A new theory of phototropism - its regulation by a light-induced gradient of auxin-inhibiting substances.
A new theory of phototropism - its regulation by a light-induced gradient of auxin-inhibiting substances.
复制标题
向光性的新理论 - 它通过光诱导的生长素抑制物质梯度进行调节。
DOI：
10.1111/j.1399-3054.1990.tb00047.x
复制
发表时间：
1990
影响因子：
6.4
通讯作者：
K. Hasegawa
中科院分区：
文献类型：
--
作者：
J. Bruinsma;K. Hasegawa
Against the wholly indirect evidence of a lateral gradient of auxin as an explanation of phototropic curvature according to the Cholodny-Went theory, direct measurement of free. extractable or diffusable indoleacetic acid from phototropically curving hypocotyls and coleoptiles invariably shows an even distribution of auxin. On the contrary, growth inhibitors extracted or diffused from these organs turn out to be accumulated at the irradiated side, as proposed already by A. H. Blaauw (Z. Bot. 7: 465. 1915). the classical experiment by F. W. Went (Rec. Trav. Bot. Neerl. 25:1, 1928) has to be interpreted as evidence for a lateral gradient of substance(s) inhibiting auxin activity Phototropic curvature is thus a matter of differential auxin sensitivity across the unilaterally irradiated organ.
