文献类型： 外文期刊
作者： Gao, Jie 1 ; Dou, Tongxin 1 ; He, Weidi 1 ; Sheng, Ou 1 ; Bi, Fangcheng 1 ; Deng, Guiming 1 ; Gao, Huijun 1 ; Dong, Tao 1 ;
作者机构： 1.Guangdong Acad Agr Sci, Inst Fruit Tree Res, Key Lab South Subtrop Fruit Biol & Genet Resource, Minist Agr & Rural Affairs,Guangdong Key Lab Trop, Guangzhou 510640, Peoples R China
2.Guangdong Acad Agr Sci, Guangdong Key Lab Ornamental Plant Germplasm Inn, Guangzhou 510640, Peoples R China
3.Cornell Univ, Inst Biotechnol, Ithaca, NY 14853 USA
关键词： MaMAPK3; MaICE1; MaPOD P7; Antioxidant capacity; Cold tolerance
期刊名称：BMC PLANT BIOLOGY （ 影响因子：4.215； 五年影响因子：4.96 ）
ISSN： 1471-2229
年卷期： 2021 年 21 卷 1 期
页码：
收录情况： SCI
摘要： BackgroundBanana is a tropical fruit with a high economic impact worldwide. Cold stress greatly affects the development and production of banana.ResultsIn the present study, we investigated the functions of MaMAPK3 and MaICE1 involved in cold tolerance of banana. The effect of RNAi of MaMAPK3 on Dajiao (Musa spp. 'Dajiao'; ABB Group) cold tolerance was evaluated. The leaves of the MaMAPK3 RNAi transgenic plants showed wilting and severe necrotic symptoms, while the wide-type (WT) plants remained normal after cold exposure. RNAi of MaMAPK3 significantly changed the expressions of the cold-responsive genes, and the oxidoreductase activity was significantly changed in WT plants, while no changes in transgenic plants were observed. MaICE1 interacted with MaMAPK3, and the expression level of MaICE1 was significantly decreased in MaMAPK3 RNAi transgenic plants. Over-expression of MaICE1 in Cavendish banana (Musa spp. AAA group) indicated that the cold resistance of transgenic plants was superior to that of the WT plants. The POD P7 gene was significantly up-regulated in MaICE1-overexpressing transgenic plants compared with WT plants, and the POD P7 was proved to interact with MaICE1.ConclusionsTaken together, our work provided new and solid evidence that MaMAPK3-MaICE1-MaPOD P7 pathway positively improved the cold tolerance in monocotyledon banana, shedding light on molecular breeding for the cold-tolerant banana or other agricultural species.
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