Salt and alkali stresses effects on contents of organic acids components in wheat seedlings

• Published in: Journal of plant nutrition Vol. 36; no. 7; pp. 1056 - 1064
• Main Authors: Xu, Ankai, Mu, Chunsheng, Li, Xiaoyu, Lin, Jixiang, Li, Yanpeng, Mu, Yongguang
• Format: Journal Article
• Language: English
• Published: Philadelphia, NJ Taylor & Francis Group 01.01.2013; Taylor & Francis; Taylor & Francis Ltd
• Subjects: Acids; Agronomy. Soil science and plant productions; alkali stress; alkalinity; Biological and medical sciences; biomass; cell membranes; Chemical, physicochemical, biochemical and biological properties; citrates; Economic plant physiology; Fundamental and applied biological sciences. Psychology; growth retardation; malate; malates; Metabolism; Metabolism. Physicochemical requirements; Nutrition. Photosynthesis. Respiration. Metabolism; organic acid components; Organic matter; Physics, chemistry, biochemistry and biology of agricultural and forest soils; physiological response; Plant physiology and development; roots; Salt; salt stress; seedlings; shoots; sodium bicarbonate; sodium carbonate; sodium chloride; sodium sulfate; Soil science; wheat; Monocotyledones; Vegetals; Organic matter; Plant juvenile growth stage; roots; Organic acids; Stress; alkali stress; Salt; Triticum; Malate; Gramineae; Plant nutrition; Content; Angiospermae; Carboxylate; Spermatophyta; Developmental stage; Chemical properties; Alkalinity; C3-Type; organic acid components; Organic compounds; shoots
• ISSN: 1532-4087; 0190-4167; 1532-4087
• DOI: 10.1080/01904167.2013.766888

Effects of salt [sodium chloride (NaCl): sodium sulfate (Na₂SO₄)] and alkali [sodium bicarbonate (NaHCO₃): sodium carbonate (Na₂CO₃)] stresses on biomass and the contents of organic acids (OAs) components in wheat shoots and roots were compared. Both stresses inhibited the growth of wheat seedlings, the effect on roots biomass was higher than that on shoots, and more severe for alkali than for salt stress. Compared to salt stress, OAs are the special physiological responses of wheat seedlings to alkali stress. The total OAs contents in shoots increased significantly with increasing alkalinity, but only increased as alkali stress supply increased from 0 to 80 mM in roots, then decreased. Roots were more sensitive than shoots responding to alkali stress. High alkalinity destroyed cell membrane of root leading to organic acids efflux from roots. Among the OAs components, citrate and malate were the key components in wheat shoots and roots when responding to alkali stress.