Time-course of ionic responses and proteomic analysis of a Tibetan wild barley at early stage under salt stress

Barley ( Hordeum vulgare L.) is well known for its relatively high salt tolerance among cereal crops. However, the genetic variation of cultivated barley becomes narrower due to continuous artificial selection and breeding processes. Compared with cultivated barley, wild barley contains wider geneti...

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Bibliographic Details
Published in:Plant growth regulation 2017, Vol.81 (1), p.11-21
Main Authors: Shen, Qiufang, Fu, Liangbo, Qiu, Long, Xue, Feng, Zhang, Guoping, Wu, Dezhi
Format: Article
Language:English
Subjects:
Agriculture
Barley
Biomedical and Life Sciences
Cereal crops
Cultivation
Genetic diversity
Grain cultivation
Hordeum vulgare
Life Sciences
Original Paper
Photosynthesis
Plant Anatomy/Development
Plant growth
Plant Physiology
Plant Sciences
Roots
Salt tolerance
Shoots
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Summary:Barley ( Hordeum vulgare L.) is well known for its relatively high salt tolerance among cereal crops. However, the genetic variation of cultivated barley becomes narrower due to continuous artificial selection and breeding processes. Compared with cultivated barley, wild barley contains wider genetic variation and abundant sources for abiotic stress tolerance, considering as an elite resource for mechanism study on salt tolerance. In this study, Tibetan wild barley accession XZ113 identified with high salt tolerance, was used to investigate ionic responses and to identify proteins involved in salt tolerance in roots and shoots at early stage of salt stress, during 48 h. Exposed to salinity, shoot growth is more sensitive than root growth. Conversely, K/Na ratio in the shoots was larger than that in the roots, and both were above 1.0. Steady-state K + flux experiment showed XZ113 had a strong K + -retaining ability under salt stress, maybe contributing to its good performance of the absolute growth rate. Proteomic results suggested that monodehydroascorbate reductase and peroxidases related to reactive oxygen species scavenging in the roots and phosphoglycerate kinase, triosephosphate isomerase and sedoheptulose-1,7-bisphosphatase associated with photosynthesis and metabolisms in the shoots, played important roles in salt tolerance at early stage of salinity in wild barley.
ISSN:0167-6903
1573-5087
DOI:10.1007/s10725-016-0180-0