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植物学报  2015 

拟南芥叶片数目变化突变体对营养生长时相转变的影响

DOI: 10.3724/SP.J.1259.2015.00331, PP. 331-336

Keywords: 拟南芥,SPL3,营养生长时相转变

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Abstract:

?拟南芥(Arabidopsisthaliana)的营养生长可以分为2个阶段:幼龄期与成熟期。由幼龄期向成熟期的转变(VPC)与叶片的形态学特征、茎顶端分生组织(SAM)形状、远轴面表皮毛的出现以及SPL家族转录因子表达水平的变化相关。研究表明,造成这种转变的信号来源于叶原基。该研究利用2种莲座叶数目改变了的突变体和对野生型切除叶片的方法,分析了叶片数目对VPC的影响。结果表明,莲座叶数目的减少推迟了VPC的发生;而莲座叶数目增多突变体amp1-1并未使VPC的发生提前,推测叶源信号的产生受到了光合作用的影响。

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