蒜鳞片薄壁细胞衰败过程中类外连丝的形成及其共质传输能力的调节(简报)

THE FORMATION AND SYMPLASTIC TRANSPORT FUNCTION OF ECTODESMATA-LIKE IN GARLIC DURING THE PARENCHYMA CELLS DECLINING

在植物生长发育过程中，由于局部组织（细胞）的衰退或脱落．存活细胞与衰亡（或脱落）细胞分界壁上的胞间连丝衍变为类外连丝结构。这已先后在小麦胚胎发育、幼胚分化、蒜鳞茎休眠进程中以及玉米根冠组织中得到了论证。前文已曾报道．在玉米根冠细胞生长脱落进程中，脱落细胞与相邻细胞间胞间连丝有被拉伸、断裂形成类外连丝的结构变化．并经药理学试验表明。肌动蛋白和肌球蛋白共同参与了类外连丝通透性的调节。

Using fluorescence and electron microscopy, the uhrastructure and symplastic transport function of Eetodesmata-like （ED-like） were studied in the declining parenchyma cells of Garlic during germination period. The results showed that plasmodesmata （ PD） were gradually stretched and broke into ED-like. The diameter of PD and the diameter of appressed endoplasmic reticulum （AER） in PD underwent a series of changes. F-actin and myosin might take part in the regulation of the symplastic transport of the ED-like.