Differential roles of melatonin in plant-host resistance and pathogen suppression in cucurbits

Journal of Pineal Research
Mihir Kumar MandalChandrasekar Kousik

Abstract

Since the 1950s, research on the animal neurohormone, melatonin, has focused on its multiregulatory effect on patients suffering from insomnia, cancer, and Alzheimer's disease. In plants, melatonin plays major role in plant growth and development, and is inducible in response to diverse biotic and abiotic stresses. However, studies on the direct role of melatonin in disease suppression and as a signaling molecule in host-pathogen defense mechanism are lacking. This study provides insight on the predicted biosynthetic pathway of melatonin in watermelon (Citrullus lanatus), and how application of melatonin, an environmental-friendly immune inducer, can boost plant immunity and suppress pathogen growth where fungicide resistance and lack of genetic resistance are major problems. We evaluated the effect of spray-applied melatonin and also transformed watermelon plants with the melatonin biosynthetic gene SNAT (serotonin N-acetyltransferase) to determine the role of melatonin in plant defense. Increased melatonin levels in plants were found to boost resistance against the foliar pathogen Podosphaera xanthii (powdery mildew), and the soil-borne oomycete Phytophthora capsici in watermelon and other cucurbits. Further, transcriptomic d...Continue Reading

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Citations

Nov 23, 2019·Journal of Receptor and Signal Transduction Research·Guanqun Ma, Yingwu Liu
Aug 1, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Yang YuZhiwei Zhao
Jul 28, 2019·The Plant Journal : for Cell and Molecular Biology·Cheng LiJinhong Chen
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Mar 29, 2020·Food Chemistry·Su-Yan WangPedro Laborda
Jul 13, 2021·Frontiers in Plant Science·Susan J Murch, Lauren A E Erland
Jun 25, 2021·Plant Physiology and Biochemistry : PPB·Yandi WuChonghuai Liu
Aug 16, 2021·Journal of Pineal Research·Shuxin LiXiangnan Li

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