关键词: 水稻, 弱光, 叶片

Abstract: A three-replicate, split-plot design was used with species as main plot treatments and shading as subplot treatments. Species treatments included Indica hybrid Ⅱ you 162, Dyou 68 and Gangyou 22. Shading treatments began after 10% panicles heading, and subplot treatments were wrapped with one or two layers of 49% shade or 69% shade. The leaves characteristics were measured. The leaves characteristics were obviously affected by the low-light stress. The length and the width of leaves under low-light stress were greater than those of the control. The average LAI of each species in 49% shade was higher than that of the control, and the LAI of each species in 69% shade was lower than that in 49% shade. The SLA of Dyou 68 and Gangyou 22 increased while the light-density decreased. The chla, chlb, chl(a+b) increased, and chl a/b decreased while light-density decreased. The relative dry matter weight of leaves in 49% shade or 69% shade was higher than that of the control.

Key words: RICE, LOW-LIGHT STRESS, LEAVES