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Authors
Shao, Yang Arid Land Research Center, Tottori University
An, Ping Arid Land Research Center, Tottori University Researchers DB KAKEN
Feng, Xiaohui Key Laboratory of Agricultural Water Resources, Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Muhammad, Irshad Department of Environmental Sciences, COMSATS Institute of Information Technology, University Road
Otie, Victoria Department of Soil Science, Faculty of Agriculture, Forestry and Wildlife Resources Management, University of Calabar
Li, Weiqiang State Key Laboratory of Cotton Biology, Henan Joint International Laboratory for Crop Multi‑Omics Research, School of Life Sciences, Henan University
Zheng, Yuanrun Key Laboratory of Resource Plants, Institute of Botany, Chinese Academy of Sciences
Qiman, Yunus College of Forestry and Horticulture, Xinjiang Agricultural University
Keywords
Root elongation
Cell wall loosening
Apical root
Creep
Cultivar difference
Salt stress
Abstract
Two salt-sensitive (Yongliang-15, GS-6058) and two salt-tolerant (JS-7, Xinchun-31) wheat cultivars were used to investigate the extension, extensibility (viscoelastic parameters), and chemical composition of the cell walls in their root elongation regions (apical 10 mm-long root segments), under salinity stress. The elasticity of the root cell wall, indicated by E0, significantly decreased in the salt-sensitive cultivars, whereas the E0 in the salt-tolerant cultivars was maintained at the same level as that in the non-saline condition. Root extension and the differences among cultivars were largely dependent on elastic extension, which accounts for one-half to two-thirds of the total extension. Viscosity, indicated by η0, and the plastic extension of the root cell walls did not change across the treatments and cultivars. The significant decrease in cell wall elasticity in the root elongation region was one of the factors that depressed root growth in salt-sensitive cultivars under the saline condition. The well-maintained elasticity of salt-tolerant cultivars alleviated the depression of root growth by NaCl. Cell wall elasticity was positively correlated with the relative pectin and hemicellulose I contents and negatively correlated with the relative cellulose content. Under saline conditions, the relative hemicellulose II content did not change in the salt-sensitive cultivars; however, it decreased in the salt-tolerant ones. Thus, changes in chemical composition of the cell wall were correspond with the cell wall extensibility and root growth in wheat cultivars with different degrees of salt tolerance.
Publisher
Springer Nature
Content Type
Journal Article
Link
ISSN
01676903
EISSN
15735087
Journal Title
PLANT GROWTH REGULATION
Volume
94
Issue
2
Start Page
183
End Page
193
Published Date
2021-06
Publisher-DOI
Text Version
Author
Rights
This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: https://doi.org/10.1007/s10725-021-00707-7
Citation
Shao Yang, An Ping, Feng Xiaohui, et al. Differential responses of roots for varying tolerance to salinity stress in wheat with special reference to elasticity. PLANT GROWTH REGULATION. 2021, 94, 183-193. doi:10.1007/s10725-021-00707-7
Department
Affiliated Institutes
Language
English
Web of Science Key ut
WOS:000635484100001