摘要
在光抑制条件下水稻不同品种的光合CO_2交换能力和量子效率均降低与叶绿体的电子传递活力和光合酶RuBPc受到抑制有关。强光逆境对光系统Ⅱ的抑制重于对光系统Ⅰ的抑制。与光抑制敏感的品种相比,耐光抑制品种在强光下光系统Ⅱ有较高活力。 籼粳杂种稻的光抑制特性更象粳稻,在株型育种的基础上,利用籼粳配组培育具有耐光抑制特性的优良品种,是当前育种的重要途径之一。
The sensitivity of different rice varieties was studied on the leaf, chloroplast andenzyme levels respectively. It was found that the decrease of the photosynthetic CO_2 ex-change rate and photosynthetic quantum yield in different rice varieties underphotoinhibitory conditions was related to the inhibition of photosynthetic enzymeRuBPc and electron transport activities under strong light. Photosystem Ⅱ was inhib-ited more drastically than photosystem Ⅰ under strong light stress. Based on theirresponse to light strdss, different rice varieties could be divided intophotoinhibition--tolerant (most ofj aponica rice) and photoinhibition--sensitive (mostof indica rice) groups physiologically. Compared with the PI--sensitive varieties, thePI--tolerant varieties showed higher electron transport activities under strong light con-ditions in photosystem Ⅱ. The photoinhibition characteristics of hybrids between indica and japonica werequite similar to those of the japonica parents. Crossing indica with japonica, therefore,might be one of the important approaches to develop highbr--yielding rice varietieswith good photosynthetic traits.
出处
《作物学报》
CAS
CSCD
北大核心
1993年第1期23-28,共6页
Acta Agronomica Sinica
关键词
水稻
光合作用
光抑制
敏感性
Rice Photoinhibition of photosynthesis
Photosynthetic electron transport activities
Ribulose 1,5-biphosphate carboxylase
