Leaf xeromorphy as related to physiological and structural influences
Leaf xeromorphy as related to physiological and structural influences
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DOI:
10.1007/bf02869988
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发表时间:
1950-10
期刊:
影响因子:
--
通讯作者:
L. M. Shields
中科院分区:
文献类型:
--
作者:
L. M. Shields
The greater part of Maximov's masterpiece, The Plant in Relation to Water, based on original research and on more than 450 references, was ready for the press in 1925. While few investigators have recently considered the specific problems of drought resistance and xeromorphy, several significant contributions clarify earlier observations which were not understood 25 years ago. White's work on root pressure (1938) revealed why water moves in one direction through plant cells. Turrell's measurements of internally exposed leaf surface in xerophytes (1936) explained Maximov's observation that in the presence of adequate moisture transpiration is higher in xeromorphic than in mesomorphic leaves. Boon-Long (1941) interpreted the effect of high osmotic pressure in retarding water loss through decreasing cell permeability. Popp (1926), Shirley (1929) and Turrell (1940a, b) evaluated critically the influence of light intensity on leaf morphology. Wylie's studies of leaf structure in mesophytic and tropical dicotyledons (1939, 1943, 1946) suggest similar problems of transfer and contrasting surface-volume relationships in xeromorphic leaves. Mothes (1931, 1932) detected the effect of a nitrogen deficiency in contributing to xeromorphy. Other investigations of mineral nutrition have shown the effects of a deficiency or an excess of an element on water relations and structural modifications (Prianischnikov, 1928, 1935; Lundegardh, 1932; Hoagland and Broyer, 1943, et al.). Hoagland and Broyer (1936) determined the mechanism of absorption of these elements which so significantly affect the structure of many plant parts.