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首页> 外文期刊>Journal of genetics >Genetic control of leaf-blade morphogenesis by the INSECATUS gene in Pisum sativum
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Genetic control of leaf-blade morphogenesis by the INSECATUS gene in Pisum sativum

机译：豌豆中INSECATUS基因对叶片形态发生的遗传控制

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摘要

To understand the role of INSECATUS (INS) gene in pea, the leaf blades of wild-type, ins mutant and seven other genotypes, constructed by recombining ins with uni-tac, af, tl and mfp gene mutations, were quantitatively compared. The ins was inherited as a recessive mutant allele and expressed its phenotype in proximal leaflets of full size leaf blades. In ins leaflets, the midvein development was arrested in distal domain and a cleft was formed in lamina above this point. There was change in the identity of ins leaflets such that the intercalary interrupted midvein bore a leaf blade. Such adventitious blades in ins, ins tl and ins tl mfp were like the distal segment of respective main leaf blade. The ins phenotype was not seen in ins af and ins af uni-tac genotypes. There was epistasis of uni-tac over ins. The ins, tl and mfp mutations interacted synergistically to produce highly pronounced ins phenotype in the ins tl mfp triple mutant. The role(s) of INS in leaf-blade organogenesis are: positive regulation of vascular patterning in leaflets, repression of UNI activity in leaflet primordia for ectopic growth and in leaf-blade primordium for indeterminate growth of rachis, delimitation of proximal leaflet domain and together with TL and MFP homeostasis for meristematic activity in leaflet primordia. The variant apically bifid shape of the affected ins leaflets demonstrated that the leaflet shape is dependent on the venation pattern.
机译：为了了解INSECATUS（INS）基因在豌豆中的作用，定量比较了通过将ins与uni-tac，af，tl和mfp基因突变重组而构建的野生型，ins突变体和其他七种基因型的叶片。该ins被遗传为隐性突变等位基因，并在全尺寸叶片的近侧小叶中表达其表型。在ins小叶中，中脉发育在远侧区域被阻滞，高于此点的椎板中形成了裂痕。 ins小叶的身份发生了变化，使cal间中断的中脉带有叶片。 ins，ins tl和ins tl mfp中的这种不定叶片就像各自主叶片的远端。在ins af和ins af单tac基因型中未发现ins表型。在ins上有uni-tac的上位性。 ins，tl和mfp突变协同相互作用以在instlmfp三突变体中产生高度显着的ins表型。 INS在叶叶片器官发生中的作用是：积极调节小叶中的血管模式，抑制小叶原基中异位生长的UNI活性，抑制小叶原基的不确定生长，限定近端小叶结构域和与TL和MFP体内稳态一起用于小叶原基的分生组织活动。受影响的ins瓣叶的变体顶端两分形的形状表明，瓣叶的形状取决于通气模式。

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