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《Plant Physiology Journal》 2011, 47 (6): 607-612

Effects of Exogenous 24-Epibrassinolide on Seed Germination, Physiological Characteristics of Eggplant Seedlings under NaCl Stress

WU Xue-Xia, ZHA Ding-Shi*, ZHU Zong-Wen, LI Xian
Shanghai Key Laboratory of Protected Horticultural Technology, Horticultural Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China


The objective of this study was to investigate the effects of exogenous 24-epibrassinolide (EBR) on seed germination, seedling growth, and physiological characteristics in eggplant (Solanum melongena L.) seedlings under 150 mmol·L-1 NaCl stress. The results showed that 0.05 mg·L-1 EBR significantly alleviated the damage caused by 150 mmol·L-1 NaCl. Specifically, seed germination rate, germination potential, germination index and vigor index were increased by 8.23%, 15.91%, 17.23%, and 44.29%, respectively; plant height, root length and fresh weight were increased by 56.67%, 23.83% and 56.68%, respectively; the activities of SOD, POD, CAT and APX were increased by 13.75%, 24.00%, 28.64% and 21.46%, respectively; and contents of proline and soluble sugar were increased by 30.96% and 23.66%, respectively; while contents of MDA and O2·-producing rate were decreased by 29.58% and 14.80%, respectively. Results suggested that exogenous 0.05 mg·L-1 EBR significantly stimulated seed germination and seedling growth, alleviated oxidative damage, and elevated the salt tolerance of plant.

Key words: 24-epibrassinolide; NaCl stress; eggplant; seed germination; oxidative damage

Received 2011-03-18 Accepted 2011-03-18

Funding 上海市科技兴农重点公关项目[沪农科攻字(2009)第2-1号]、上海市自然科学基金(ZR1426800)和现代农业产业技术体系建设专向资金

*Corresponding author (E-mail: dingshizha@yahoo.com; Tel: 021-62207992)


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