ASPECTS OF VASCULAR ANATOMY AND DIFFERENTIATION OF VASCULAR TISSUES AND TRANSFER CELLS IN VEGETATIVE NODES OF WHEAT
ASPECTS OF VASCULAR ANATOMY AND DIFFERENTIATION OF VASCULAR TISSUES AND TRANSFER CELLS IN VEGETATIVE NODES OF WHEAT
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DOI：
10.1071/bt9790703
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发表时间：
1979-01-01
影响因子：
1.1
通讯作者：
OBRIEN, TP
中科院分区：
文献类型：
--
作者：
BUSBY, CH;OBRIEN, TP
木质部转移细胞在成熟小麦节的离叶痕迹中发育强烈。它们的分化是在这些管束中第一个管状分子出现后不久开始的，当管束所属的叶子完全展开时，管壁长入发育达到顶峰。木质部转移细胞在将成熟叶木质部中的溶质转移到茎尖处的发育叶中发挥了重要作用。进一步表明，它们是正常木质部蒸腾途径的一个组成部分，弥补了木质部在成熟节中的限制和不连续性。韧皮部转移细胞也出现在结节脉管系统分化的早期，尽管它们的功能尚不清楚。
Xylem transfer cells are strongly developed in the departing leaf traces of the mature wheat node. Their differentiation is initiated soon after the appearance of the 1st tracheary elements in these bundles, and wall ingrowth development reaches its peak just as the leaf to which the bundle belongs becomes fully expanded. The xylem transfer cells apparently play an important role in redirecting solutes traveling in the xylem of the mature leaf to the developing leaves at the shoot apex. It is further suggested that they form an integral part of the normal xylem transpiration pathway, compensating for xylem restrictions and discontinuities in the mature node. Phloem transfer cells also appear very early in the differentiation of the nodal vasculature, although their function remains obscure.