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干旱胁迫诱导新疆野苹果细胞程序性死亡的细胞形态学研究

DOI: 10.3321/j.issn:1000-7091.2007.01.012, PP. 50-55

Keywords: 干旱胁迫,新疆野苹果,细胞程序性死亡,细胞形态学,诱导

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Abstract:

用聚乙二醇(Polyethyleneglycol,PEG6000)处理新疆野苹果(Malussieversii(Ledeb)Roem.)幼苗。通过对其叶片及根系中各细胞器的超微结构分析发现,干旱胁迫能诱导新疆野苹果发生细胞程序性死亡,并具有以下特点:随着干旱处理时间的延长,根系中各细胞器形态结构发生变化的时间普遍早于叶片;同是叶片,海绵组织中各细胞器形态结构发生变化的时间早于栅栏组织;同是根系,皮层细胞中各细胞器形态结构变化的时间普遍早于中柱细胞。

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