Acceleration of Carbon Fixation in Chilling-Sensitive Banana under Mild and Moderate Chilling Stresses
文献类型： 外文期刊
作者： Liu, Jing 1 ; Takac, Tomas 2 ; Yi, Ganjun 3 ; Chen, Houbin 1 ; Wang, Yingying 1 ; Meng, Jian 1 ; Yuan, Weina 1 ; Tan, Yeh 1 ;
作者机构： 1.South China Agr Univ, Dept Pomol, Coll Hort, Guangzhou 510642, Peoples R China
2.Palacky Univ, Ctr Reg Hana Biotechnol & Agr Res, Dept Cell Biol, Fac Sci, Olomouc 78371, Czech Republic
3.Guangdong Acad Agr Sci, Inst Fruit Tree Res, Guangdong Prov Key Lab Trop & Subtrop Fruit Tree, Guangzhou 510640, Peoples R China
关键词： banana (Musa spp; AAA); mild chilling; carbon fixation; photosynthesis; phosphoenolpyruvate carboxylases; immunofluorescence labeling
期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.923； 五年影响因子：6.132 ）
ISSN：
年卷期： 2020 年 21 卷 23 期
页码：
收录情况： SCI
摘要： Banana is one of the most important food and fruit crops in the world and its growth is ceasing at 10-17 degrees C. However, the mechanisms determining the tolerance of banana to mild (>15 degrees C) and moderate chilling (10-15 degrees C) are elusive. Furthermore, the biochemical controls over the photosynthesis in tropical plant species at low temperatures above 10 degrees C is not well understood. The purpose of this research was to reveal the response of chilling-sensitive banana to mild (16 degrees C) and moderate chilling stress (10 degrees C) at the molecular (transcripts, proteins) and physiological levels. The results showed different transcriptome responses between mild and moderate chilling stresses, especially in pathways of plant hormone signal transduction, ABC transporters, ubiquinone, and other terpenoid-quinone biosynthesis. Interestingly, functions related to carbon fixation were assigned preferentially to upregulated genes/proteins, while photosynthesis and photosynthesis-antenna proteins were downregulated at 10 degrees C, as revealed by both digital gene expression and proteomic analysis. These results were confirmed by qPCR and immunofluorescence labeling methods. Conclusion: Banana responded to the mild chilling stress dramatically at the molecular level. To compensate for the decreased photosynthesis efficiency caused by mild and moderate chilling stresses, banana accelerated its carbon fixation, mainly through upregulation of phosphoenolpyruvate carboxylases.
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