中国油料作物学报2017，Vol.39Issue(5)：648-654,7.DOI:10.7505/j.issn.1007-9084.2017.05.009
荫蔽花生转入自然光照下光合作用的光抑制及光保护机制
Photo - inhibition and photo - protective mechanisms of shaded peanut leaves after re - exposure to natural light
摘要
Abstract
The objective of this study was to discover the mechanisms of the photo - inhibition and photo - pro-tection of peanut from shadow to high light,and further to provide a theoretical basis for high - yield cultivation of peanut intercropped with wheat. In our study,three treatments were set up from seedling emergency with "Baisha 1016",and these treatments were(1)Control,with natural light;(2)S 50 ,sunlight - shaded of 50% by shade 85 ,sunlight - shaded of 85% . The photosynthetic and chlorophyll fluorescence parameter,superoxide production rate and activity of antioxidant enzymes were measured. Results showed that:compared to those of the control with full light,the photosynthesis rate (P n )and chlorophyll fluorescence parameter (F v / Fm )of shading peanut leaves decrease continuously in the first 5d,the P n and Fv / Fm of peanut ranked as Control > S50 > S85 on net;(3)S the 5th day after shade removed. Pn under S50 and S85 treatments restored to the level of control on the 10th and 20th days after shade removed,and F v / Fm under S50 and S85 treatments restored to the level of Control on the 12th and 15th days after shade removed. Sunlight - shaded treatments significantly increased non - photochemical quenching (NPQ)and initial fluorescence (F o )within the first 0 - 10 days,and those were gradually reduced to the level similar to the countrol after 10 days. The active oxygen anion increased rapidly and ranked as S85 > S50 >Control on the 5th days after shade removed,yet the higher production of active oxygen anion was reduced with the increasing activities of superoxide dismutase (SOD)or catalase (CAT). The thermal dissipation and antioxidant were important in improving the adaptability of peanut leaves to sudden intensive sunlight.关键词
花生/光抑制/光保护/活性氧/热耗散Key words
peanut/photo - inhibition/photo - protection/superoxide/thermal dissipation分类
农业科技引用本文复制引用
吴正锋,陈殿绪,郑亚萍,孙学武,左绍玲,沈浦,刘俊华,万书波,郑永美,于天一,王才斌..荫蔽花生转入自然光照下光合作用的光抑制及光保护机制[J].中国油料作物学报,2017,39(5):648-654,7.基金项目
山东省自然科学基金项目(ZR2016CM07) （ZR2016CM07）
山东省农业科学院农业科技创新工程项目(CXGC2016B05) （CXGC2016B05）
现代农业产业技术体系建设专项基金(CARS-13) （CARS-13）
国家科技支撑计划(2014BAD11B04) （2014BAD11B04）
