Effect of salt stress on fatty acid and α-tocopherol metabolism in two desert shrub species

Artemisia sphaerocephala Kraschen and Artemisia ordosiea Kraschen are widely distributed in the arid and semiarid desert regions of the northwest of China. Under salt stress, it has been known that a-tocopherol (α-T) improves membrane permeability and maintains Na⁺/K⁺ homeostasis; however, the funct...

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Bibliographic Details
Published in:Planta 2018-02, Vol.247 (2), p.499-511
Main Authors: Chen, Xiaolong, Zhang, Lijing, Miao, Xiumei, Hu, Xiaowei, Nan, Shuzhen, Wang, Jing, Fu, Hua
Format: Article
Language:English
Subjects:
Abiotic stress
Agriculture
Arid regions
Biomedical and Life Sciences
Chlorophyll
Deserts
Ecology
Electrical resistivity
Fatty acids
Forestry
Homeostasis
Jasmonic acid
Life Sciences
Linoleic acid
Linolenic acid
Lipids
Membrane permeability
Metabolism
ORIGINAL ARTICLE
Plant Sciences
Salts
Sodium chloride
Stresses
Tocopherol
Vitamin E
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Summary:Artemisia sphaerocephala Kraschen and Artemisia ordosiea Kraschen are widely distributed in the arid and semiarid desert regions of the northwest of China. Under salt stress, it has been known that a-tocopherol (α-T) improves membrane permeability and maintains Na⁺/K⁺ homeostasis; however, the function of α-T in regulating membrane components of fatty acids is unknown. In this study, 100-day-old plants of A. ordosiea and A. sphaerocephala are subjected to various NaCl treatments for 7, 14, and 21 days. Compared to A. ordosiea, A. sphaerocephala has a higher Na⁺ concentration, higher chlorophyll content and dry weight in all NaCl treatments, but lower relative electric conductivity. The stable unsaturated levels of the lipids in A. sphaerocephala may be attributed to higher level of C18:2. Under 200 mM NaCl treatment, α-T and C18:2 contents in A. sphaerocephala increase significantly, while the Na+, C18:1, C18:3 and jasmonic acid (JA) contents decrease. Moreover, α-T is positively correlated with C18:2, but negatively correlated with C18:3.
ISSN:0032-0935
1432-2048
DOI:10.1007/s00425-017-2803-8