Ultracytochemical localization of Ca^(2+) during the phloem ganglion development in Phyllostachys edulis  

作　　者：YU Fen DING Yulong 

机构地区：[1]Bamboo Research Institute,Nanjing Forestry University,Nanjing 210037,China

出　　处：《Frontiers in Biology》2006年第3期219-224,共6页生物学前沿（英文版）

基　　金：supported by the National Natu-ral Science Foundation of China (No.30271064).

摘　　要：Ultracytochemical localization of Ca^(2+)was in-vestigated using the potassium pyroantimonate precipitation method during the development of phloem ganglion.The result showed that Ca^(2+)was mainly localized in the cell wall and intercellular spaces in the initiating phase.With the de-velopment of the phloem ganglion,the distribution of Ca^(2+)transferred to the vacuole,and the Ca^(2+)deposits in the cell wall and intercellular space decreased.At the later stage of the developmental phase,Ca^(2+)was distributed in the tono-plast and vacuole phagocytosis,and the vacuole became the main calcium storage in this phase.At the early stage of maturation of the phloem ganglion,most of the phloem ganglion cells’vacuoles cracked,and the cytoplastic Ca^(2+)content increased in large number.In the mature phloem ganglion,not only were there a few Ca^(2+)localized in the cytoplast of mature cells,but also in the differentiating cells in the vacuoles.Ca^(2+)was distributed in the tonoplast and vacuole contents;initiating cells almost had no Ca^(2+).In general,Ca^(2+)concentration in mature phloem ganglion cells was at a low level.The results indicated that the changes in Ca^(2+)distribution evoked the phloem ganglion generation,and Ca^(2+)regulated the physiological function of the phloem ganglion.

关 键 词：phloem ganglion DEVELOPMENT CA^(2+) physio-logical function 

分 类 号：R73[医药卫生—肿瘤]