Drought-induced changes in chlorophyll fluorescence, photosynthetic pigments, and thylakoid membrane proteins of Vigna radiata

被引:111
作者
Batra, Neha Gheek [1 ,2 ]
Sharma, Vinay [1 ]
Kumari, Nilima [1 ]
机构
[1] Banasthali Univ, Dept Biosci & Biotechnol, Po Banasthali Vidyapith 304022, Rajasthan, India
[2] IIS Univ, Dept Biotechnol, Jaipur 302020, Rajasthan, India
关键词
chlorophyll; chlorophyll a fluorescence; D1; drought; photosynthesis; OXIDATIVE STRESS; PHOTOSYSTEM-II; SALT TOLERANCE; PROLINE; PARAMETERS; OXYGEN; ACCUMULATION; ACCLIMATION; PERFORMANCE; METABOLISM;
D O I
10.1080/17429145.2014.905801
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
The effects of drought on chlorophyll fluorescence characteristics of PSII, photosynthetic pigments, thylakoid membrane protein (D1), and proline content in different varieties of mung bean plants were studied. Drought stress inhibits PSII activity and induces alterations in D1 protein. We observed a greater decline in the effective quantum yield of PSII, electron transport rate, and saturating photosynthetically active photon flux density (PPFDsat) under drought stress in var. Anand than var. K-851 and var. RMG 268. This may possibly be due to either downregulation of photosynthesis or photoinhibition process. Withholding irrigation resulted in gradual diminution in total Chl content at Day 4 of stress. HPLC analysis revealed that the quantity of beta-carotene in stressed plants was always higher reaching maxima at Day 4. Photoinactivation of PSII in var. Anand includes the loss of the D1 protein, probably from greater photosynthetic damage caused by drought stress than the other two varieties.
引用
收藏
页码:712 / 721
页数:10
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