棉花开花转换时间的确定
首发时间:2019-05-15
摘要:植物由营养期到生殖期的转变(开花转换)是其生命周期中的重要发育转变,棉花开花转换作为直接影响棉花开花时间以及花器官发育的重要生长阶段,目前尚未有相关报道。本研究为了明确棉花开花转换发生的时间,对比观察了棉花早晚熟品种在营养生长阶段顶端分生组织生长锥的细胞形态变化,表明棉花在第3~5片真叶可见时发生开花转换,伴随开花转换事件的发生,调控棉花开花的关键基因表达量迅速升高。本研究填补了棉花开花转换过程细胞生物学和分子生物学上的空白,为深入开展棉花开花的分子研究提供了重要的理论依据。
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Determination of cotton floral transition time
Abstract:Floral transition is a vital process during plant life cycle, which determines the switch from vegetative growth to reproductive growth. Cotton floral transition is an important growth stage that directly affects cotton flowering time and flower organ development. There is no relevant report on cotton yet. In order to clarify the time of cotton floral transition , the architecture of SAM (shoot apical meristem) during vegetative growth was compared between early and late maturity varieties, and the results suggested that cotton floral transition happened after the third true leaf was visible. The expression of key genes regulating flowering increased rapidly. This study covered the gaps in cotton floral transition on cell and molecular biology, which provided an important theoretical basis for further molecular researches on cotton flowering control.
Keywords: cotton maturity floral transition flowering time
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