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Functional validation of AaCaM3 response to high temperature stress in Amorphophallus albus

文献类型： 外文期刊

作者： Niu, Yi 1 ; Zhou, Zixuan 2 ; Yue, Zhenyu 2 ; Zhang, Xiaofei 2 ; Jiang, Xuekuan 4 ; Hu, Lingyu 2 ; Liu, Quanshuo 1 ; Zhang, Xu 1 ; Dong, Kun 5 ;

作者机构： 1.Southwest Univ, Yibin Acad, Yibin, Peoples R China

2.Southwest Univ, Coll Hort & Landscape Architecture, Chongqing, Peoples R China

3.Southwest Univ, Key Lab Hort Sci Southern Mountainous Reg, Minist Educ, Chongqing, Peoples R China

4.Chongqing SINO Konjac Biotechnol Co Ltd, Chongqing, Peoples R China

5.Yunnan Acad Agr Sci, Inst Fuyuan Konjac, Qujing, Peoples R China

关键词： Amorphophallus Albus; AaCaM3; Promoter-protein interaction; Heat stress

期刊名称：BMC PLANT BIOLOGY （ 影响因子：4.3； 五年影响因子：5.2 ）

ISSN： 1471-2229

年卷期： 2024 年 24 卷 1 期

页码：

收录情况： SCI

摘要： Amorphophallus is a perennial monocotyledonous herbaceous plant native to the southwestern region of China, widely used in various fields such as food processing, biomedicine and chemical agriculture. However, Amorphophallus is a typical thermolabile plant, and the continuous high temperature in summer have seriously affected the growth, development and economic yield of Amorphophallus in recent years. Calmodulin (CaM), a Ca2+ sensor ubiquitous in eukaryotes, is the most important multifunctional receptor protein in plant cells, which affects plant stress resistance by participating in the activities of a variety of signaling molecules. In this study, the key gene AaCaM3 for the Ca2+-CaM regulatory pathway was obtained from A. albus, the sequence analysis confirmed that it is a typical calmodulin. The qRT-PCR results demonstrated that with the passage of heat treatment time, the expression of AaCaM3 was significantly upregulated in A. albus leaves. Subcellular localization analysis revealed that AaCaM3 localized on the cytoplasm and nucleus. Meanwhile, heterologous transformation experiments have shown that AaCaM3 can significantly improve the heat tolerance of Arabidopsis under heat stress. The promoter region of AaCaM3 was sequenced 1,338 bp by FPNI-PCR and GUS staining assay showed that the promoter of AaCaM3 was a high-temperature inducible promoter. Yeast one-hybrid analysis and Luciferase activity reporting system analysis showed that the AaCaM3 promoter may interact with AaHSFA1, AaHSFA2c, AaHSP70, AaDREB2a and AaDREB2b. In conclusion, this study provides new ideas for further improving the signal transduction network of high-temperature stress in Amorphophallus.

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