Relationship of photosynthetic efficiency and seed-setting rate in two contrasting rice cultivars under chilling stress

被引：18

作者：

Wang, L. -Z. ^{[1
]}

Wang, L. -M. ^{[1
]}

Xiang, H. -T. ^{[1
]}

Luo, Y. ^{[1
]}

Li, R. ^{[1
]}

Li, Z. -J. ^{[1
]}

Wang, C. -Y. ^{[1
]}

Meng, Y. ^{[1
]}

机构：

[1] Heilongjiang Acad Agr Sci, Crop Tillage & Cultivat Inst, Harbin 150086, Heilongjiang, Peoples R China

来源：

PHOTOSYNTHETICA | 2016年 / 54卷 / 04期

关键词：

abscisic acid; chlorophyll fluorescence; malondialdehyde; peroxidase; proline; superoxide dismutase; ORYZA-SATIVA L; OXIDATIVE STRESS; ABSCISIC-ACID; LEAF SENESCENCE; CHLOROPHYLL FLUORESCENCE; INDUCED PHOTOINHIBITION; HYDROGEN-PEROXIDE; WATER-STRESS; LEAVES; EXPRESSION;

D O I：

10.1007/s11099-016-0648-1

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Low temperature during the vegetative stage affects rice (Oryza sativa L.) seed-setting rate in Heilongjiang province at Northeast China. However, little is known about changes of the photosynthetic rate and physiological response in contrasting rice cultivars during chilling periods. In this study, two rice cultivars with different chilling tolerance were treated with 15A degrees C from June 27 to July 7. The chilling-susceptive cultivar, Longjing11 (LJ11), showed a significant decrease in a ripening rate and seed-setting rate after being treated for four days, whilst chilling-tolerant cultivar, Kongyu131 (KY131), was only slightly affected after 4-d treatment. The photosynthetic activities, chlorophyll contents, and antioxidative enzyme activities in LJ11 decreased significantly along with the chilling treatment. The decrease in -carotene contents might play a role as it could cause direct photooxidation of chlorophylls and lead to the inhibition of the photosynthetic apparatus. In the meantime, no significant damage was found in leaves of KY131 from June 27 to July 11. In conclusion, the chilling-tolerance mechanism of rice is tightly related to the photosynthetic rate, metabolism of reactive oxygen species, and scavenging system in the vegetative stage.

引用

页码：581 / 588

页数：8

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