Caffeic Acid O-Methyltransferase Gene Family in Mango (Mangifera indica L.) with Transcriptional Analysis under Biotic and Abiotic Stresses and the Role of MiCOMT1 in Salt Tolerance
文献类型： 外文期刊
作者： Wang, Huiliang 1 ; Chen, Zhuoli 1 ; Luo, Ruixiong 3 ; Lei, Chen 2 ; Zhang, Mengting 1 ; Gao, Aiping 3 ; Pu, Jinji 2 ; Zhang, He 1 ;
作者机构： 1.Hainan Univ, Minist Educ, Key Lab Green Prevent & Control Trop Plant Dis & P, Key Lab Biotechnol Salt Tolerant Crops Hainan Prov, Haikou 570228, Peoples R China
2.Chinese Acad Trop Agr Sci Environm, Plant Protect Inst, Natl Key Lab Crop Breeding Trop, Key Lab Integrated Pest Management Trop Crops, Haikou 571101, Peoples R China
3.Chinese Acad Trop Agr Sci, Minist Agr & Rural Affairs, Lab Crop Gene Resources & Germplasm Enhancement So, Natl Key Lab Trop Crop Breeding,Trop Crops Genet R, Haikou 571101, Peoples R China
关键词： COMT gene family; salt tolerance; transcriptional analysis; transient overexpression
期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.6； 五年影响因子：6.2 ）
ISSN： 1661-6596
年卷期： 2024 年 25 卷 5 期
页码：
收录情况： SCI
摘要： Caffeic acid O-methyltransferase (COMT) participates in various physiological activities in plants, such as positive responses to abiotic stresses and the signal transduction of phytohormones. In this study, 18 COMT genes were identified in the chromosome-level reference genome of mango, named MiCOMTs. A phylogenetic tree containing nine groups (I-IX) was constructed based on the amino acid sequences of the 71 COMT proteins from seven species. The phylogenetic tree indicated that the members of the MiCOMTs could be divided into four groups. Quantitative real-time PCR showed that all MiCOMT genes have particularly high expression levels during flowering. The expression levels of MiCOMTs were different under abiotic and biotic stresses, including salt and stimulated drought stresses, ABA and SA treatment, as well as Xanthomonas campestris pv. mangiferaeindicae and Colletotrichum gloeosporioides infection, respectively. Among them, the expression level of MiCOMT1 was significantly up-regulated at 6-72 h after salt and stimulated drought stresses. The results of gene function analysis via the transient overexpression of the MiCOMT1 gene in Nicotiana benthamiana showed that the MiCOMT1 gene can promote the accumulation of ABA and MeJA, and improve the salt tolerance of mango. These results are beneficial to future researchers aiming to understand the biological functions and molecular mechanisms of MiCOMT genes.
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