KIN1, RD29 A, RD29 B, P5 Cs and COR47 were significantly up-regulated in Gs MIPS2 overexpression lines than wild type and atmips2 mutant. Collectively, these results suggested that Gs MIPS2 gene was a positive regulator of plant tolerance to salt stress. This was the first report to demonstrate that overexpression of Gs MIPS2 gene from wild soybean improved salt tolerance in transgenic Arabidopsis.展开更多
Trehalose synthase is an important functional enzyme in the synthesis of trehalose in organisms and also participates in plant stress-resistant physiological processes.The transcriptomic study showed that a trehalose-...Trehalose synthase is an important functional enzyme in the synthesis of trehalose in organisms and also participates in plant stress-resistant physiological processes.The transcriptomic study showed that a trehalose-6-phosphate synthase gene was responsive to salt and alkaline stresses in Glycine soja.To dissect the molecular mechanisms of this enzyme in plant responses to stresses,the PCR technique was used to clone a trehalose-6-phosphate synthase gene from Glycine soja and it was designated as the GsTPS9.The full-length cDNA of this gene was 2583bp which encoded 861 amino acids.The sequence and structure analyses indicated that the GsTPS9 had high homology with Glycine max GmTPS9.The qRT-PCR analysis revealed that the GsTPS9 gene was expressed in Glycine soja roots,stems and leaves,and the highest expression level was in roots;the GsTPS9 gene had different responses under the stresses of NaCl,NaHCO_(3),PEG6000,ABA,MeJA and SA.This study laid the foundation for revealing the mechanism of the TPS in plant signal transduction pathways.展开更多
Genetic diversity is a cornerstone of crop improvement,However,cultivated soybean(Glycine max)has undergone several genetic bottlenecks,including domestication in China,the introduction of landraces to other areas of ...Genetic diversity is a cornerstone of crop improvement,However,cultivated soybean(Glycine max)has undergone several genetic bottlenecks,including domestication in China,the introduction of landraces to other areas of the world and,latterly,selective breeding,leading to low genetic diversity the poses a major obstacle to soybean improvement.By contrast,there remains a relatively high level of genetic diversity in soybean's wild relatives,especially the perennial soybeans(Glycine subgenus Glycine),which could serve as potential gene pools for improving soybean cultivars.Wild soybeans are phylogenetically diversified and adapted to various habitats,harboring resistance to various biotic and abiotic stresses.Advances in genome and transcriptome sequencing enable alleles associated with desirable traits that were lost during domestication of soybean to be discovered in wild soybean.The collection and conservation of soybean wild relatives and the dissection of their genomic features will accelerate soybean breeding and facilitate sustainable agriculture and food production.展开更多
Soybean (Glycine max), an important domesticated species originated in China, constitutes a major source ofedible oils and high-quality plant proteins worldwide. In spite of its complex genome as a consequence of an a...Soybean (Glycine max), an important domesticated species originated in China, constitutes a major source ofedible oils and high-quality plant proteins worldwide. In spite of its complex genome as a consequence of an ancienttetraploidilization, platforms for map-based genomics, sequence-based genomics, comparative genomics and functionalgenomics have been well developed in the last decade, thus rich repertoires of genomic tools and resources are available,which have been influencing the soybean genetic improvement. Here we mainly review the progresses of soybean(including its wild relative Glycine soja) genomics and its impetus for soybean breeding, and raise the major biologicalquestions needing to be addressed. Genetic maps, physical maps, QTL and EST mapping have been so well achievedthat the marker assisted selection and positional cloning in soybean is feasible and even routine. Whole genomesequencing and transcriptomic analyses provide a large collection of molecular markers and predicted genes, which areinstrumental to comparative genomics and functional genomics. Comparative genomics has started to reveal theevolution of soybean genome and the molecular basis of soybean domestication process. Microarrays resources,mutagenesis and efficient transformation systems become essential components of soybean functional genomics.Furthermore, phenotypic functional genomics via both forward and reverse genetic approaches has inferred functionsof many genes involved in plant and seed development, in response to abiotic stresses, functioning in plant-pathogenicmicrobe interactions, and controlling the oil and protein content of seed. These achievements have paved the way forgeneration of transgenic or genetically modified (GM) soybean crops.展开更多
基金Supported by "863" Project(2008AA10Z153)the National Natural Science Foundation of China(31171578)+1 种基金Heilongjiang Provincial Higher School Science and Technology Innovation Team Building Program(2011TD005)the National Basic Scientific Talent Training Fund Projects(J1210069)
文摘The enzyme myo-inositol-1-phosphate synthase(MIPS EC 5.5.1.4) catalyzes the first step of myo-inositol biosynthesis, a product that plays crucial roles in plants as an osmoprotectant, transduction molecule, cell wall constituent and production of stress related molecule. Previous reports highlighted an important role of MIPS family genes in abiotic stresses particularly under salt stress tolerance in several plant species; however, little is known about the cellular and physiological functions of MIPS2 genes under abiotic conditions. In this study, a novel salt stress responsive gene designated Gs MIPS2 from wild soybean Glycine soja 07256 was functionally characterized contained an open reading frame(ORF) of 1 533 bp coding a peptide sequence of 510 amino acids along with mass of 56 445 ku. Multiple sequence alignment analysis revealed its 92%-99% similarity with other MIPS family members in legume proteins. Quantitative real-time PCR results demonstrated that Gs MIPS2 was induced by salt stress and expressed in roots of soybean. The positive function of Gs MIPS2 under salt response at different growth stages of transgenic Arabidopsis was also elucidated. The results showed that Gs MIPS2 transgenic lines displayed increased tolerance as compared to WT and atmips2 mutant lines under salt stress. Furthermore, the expression levels of some salt stress responsive marker genes, including KIN1, RD29 A, RD29 B, P5 Cs and COR47 were significantly up-regulated in Gs MIPS2 overexpression lines than wild type and atmips2 mutant. Collectively, these results suggested that Gs MIPS2 gene was a positive regulator of plant tolerance to salt stress. This was the first report to demonstrate that overexpression of Gs MIPS2 gene from wild soybean improved salt tolerance in transgenic Arabidopsis.
