Journal
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Volume 22, Issue 18, Pages -Publisher
MDPI
DOI: 10.3390/ijms22189786
Keywords
sweet potato; Ipomoea trifida; Ipomoea triloba; JAZ; tissue-specific expression; hormone treatment; abiotic stress
Funding
- Beijing Natural Science Foundation [6212017]
- National Key R&D Program of China [2019YFD1001301/2019YFD1001300]
- National Natural Science Foundation of China [31771856, 31901584]
- China Agriculture Research System of MOF [CARS-10]
- Beijing Food Crops Innovation Consortium Program [BAIC09-2021]
- Chinese Universities Scientific Fund [2020TC085]
- China Agriculture Research System of MARA [CARS-10]
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This study systematically investigated and compared the JAZ proteins of sweet potato and its two diploid relatives, revealing that they play different key roles in growth and development, hormone crosstalk, and responses to abiotic stress.
Jasmonate ZIM-domain (JAZ) proteins are key repressors of a jasmonic acid signaling pathway. They play essential roles in the regulation of plant growth and development, as well as environmental stress responses. However, this gene family has not been explored in sweet potato. In this study, we identified 14, 15, and 14 JAZs in cultivated hexaploid sweet potato (Ipomoea batatas, 2n = 6x = 90), and its two diploid relatives Ipomoea trifida (2n = 2x = 30) and Ipomoea triloba (2n = 2x = 30), respectively. These JAZs were divided into five subgroups according to their phylogenetic relationships with Arabidopsis. The protein physiological properties, chromosome localization, phylogenetic relationship, gene structure, promoter cis-elements, protein interaction network, and expression pattern of these 43 JAZs were systematically investigated. The results suggested that there was a differentiation between homologous JAZs, and each JAZ gene played different vital roles in growth and development, hormone crosstalk, and abiotic stress response between sweet potato and its two diploid relatives. Our work provided comprehensive comparison and understanding of the JAZ genes in sweet potato and its two diploid relatives, supplied a theoretical foundation for their functional study, and further facilitated the molecular breeding of sweet potato.
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