Physiological and Biochemical Response to Drought Stress in Seedling Stages and Drought-Resistance Evaluation of Sweet Tamarind Varieties

ZHAO Yi-he; LI Jian-bin; YANG Shi-yu; CHEN Shu-ying; XI Cong-fang; LI Ti-chu

The physiological and biochemical indexes such as protoplasmic membrane penetrability (PMP), malondialdehyde (MDA) content, osmoticum content, activities of protective enzymes, leaf relative water content (LRWC) and chlorophyll content (CHLC) in leaves of three Sweet Tamarind varieties of PRAKAYTONG, SRITONG, and SRITONGBAO were measured under constantly drought stress, and then the drought resistance was evaluated by drought-resistant coefficients and subordinate function. The result showed that with the development of constantly drought stress, the PMP, MDA content, proline content, soluble sugar content and soluble protein content were increased, the activities of superoxide dismutase and peroxidase increased in the beginning and decreased at last, and the LRWC and CHLC decreased in leaves of the three kinds of Sweet Tamarind. The comprehensive evaluation result by drought-resistant coefficients and subordinate function methods showed that the order of drought resistance was PRAKAYTONG > SRITONGBAO > SRITONG.

1. Research Institute of Resources Insects, Chinese Academy of Forestry, Kunming 650224, Yunnan, China

2. Yunnan Academy of Forestry, Kunming 650201, Yunnan, China

3. Faculty of Agriculture, Yunnan Agricultural University, Kunming 650201, Yunnan, China

4. Yuanjiang Experiment Station, Research Institute of Resources Insects, Chinese Academy of Forestry, Yuanjiang 653300, Yunnan, China

Received Date: 2012-05-27

Available Online: 2012-10-11

Abstract: The physiological and biochemical indexes such as protoplasmic membrane penetrability (PMP), malondialdehyde (MDA) content, osmoticum content, activities of protective enzymes, leaf relative water content (LRWC) and chlorophyll content (CHLC) in leaves of three Sweet Tamarind varieties of PRAKAYTONG, SRITONG, and SRITONGBAO were measured under constantly drought stress, and then the drought resistance was evaluated by drought-resistant coefficients and subordinate function. The result showed that with the development of constantly drought stress, the PMP, MDA content, proline content, soluble sugar content and soluble protein content were increased, the activities of superoxide dismutase and peroxidase increased in the beginning and decreased at last, and the LRWC and CHLC decreased in leaves of the three kinds of Sweet Tamarind. The comprehensive evaluation result by drought-resistant coefficients and subordinate function methods showed that the order of drought resistance was PRAKAYTONG > SRITONGBAO > SRITONG.

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Reference (24)

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Physiological and Biochemical Response to Drought Stress in Seedling Stages and Drought-Resistance Evaluation of Sweet Tamarind Varieties

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