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操纵水稻叶片SHR和生长素诱导水稻类C_(4)叶脉分布样式产生 被引量:3
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作者 董文涛 常天根 +7 位作者 戴慧玲 杨卫兵 苏语 晁代印 朱新广 王鹏 于楠 王二涛 《Science Bulletin》 SCIE EI CAS CSCD 2023年第24期3133-3136,M0004,共5页
C_(4)植物叶片的维管束表现出独特的花环结构,该结构由位于内层的维管束鞘细胞和外层的叶肉细胞组成,赋予C_(4)植物拥有相比于C_(3)植物更高的光合速率.目前已鉴定到60多种独立的花环结构变体,暗示花环结构经历了趋同进化.高效的C_(4)... C_(4)植物叶片的维管束表现出独特的花环结构,该结构由位于内层的维管束鞘细胞和外层的叶肉细胞组成,赋予C_(4)植物拥有相比于C_(3)植物更高的光合速率.目前已鉴定到60多种独立的花环结构变体,暗示花环结构经历了趋同进化.高效的C_(4)光合作用依赖于C_(4)植物叶片高的叶脉与叶肉细胞比——这也是C_(4)演化的关键.然而,高叶脉密度形成的机制仍然未知,这阻碍了将C_(4)性状引入C_(3)作物的工程化改造.前人尝试通过在水稻叶片中过量表达调控C_(4)玉米叶脉模式的多种因子,但未能成功诱导出类C_(4)叶脉分布样式的叶片.在本研究中,我们发现在水稻和玉米中过量表达SHORT ROOT(SHR)有助于促进叶肉细胞的分裂,增加相邻叶脉间的细胞数量.水稻和玉米的SHR多突变体叶片的叶肉细胞分裂减少,相邻叶脉之间的叶肉细胞数量显著降低.通过增加C_(3)水稻叶片中SHR和处理生长素,我们在水稻中成功诱导产生了类C_(4)叶脉分布样式的叶片,对C_(3)作物的工程化改造具有重要意义. 展开更多
关键词 维管束鞘细胞 叶肉细胞 水稻叶片 生长素 趋同进化 叶脉密度 光合作用 花环结构
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ePlant for quantitative and predictive plant science research in the big data era --Lay the foundation for the future model guided crop breeding, engineering and agronomy 被引量:4
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作者 Yi Xiao tiangen chang +7 位作者 Qingfeng Song Shuyue Wang Danny Tholen Yu Wang changpeng xin Guangyong Zheng Honglong Zhao Xin-Guang Zhu 《Frontiers of Electrical and Electronic Engineering in China》 CSCD 2017年第3期260-271,共12页
Background: The increase in global population, climate change and stagnancy in crop yield on unit land area basis in recent decades urgently call for a new approach to support contemporary crop improvements, ePlant i... Background: The increase in global population, climate change and stagnancy in crop yield on unit land area basis in recent decades urgently call for a new approach to support contemporary crop improvements, ePlant is a mathematical model of plant growth and development with a high level of mechanistic details to meet this challenge. Results: ePlant integrates modules developed for processes occurring at drastically different temporal (10-8-106 seconds) and spatial (10-10-10 meters) scales, incorporating diverse physical, biophysical and biochemical processes including gene regulation, metabolic reaction, substrate transport and diffusion, energy absorption, transfer and conversion, organ morphogenesis, plant environment interaction, etc. Individual modules are developed using a divide-and-conquer approach; modules at different temporal and spatial scales are integrated through transfer variables. We further propose a supervised learning procedure based on information geometry to combine model and data for both knowledge discovery and model extension or advances. We finally discuss the recent formation of a global consortium, which includes experts in plant biology, computer science, statistics, agronomy, phenomics, etc. aiming to expedite the development and application of ePlant or its equivalents by promoting a new model development paradigm where models are developed as a community effort instead of driven mainly by individual labs' effort. Conclusions: ePlant, as a major research tool to support quantitative and predictive plant science research, will play a crucial role in the future model guided crop engineering, breeding and agronomy. 展开更多
关键词 systems modeling QUANTITATIVE PREDICTIVE HOMEOSTASIS multiscale crop in silico
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Systems model-guided rice yield improvements based on genes controlling source, sink, and flow 被引量:5
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作者 Pan Li tiangen chang +7 位作者 Shuoqi chang Xiang Ouyang Mingnan Qu Qingfeng Song Langtao Xiao Shitou Xia Qiyun Deng Xin-Guang Zhu 《Journal of Integrative Plant Biology》 SCIE CAS CSCD 2018年第12期1154-1180,共27页
A large number of genes related to source, sink,and flow have been identified after decades of research in plant genetics. Unfortunately, these genes have not been effectively utilized in modern crop breeding. This pe... A large number of genes related to source, sink,and flow have been identified after decades of research in plant genetics. Unfortunately, these genes have not been effectively utilized in modern crop breeding. This perspective paper aims to examine the reasons behind such a phenomenon and propose a strategy to resolve this situation. Specifically, we first systematically survey the currently cloned genes related to source, sink, and flow;then we discuss three factors hindering effective application of these identified genes, which include the lack of effective methods to identify limiting or critical steps in a signaling network, the misplacement of emphasis on properties, at the leaf, instead of the whole canopy level,and the non-linear complex interaction between source,sink, and flow. Finally, we propose the development of systems models of source, sink and flow, together with a detailed simulation of interactions between them and their surrounding environments, to guide effective use of the identified elements in modern rice breeding. These systems models will contribute directly to the definition of crop ideotype and also identification of critical features and parameters that limit the yield potential in current cultivars. 展开更多
关键词 Systems model-guided rice yield improvements based on genes controlling source
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