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首页> 外文期刊>Journal of genetics >Auxin transport inhibitor induced low complexity petiolated leaves and sessile leaf-like stipules and architectures of heritable leaf and stipule mutants in Pisum sativum suggest that its simple lobed stipules and compound leaf represent ancestral forms in angiosperms
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Auxin transport inhibitor induced low complexity petiolated leaves and sessile leaf-like stipules and architectures of heritable leaf and stipule mutants in Pisum sativum suggest that its simple lobed stipules and compound leaf represent ancestral forms in angiosperms

机译：生长素转运抑制剂诱导的低复杂度的叶柄和无柄叶状托叶，以及豌豆可遗传叶和托叶突变体的结构表明其简单的叶状托叶和复合叶代表被子植物的祖先形式

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In angiosperms, leaf and stipule architectures are inherited species-specific traits. Variation in leaf and stipule sizes, and forms result from the interaction between abiotic and biotic stimuli, and gene regulatory network(s) that underlie the leaf and stipule developmental programme(s). Here, correspondence between variation in leaf and stipule architectures described for extant angiosperms and that induced mutationally and by imposition of stress in model angiosperm species, especially in Pisum sativum, was detected. Following inferences were drawn from the observations. (i) Several leaf forms in P. sativum have origin in fusion of stipule and leaf primordia. Perfoliate (and amplexicaul and connate) simple sessile leaves and sessile adnate leaves are the result of such primordial fusions. Reversal of changes in the gene regulatory network responsible for fusion products are thought to restore original stipule and leaf conditions. (ii) Compound leaf formation in several different model plants, is a result of promotion of pathways for such condition by gene regulatory networks directed by KNOX1 and LEAFY transcription factors or intercalation of the gene networks directed by them. (iii) Gene regulatory network for compound leaves in P. sativum when mutated generates highly complex compound leaves on one hand and simple leaves on other hand. These altered conditions are mutationally reversible. (vi) Simple leaves in model plants such as Arabidopsis thaliana despite overexpression of KNOX1 orthologues do not become compound. (v) All forms of leaves, including simple leaf, probably have origins in a gene regulatory network of the kind present in P. sativum.
机译：在被子植物中，叶片和托叶的结构是特定物种的遗传特征。叶片和托叶的大小和形式的变化是由非生物和生物刺激物之间相互作用以及基因和调节叶和托叶发育程序基础的网络造成的。在这里，检测到在现存被子植物中描述的叶片和托叶结构的变化之间的对应关系，以及在模型被子植物中，特别是在豌豆中，通过施加压力和突变而诱导的变化。从观察中得出以下推论。 （i）腐植假单胞菌的几种叶片形式起源于托叶和叶片原基的融合。过叶的（和双歧的和近生的）简单的无柄叶和无柄的无性叶是这种原始融合的结果。逆转负责融合产物的基因调控网络的变化被认为可以恢复原始的托叶和叶片状况。 （ii）在几种不同的模型植物中，复合叶的形成是通过由KNOX1和LEAFY转录因子指导的基因调控网络或由它们指导的基因网络的插入促进这种条件的途径的结果。 （iii）突变后，番茄中复叶的基因调控网络一方面产生高度复杂的复叶，另一方面产生简单的叶。这些改变的条件是突变可逆的。 （vi）尽管过表达KNOX1直向同源物，在模型植物如拟南芥中的单叶也不会复合。 （v）所有形式的叶子，包括简单的叶子，都可能起源于P. sativum中存在的那种基因调控网络。

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