1·Nowadays, studies on gravitropism and phototropism are active aspects in the field of plant physiology, many details of which have been studied.
植物的向重力性和向光性是目前植物生理学领域研究的热点，已进行了大量的研究。
2·If root cap was shaded when the root was irradiated, the root showed no negative phototropism 'And the root lost the characteristics of negative phototropism when root cap was divested completely.
对根冠遮光而给根尖其他部分照光时，稻根不发生负向光性反应。
3·It suggested that the blue light receptor might be the photoreceptor for the negative phototropism in rice root.
推测稻根负向光性的光受体可能为蓝光受体。