Water Potential, Translocation and Assimilate Partitioning
Water Potential, Translocation and Assimilate Partitioning
复制标题
水势、易位和同化分配
DOI：
10.1093/jxb/37.4.495
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发表时间：
1986
影响因子：
6.9
通讯作者：
M. R. Thorpe
中科院分区：
文献类型：
--
作者：
A. Lang;M. R. Thorpe
Lang, A 和 Thorpe, M. R. 1986。水势、易位和同化分配。—J.实验值。机器人。 37：495-503。从理论和幼小的菜豆植物实验中检验了水分状况对易位和同化物分配的影响。理论预测易位不太可能直接受到水状况的影响。然而，植物内的水势差异会影响易位流，水势较低的区域会吸引不成比例的大量同化物。这一预测得到了菜豆实验的支持，其中根部的分配模式响应于将其部分浸泡在不同渗透压的溶液中而迅速变化。考虑了这些发现与自然条件下植物生长的相关性，并提出了水势梯度可能是控制分配的重要因素的证据。关键词——韧皮部易位，木质部运输，分配，水势，控制，渗透势。通讯地址：物理与工程实验室，DSIR，私人包，下哈特，新西兰。
Lang, A, and Thorpe, M. R. 1986. Water potential, translocation and assimilate partitioning.—J. exp. Bot. 37: 495-503. The effect of water status upon translocation and assimilate partitioning is examined both from theory and in an experiment with young Phaseolus plants. Theory predicts that translocation is unlikely to be directly affected by water status. However, water potential differences within plants should influence translocation flow, with regions at lower potentials attracting disproportionately large shares of assimilate. This prediction is supported in the experiment with Phaseolus in which the pattern of partitioning in the root changed rapidly in response to bathing portions of it in solutions of different osmolarity. The relevance of these findings to the growth of plants under natural conditions is considered and evidence is presented that water potential gradients may be an important factor in the control of partitioning. Key words-— Phloem translocation, xylem transport, partitioning, water potential, control, osmotic potential. Correspondence to: Physics and Engineering Laboratory, DSIR, Private Bag, Lower Hutt, New Zealand.