| Effect of drought on leaf physiological parameters and yield of wheat at booting stage |
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| DOI：10.7606/j.issn.1000-7601.2014.03.001 |
| Key Words: winter wheat soil drought booting stage leaf physiological traits yield evaluation of drought resistance |
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| Abstract: |
| The objective of this work is to elucidate the effect of soil drought on leaf physiological parameters at booting stage and yield of winter wheat. We selected Xiaoyan 22 and other 6 cultivars as experimental materials, and measured the activities of antioxidative enzymes including the supe
roxide dismutase (SOD), peroxidase (POD), catalase (CAT), as well as relative electric conductivity, malondialdehyde (MDA) content and other physiological traits under different water conditions by pot experiment. The results showed variations in the effect of moderate and severe drought stress on activities of SOD, POD and CAT, relative electric conductivity, and contents of MDA, soluble sugar, a
nd proline. Soluble protein content increased in Jinmai 47, Xiaoyan 22, Aikang 58, and Xinong 979, while it decreased in the other three cultivars. Grains number per spike, grain weight per spike and the 1000-grain weight significantly decreased under drought stress. Principal component analysis showed an order of drought resistance for these cultivars: Jinmai 47＞Xiaoyan 22＞Aikang 58＞Xinong 979＞Xinong 509＞Zhengmai 366＞Zhengmai 9023. |
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