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OALib Journal期刊
ISSN: 2333-9721
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植物根尖分生组织干细胞调控模式
DOI: 10.3969/j.jssn.1000-2006.2012.04.027, PP. 127-132
Keywords: 根尖分生组织,静止中心,干细胞,反馈调节,植物激素
Abstract:
静止中心(qc)形成和干细胞区特化是植物根尖分生组织确立的标志。静止中心位于根尖分生组织中心,干细胞围绕在静止中心细胞周围。依赖于生长素的plt途径和不依赖于生长素的scr/shr途径共同发挥维持静止中心细胞稳定的作用。静止中心和干细胞区的柱干细胞之间存在类似于wus/clv3的wox5/acr4/cle40的反馈抑制调节途径,该调节途径维持着静止中心细胞和柱干细胞之间的平衡。静止中心和其他类型干细胞之间也可能存在类似的反馈抑制调节途径。生长素、细胞分裂素、赤霉素等植物激素信号在根干细胞功能发挥方面也起到重要作用,与各种基因一起组成根分生组织干细胞调控网络。
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