拟南芥叶片数目变化突变体对营养生长时相转变的影响  

The Effect of Leaf Number-altered Mutants in Arabidopsis thaliana

作　　者：卢阳[1] 龙鸿[1,2] 

机构地区：[1]华中农业大学生命科学技术学院,武汉430070 [2]天津农学院园艺园林学院,天津300384

出　　处：《植物学报》2015年第3期331-337,共7页Chinese Bulletin of Botany

基　　金：教育部留学回国人员基金(No.4002-082017)

摘　　要：拟南芥(Arabidopsis thaliana)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。The vegetative growth of Arabidopsis thaliana includes a juvenile phase and an adult phase. The transition from the juvenile phase to the adult phase （vegetative phase change, VPC） is associated with changes in several mor- phological features of leaves, the shape of the shoot apical meristem, the onset of abaxial trichome and the expression of transcription factors like squamosa promoter-binding protein-like family. Recently, signals that promote VPC were found to be derived from leaf primordium. To explore the effect of leaf number on VPC, we analyzed the VPC processes with two types of rosette leaf-altered mutants and defoliated wild-type plants. We found that decreasing number of rosette leaves delayed vegetative phase change. However, the amp1-1 mutant, with increased number of rosette leaves, does not promote VPC. We proposed that photosynthesis may affect the transition of the leaf-derived signals, regulating VPC.

关 键 词：拟南芥 SPL-3 营养生长时相转变 

分 类 号：Q943[生物学—植物学]