Plant Soil Environ., 2017, 63(8):348-354 | DOI: 10.17221/329/2017-PSE

Responses of barley Albina and Xantha mutants deficient in magnesium chelatase to soil salinityOriginal Paper

Zhiyu ZUO1, Xiangnan LI*,2,3, Chao XU1, Junjie YANG1, Xiancan ZHU2, Shengqun LIU2, Fengbin SONG2, Fulai LIU3, Hanping MAO*,1
1 Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education/High-tech Key Laboratory of Agricultural Equipment and Intelligence of Jiangsu Province, School of Agricultural Equipment and Engineering, Jiangsu University, Zhenjiang, P.R. China
2 Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, P.R. China
3 Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Taastrup, Denmark

Soil salinity reduces the plant growth and grain yield in barley. The barley mutants Albina and Xantha, deficient in magnesium chelatase, represent a suitable model object for analysis of the roles of chloroplast in salt stress response. Spring barley (Hordeum vulgare cv. Svalofs Bonus) and four nonallelic Albina (alb-e16 and alb-f17) and Xantha (xan-s46 and xan-b12) mutants were used to investigate the effects of soil salinity on physiological traits of plants. Under salt stress, larger reduction in stomatal conductance and higher Na concentration was found in Albina and Xantha mutants compared with wild type (WT). In addition, the Albina and Xantha mutants had lower capacity of reactive oxygen species (ROS) scavenging while higher ROS generation rate compared with WT, exposed to soil salinity. Therefore, the limitations in chloroplast development affected Na+/K+ homeostasis and decreased the oxygen scavenging capacity, hence affecting the salt tolerance in barley.

Keywords: stress condition; ion toxicity; chlorophyll biosynthesis; sugars

Published: August 31, 2017  Show citation

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ZUO Z, Xiangnan L, Chao X, YANG J, ZHU X, LIU S, et al.. Responses of barley Albina and Xantha mutants deficient in magnesium chelatase to soil salinity. Plant Soil Environ. 2017;63(8):348-354. doi: 10.17221/329/2017-PSE.
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