[Salt Stress Response in Arabidopsis thaliana Plants with Defective Jasmonate Signaling].
The effects of exogenous jasmonic acid (JA) on antioxidant enzymes in four-week-old leaves of wild-type Arabidopsis thaliana L. (Columbia-0) and jin1 (jasmonate insensitive 1) mutant plants with defective jasmonate signaling were investigated under normal conditions and under salt stress (200 mM NaCl, 24 h). The wild-type plants responded to JA by an increase in the activities of Cu/Zn superoxide dismutase, catalase, and guaiacol peroxidase, while there was no change in the case of the mutant plants. In response to the salt stress of both the wild-type and mutant genotypes, the activities of superoxide dismutase, catalase, and guaiacol peroxidase were unchanged, decreased, and increased, respectively. The JA-treated wild type plants showed the highest activity of all three enzymes as compared with the mutant plants. Salinity caused a decrease in chlorophyll content in the wild-type and jin 1 plants. Preliminary JA treatment of the Col-0 plants resulted in a normal content of photosynthetic pigments after the salt stress, while the positive JA effect was insignificant in the jin 1 mutants. It was concluded that the MYC2/JIN 1 protein is involved in the JA signal transduction and plant adaptation to salt stress.
T O
TO
Yastreb
Yu E
YE
Kolupayev
A A
AA
Shvidenko
A A
AA
Lugovaya
A P
AP
Dmitriev
D000975:Antioxidants / Q000737:chemistry / Q000378:metabolism; D017360:Arabidopsis / Q000187:drug effects* / Q000235:genetics / Q000378:metabolism; D002374:Catalase / Q000096:biosynthesis; D003517:Cyclopentanes / Q000378:metabolism*; D018506:Gene Expression Regulation, Plant / Q000187:drug effects; D054883:Oxylipins / Q000378:metabolism*; D009195:Peroxidase / Q000096:biosynthesis; D054712:Salinity; D015398:Signal Transduction / Q000187:drug effects; D012965:Sodium Chloride / Q000737:chemistry*; D013312:Stress, Physiological; D013482:Superoxide Dismutase / Q000096:biosynthesis
D000975:Antioxidants; D003517:Cyclopentanes; D054883:Oxylipins; D012965:Sodium Chloride; C011006:jasmonic acid; C121048:guaiacol peroxidase; D002374:Catalase; D009195:Peroxidase; D013482:Superoxide Dismutase