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哪有情可长 (2024-10-30 19:59):
#paper Genetic control of branching patterns in grass inflorescences 2022,The Plant Cell doi.org/10.1093/plcell/koac080, 文章对禾本科植物的产量主要受花序组织控制,其中花序发育是禾本科植物的研究重点。这篇综述聚焦于花序分生组织向小穗过渡的生长时期,详细阐述了禾本科植物花序结构的生长特征,论述了一些禾本科作物花序发育的保守模块,如腋分生组织、次级和高级分支结构的形成,此外还分析了生长激素及多个基因构成的调控网络在营养生长和小穗发育中的功能,其中具体的发育进程因自然和人为选择的不同而存在显著差异。
Abstract:
Abstract Inflorescence branching in the grasses controls the number of florets and hence the number of seeds. Recent data on the underlying genetics come primarily from rice and maize, although … >>>
Abstract Inflorescence branching in the grasses controls the number of florets and hence the number of seeds. Recent data on the underlying genetics come primarily from rice and maize, although new data are accumulating in other systems as well. This review focuses on a window in developmental time from the production of primary branches by the inflorescence meristem through to the production of glumes, which indicate the transition to producing a spikelet. Several major developmental regulatory modules appear to be conserved among most or all grasses. Placement and development of primary branches are controlled by conserved auxin regulatory genes. Subtending bracts are repressed by a network including TASSELSHEATH4, and axillary branch meristems are regulated largely by signaling centers that are adjacent to but not within the meristems themselves. Gradients of SQUAMOSA-PROMOTER BINDING-like and APETALA2-like proteins and their microRNA regulators extend along the inflorescence axis and the branches, governing the transition from production of branches to production of spikelets. The relative speed of this transition determines the extent of secondary and higher order branching. This inflorescence regulatory network is modified within individual species, particularly as regards formation of secondary branches. Differences between species are caused both by modifications of gene expression and regulators and by presence or absence of critical genes. The unified networks described here may provide tools for investigating orphan crops and grasses other than the well-studied maize and rice. <<<
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