基金Supported by the National Natural Science Foundation of China(31670272)Heilongjiang Provincial Natural Science Foundation(C2017014)。
文摘Trehalose synthase is an important functional enzyme in the synthesis of trehalose in organisms and also participates in plant stress-resistant physiological processes.The transcriptomic study showed that a trehalose-6-phosphate synthase gene was responsive to salt and alkaline stresses in Glycine soja.To dissect the molecular mechanisms of this enzyme in plant responses to stresses,the PCR technique was used to clone a trehalose-6-phosphate synthase gene from Glycine soja and it was designated as the GsTPS9.The full-length cDNA of this gene was 2583bp which encoded 861 amino acids.The sequence and structure analyses indicated that the GsTPS9 had high homology with Glycine max GmTPS9.The qRT-PCR analysis revealed that the GsTPS9 gene was expressed in Glycine soja roots,stems and leaves,and the highest expression level was in roots;the GsTPS9 gene had different responses under the stresses of NaCl,NaHCO_(3),PEG6000,ABA,MeJA and SA.This study laid the foundation for revealing the mechanism of the TPS in plant signal transduction pathways.
基金supported by the National Key Research and Development Program(grant no.2021YFF1001203)the Taishan Scholars Program of Shandong Province(tsqn201812036)+1 种基金the Agricultural Variety Improvement Project of Shandong Province(2019LZGC004)Program for Scientific Research Innovation Team of Young Scholar in Colleges and Universities of Shandong Province,China(2020KJF008)。
文摘Genetic diversity is a cornerstone of crop improvement,However,cultivated soybean(Glycine max)has undergone several genetic bottlenecks,including domestication in China,the introduction of landraces to other areas of the world and,latterly,selective breeding,leading to low genetic diversity the poses a major obstacle to soybean improvement.By contrast,there remains a relatively high level of genetic diversity in soybean's wild relatives,especially the perennial soybeans(Glycine subgenus Glycine),which could serve as potential gene pools for improving soybean cultivars.Wild soybeans are phylogenetically diversified and adapted to various habitats,harboring resistance to various biotic and abiotic stresses.Advances in genome and transcriptome sequencing enable alleles associated with desirable traits that were lost during domestication of soybean to be discovered in wild soybean.The collection and conservation of soybean wild relatives and the dissection of their genomic features will accelerate soybean breeding and facilitate sustainable agriculture and food production.
基金National Genetically Modified Organisms Breeding Special Projects of Chinese Agriculture Ministry(No.2009ZX08009-011B)by the Hundred Talents Project of the Chinese Academy of Sciences to CYH.
文摘Soybean (Glycine max), an important domesticated species originated in China, constitutes a major source ofedible oils and high-quality plant proteins worldwide. In spite of its complex genome as a consequence of an ancienttetraploidilization, platforms for map-based genomics, sequence-based genomics, comparative genomics and functionalgenomics have been well developed in the last decade, thus rich repertoires of genomic tools and resources are available,which have been influencing the soybean genetic improvement. Here we mainly review the progresses of soybean(including its wild relative Glycine soja) genomics and its impetus for soybean breeding, and raise the major biologicalquestions needing to be addressed. Genetic maps, physical maps, QTL and EST mapping have been so well achievedthat the marker assisted selection and positional cloning in soybean is feasible and even routine. Whole genomesequencing and transcriptomic analyses provide a large collection of molecular markers and predicted genes, which areinstrumental to comparative genomics and functional genomics. Comparative genomics has started to reveal theevolution of soybean genome and the molecular basis of soybean domestication process. Microarrays resources,mutagenesis and efficient transformation systems become essential components of soybean functional genomics.Furthermore, phenotypic functional genomics via both forward and reverse genetic approaches has inferred functionsof many genes involved in plant and seed development, in response to abiotic stresses, functioning in plant-pathogenicmicrobe interactions, and controlling the oil and protein content of seed. These achievements have paved the way forgeneration of transgenic or genetically modified (GM) soybean crops.
