树木茎干中的水分吸收、直径变化和非线性扩散。
Water uptake, diameter change, and nonlinear diffusion in tree stems.
作者信息
Parlange J Y, Turner N C, Waggoner P E
机构信息
Department of Ecology and Climatology, The Connecticut Agricultural Experiment Station, New Haven, Connecticut 06504.
出版信息
Plant Physiol. 1975 Feb;55(2):247-50. doi: 10.1104/pp.55.2.247.
Abstract
A diffusion model for phloem swelling and contraction is proposed in which the rate of water movement changes markedly with moisture content. Good agreement between the actual swelling of the phloem of cotton stems and that predicted by the model was obtained. This result implies that water moves more readily into the phloem when it becomes wetter. This model also explains the lag of shrinkage of pine stems behind the water potential of the foliage and predicts that the lag is related to the thickness of the phloem.
摘要
提出了一种用于韧皮部肿胀和收缩的扩散模型，其中水分移动速率随含水量显著变化。该模型预测的棉花茎韧皮部实际肿胀情况与实际测量结果吻合良好。这一结果表明，当韧皮部变得更湿润时，水分更容易进入其中。该模型还解释了松树茎干收缩滞后于叶片水势的现象，并预测这种滞后与韧皮部厚度有关。
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本文引用的文献
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Plant Physiol. 1973 May;51(5):859-62. doi: 10.1104/pp.51.5.859.
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Water potential gradients in field tobacco.田间烟草中的水势梯度
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