【摘要】 本文对近年来有关植物向光性反应的研究结果作一综述:1) 向光素和隐花色素是植物向光反应中的主要光受体,光敏色素在植物向光性反应中也起一定的作用; 2) 对植物的光辐照度-弯曲度曲线的分析,可知植物的正向光性运动有两种反应,即第一次正向光性弯曲和第二次正向光性弯曲; 3) 拟南芥(Arabidopsis thaliana)和水稻(Oryza sativa)等植物的根系具有负向光性的特性,根的负向光性倾斜生长角度为负向光性生长和向重性生长相互作用的矢量和; 4) 生长素的胞间运输依赖于生长素载体,生长素载体的不对称分布和动态运动是生长素极性运输和向性运动的分子基础。更多还原

【Abstract】 Recent advances in the studies of phototropism are reviewed in this paper. Phototropinand cryptochrome are the two key photoreceptors of plant phototropism, and phytochrome plays animportant role in plant phototropism too. The root of rice and Arabidopsis thaliana have the charac-teristic of negative phototropism, the curvature is the vector sum of the negative phototropism andgravitropism. Many new investigations have presented evidences that both asymmetric localizationand dynamic redistribution of IAA carrier is consistent with the role of controlling the polar IAAtransport.更多还原