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Unraveling the regulatory role of MYC2 on ASMT gene expression in wheat: Implications for melatonin biosynthesis and drought tolerance
Department of Agriculture and Natural Resources, Higher Education Center of Eghlid, Iran.
University of Skövde, School of Bioscience. University of Skövde, Systems Biology Research Environment. (Translationell Bioinformatik, Translational Bioinformatics)ORCID iD: 0000-0003-1837-429X
Department of Plant Production and Genetics, College of Agricultural Engineering, Isfahan University of Technology, Iran.
2023 (English)In: Physiologia Plantarum, ISSN 0031-9317, E-ISSN 1399-3054, Vol. 175, no 5, article id e14015Article in journal (Refereed) Published
Abstract [en]

Recognized for its multifaceted functions, melatonin is a hormone found in both animals and plants. In the plant kingdom, it plays diverse roles, regulating growth, development, and stress responses. Notably, melatonin demonstrates its significance by mitigating the effects of abiotic stresses like drought. However, understanding the precise regulatory mechanisms controlling melatonin biosynthesis genes, especially during monocots' response to stresses, requires further exploration. Seeking to understand the molecular basis of drought stress tolerance in wheat, we analyzed RNA-Seq libraries of wheat exposed to drought stress using bioinformatics methods. In light of our findings, we identified that the Myelocytomatosis oncogenes 2 (MYC2) transcription factor is a hub gene upstream of a main melatonin biosynthesis gene, N-acetylserotonin methyltransferase (ASMT), in the wheat drought response-gene network. Promoter analysis of the ASMT gene suggested that it might be a target gene of MYC2. We conducted a set of molecular and physiochemical assays along with robust machine learning approaches to elevate those findings further. MYC2 and ASMT were co-regulated under Jasmonate, drought, and a combination of them in the leaf tissues of wheat was detected. A meaningful correlation was observed among gene expression profiles, melatonin contents, photosynthetic activities, antioxidant enzyme activities, H2O2 levels, and plasma membrane damage. The results indicated an evident relationship between jasmonic acid and the melatonin biosynthesis pathway. Moreover, it seems that the MYC2-ASMT module might contribute to wheat drought tolerance by regulating melatonin contents. 

Place, publisher, year, edition, pages
John Wiley & Sons, 2023. Vol. 175, no 5, article id e14015
National Category
Bioinformatics and Systems Biology Genetics
Research subject
Bioinformatics
Identifiers
URN: urn:nbn:se:his:diva-23212DOI: 10.1111/ppl.14015ISI: 001059267900001Scopus ID: 2-s2.0-85169545506OAI: oai:DiVA.org:his-23212DiVA, id: diva2:1797319
Note

© 2023 Scandinavian Plant Physiology Society.

Correspondence: Roohollah Shamloo-Dashtpagerdi, Department of Agriculture and Natural Resources, Higher Education Center of Eghlid, Eghlid, Iran. Email:shamloo.r@gmail.com

We acknowledge support from the department of Agriculture and Natural Resources, the Higher Education Center of Eghlid.

Available from: 2023-09-14 Created: 2023-09-14 Last updated: 2023-12-19Bibliographically approved

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Lindlöf, Angelica

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