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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

 

Abstract:
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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