植物向光性是指植物生长随光方向弯曲的现象。迄今,国内所有植物生理学教材都采用向光侧生长素含量低,背光侧生长素含量高,从而导致向光侧生长慢而背光侧生长快,使植物发生向光弯曲的假说来解释这种现象。早在1928年,Went就发现燕麦胚芽鞘经单侧光照后,背光侧顶端扩散到琼脂凝胶 Plant phototropism refers to the phenomenon that plant growth curves with the direction of light. To date, all plant physiology textbooks in China have adopted the hypothesis that the auxin content is low on the light side and the auxin content on the backlight side is high, resulting in slow growth on the light side and rapid growth on the backlight side, and the phenomenon of light bending in the plants is explained to explain this phenomenon. . As early as 1928, Went discovered that after the unilateral irradiation of the oat coleoptile, the tip of the backlight diffused to the agar gel