Journal
PLANTS-BASEL
Volume 11, Issue 7, Pages -Publisher
MDPI
DOI: 10.3390/plants11070979
Keywords
abiotic stress; ethylene; germination; jasmonic acid; oxylipins; phytohormone; polyunsaturated fatty acids
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Funding
- Council of Scientific and Industrial Research (CSIR, New Delhi, India)
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Lipoxygenases (LOXs) are widely distributed enzymes in plants and animals that catalyze the oxidation of polyunsaturated fatty acids. They play crucial roles in the biosynthesis of jasmonic acid, as well as defense responses against biotic and abiotic stress.
Lipoxygenases (LOXs), naturally occurring enzymes, are widely distributed in plants and animals. LOXs can be non-sulfur iron, non-heme iron, or manganese-containing dioxygenase redox enzymes. LOXs catalyze the oxidation of polyunsaturated fatty acids into fatty acid hydroperoxides. Linolenic acid, a precursor in the jasmonic acid (JA) biosynthesis, is converted to 12-oxo-phytodienoic acid through oxygenation with LOX, allene oxide synthase, and allene oxide cyclase. Moreover, JA participates in seed germination, fruit ripening, senescence, and many other physio-biochemical processes. LOXs also play crucial roles in defense responses against biotic stress, i.e., insects, pests, pathogenic attacks, and abiotic stress, such as wounding, UV-rays, extreme temperature, oxidative stress, and drought.
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