Leaf-movements of Mimosa pudica in relation to light
Leaf-movements of Mimosa pudica in relation to light
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DOI：
10.2307/2436393
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发表时间：
1936-01-01
影响因子：
3
通讯作者：
Pratt, R
中科院分区：
文献类型：
--
作者：
Burkholder, PR;Pratt, R
M.阴部交替关闭和开放时，受到交替的黑暗和光明在白天。在晚上正常的叶片闭合后，植物对光照保持数小时无反应，但在第二天清晨又恢复了对光线的敏感性。叶子在下午早些时候因变暗而过早关闭，第二天早上早些时候重新开放。“暗适应”，如通过突然变暗后叶片闭合所需的时间确定的，在30分钟内完成，并且随后的小叶根据先前的强度的重新打开在大约相同的时间内发生。机械刺激导致叶片立即关闭;重新开放发生在约3分钟内。无论是在光照下还是立即变暗。应用非常稀的/3-吲哚乙酸在羊毛脂糊一侧的枕引起明显的运动的叶柄和小叶。
Leaflets of M. pudica alternately close and open when subjected to alternating darkness and light during the daytime. After normal leaf-closure in the evening, the plants remain unresponsive to illumination for several hrs., but regain their sensitivity to light early the following morning. Leaves closed prematurely by darkening early in the afternoon, reopen earlier the next morning. "Dark adaptation," as determined by the time required for leaf closure following sudden darkening, is completed within 30 min., and subsequent reopening of the leaflets in light of the previous intensity occurs in about the same time. Mechanical stimulation causes immediate leaf closure; reopening occurs in about 3 min. whether kept in the light or immediately darkened. Applications of very dilute /3-indolyl acetic acid in lanolin paste to one side of the pulvini caused pronounced movements of petioles and leaflets.