Enhanced oxidative stress in the jasmonic acid-deficient tomato mutant def-1 exposed to NaCl stress

Journal of Plant Physiology
Ibrahim Abouelsaad, Sylvie Renault

Abstract

Jasmonic acid (JA) has been mostly studied in responses to biotic stresses, such as herbivore attack and pathogenic infection. More recently, the involvement of JA in abiotic stresses including salinity was highlighted; yet, its role in salt stress remained unclear. In the current study, we compared the physiological and biochemical responses of wild-type (WT) tomato (Solanum lycopersicum) cv Castlemart and its JA-deficient mutant defenseless-1 (def-1) under salt stress to investigate the role of JA. Plant growth, photosynthetic pigment content, ion accumulation, oxidative stress-related parameters, proline accumulation and total phenolic compounds, in addition to both enzymatic and non-enzymatic antioxidant activities, were measured in both genotypes after 14 days of 100 mM NaCl treatment. Although we observed in both genotypes similar growth pattern and sodium, calcium and potassium levels in leaves under salt stress, def-1 plants exhibited a more pronounced decrease of nitrogen content in both leaves and roots and a slightly higher level of sodium in roots compared to WT plants. In addition, def-1 plants exposed to salt stress showed reactive oxygen species (ROS)-associated injury phenotypes. These oxidative stress symptoms ...Continue Reading

Citations

Mar 1, 2019·International Journal of Molecular Sciences·Seyed Abdollah HosseiniJean-Claude Yvin
Feb 26, 2020·International Journal of Molecular Sciences·Jia WangMinhui Li
Jul 8, 2020·International Journal of Molecular Sciences·Jiang XiongXiaopeng Lu
Oct 10, 2020·Plant Cell Reports·Ali RazaMirza Hasanuzzaman
May 17, 2021·Plant Physiology and Biochemistry : PPB·Aman Deep Raju, Sheo Mohan Prasad
Aug 10, 2018·Journal of Agricultural and Food Chemistry·Shujuan ZhangLin Shen

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