Grafting Delays Watermel on Fruit Ripening by Altering Gene Expression of ABA Centric Phytohormone Signaling
文献类型： 外文期刊
作者： Guo, Shaogui 1 ; Sun, Honghe 1 ; Tian, Jiaxing 1 ; Zhang, Guoyu 1 ; Gong, Guoyi 1 ; Ren, Yi 1 ; Zhang, Jie 1 ; Li, Maoyin 1 ;
作者机构： 1.Beijing Acad Agr & Forestry Sci, Key Lab Biol & Genet Improvement Hort Crops North, Natl Watermelon & Melon Improvement Ctr, Beijing Key Lab Vegetable Germplasm Improvement,N, Beijing, Peoples R China
关键词： watermelon; graft; fruit development; gene expression; phytohormone
期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）
ISSN： 1664-462X
年卷期： 2021 年 12 卷
页码：
收录情况： SCI
摘要： Grafting cultivation is implemented worldwide mainly to resist abiotic and biotic stresses and is an effective method to improve watermelon production. However, grafting may affect fruit development and quality. In our experiment, pumpkin-grafted (PG) watermelon fruits developed slower and the ripening period was extended compared to self-grafted (SG) fruits. We found that the concentrations of abscisic acid (ABA) among endogenous phytohormones were dramatically reduced by pumpkin grafting. In order to understand these changes at the gene expression level, we performed a comprehensive analysis of the fruit flesh transcriptomes between PG and SG during fruit development and ripening. A total of 1,675 and 4,102 differentially expressed genes (DEGs) were identified between PG and SG. Further functional enrichment analysis revealed that these DEGs were associated with carbohydrate biosynthesis, phytohormone signaling transmission, and cell wall metabolism categories. ABA centric phytohormone signaling and fruit quality-related genes including ABA receptor, PP2C proteins, AP2-EREBP transcription factors, sucrose transporter, and carotenoid isomerase were co-expressed with fruit ripening. These results provide the valuable resource for understanding the mechanism of pumpkin grafting effect on watermelon fruit ripening and quality development.
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