ROLE OF POLAR MOVEMENT OF IAA IN DEVELOPMENT OF PEG IN CUCUMIS-SATIVUS L
ROLE OF POLAR MOVEMENT OF IAA IN DEVELOPMENT OF PEG IN CUCUMIS-SATIVUS L
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DOI：
10.1086/336776
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发表时间：
1975-01-01
影响因子：
--
通讯作者：
GERSANI, M
中科院分区：
文献类型：
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作者：
WITZTUM, A;GERSANI, M
摘要研究了黄瓜幼苗中主要由表皮细胞组成的径向生长结构“peg”的发育解剖学。黄瓜幼苗过渡区生长素运输的生理障碍和IAA随重力作用的横向分布决定了径向增大细胞的位置。IAA- 14c随重力的横向分布解释了内源IAA如何限制水平生长幼苗的上部径向扩展。讨论了IAA在径向生长中的作用。
The developmental anatomy of the "peg" in Cucumis seedlings, a radially growing structure composed largely of cortical cells, was studied. A physiological barrier to auxin transport in the transition zone of Cucumis seedlings and the lateral distribution of IAA as a function of gravity determine the position of radially enlarging cells. The lateral distribution of IAA-14C as a function of gravity explains how endogenous IAA can be limiting for radial extension on the upper side of horizontally growing seedlings. The role of IAA in radial growth is discussed.