2009•Jiangsu nongye xuebaoRequires access

Effects of Microorganism-sourced ABA on the Growth and Some Physiological Indexes of Pepper Seedling under Salt Stress

Tang Risheng, Huang YiHong, Tang XianHong, Zhong Yu, Yu YongZhu, Tong Hong-yu

Abstract

Soil secondary salinization has become one of the important factors which adversely affects the protected vegetable growth and yield.The role of microorganism-sourced abscisic acid(ABA) on the growth and some physiological indexes of pepper seedlings(Sujiao No.5) under salt(0.6% NaCl) stress were investigated.ABA could effectively enhance the ability of pepper seedling resistance to salt stress.ABA not only enhanced superoxide dismutase(SOD) activity and delayed the increasing of malondialdehyde(MDA) content in the leaves of pepper seedling during salt stress,but increased the contents of soluble sugar,proline,ascorbic acid(AsA),and glutathione(GSH) significantly in ABA-treated seedling leaves in comparison with those of control.

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Key concepts: Seedling, Proline, Pepper, Malondialdehyde, Sugar, Abscisic acid, Superoxide dismutase, Ascorbic acid