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Integrated transcriptomic and metabolomic data reveal the cold stress responses molecular mechanisms of two coconut varieties

文献类型： 外文期刊

作者： Li, Jing 1 ; Wang, Fangyuan 1 ; Sayed, Md. Abu 1 ; Shen, Xiaojun 1 ; Zhou, Lixia 1 ; Liu, Xiaomei 1 ; Sun, Xiwei 1 ; Chen, Shuangyan 1 ; Wu, Yi 1 ; Lu, Lilan 1 ; Gong, Shufang 1 ; Iqbal, Amjad 1 ; Yang, Yaodong 1 ;

作者机构： 1.Coconut Res Inst, Chinese Acad Trop Agr Sci, Hainan Key Lab Trop Oil Crops Biol, Wenchang, Hainan, Peoples R China

2.Yunnan Agr Univ, Sch Trop Crops, Kunming, Yunnan, Peoples R China

3.Abdul Wali Khan Univ Mardan, Dept Food Sci & Technol, Mardan, Pakistan

关键词： coconut; varieties; cold stress; transcriptome; metabolome

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.6； 五年影响因子：6.8 ）

ISSN： 1664-462X

年卷期： 2024 年 15 卷

页码：

收录情况： SCI

摘要： Among tropical fruit trees, coconut holds significant edible and economic importance. The natural growth of coconuts faces a challenge in the form of low temperatures, which is a crucial factor among adverse environmental stresses impacting their geographical distribution. Hence, it is essential to enhance our comprehension of the molecular mechanisms through which cold stress influences various coconut varieties. We employed analyses of leaf growth morphology and physiological traits to examine how coconuts respond to low temperatures over 2-hour, 8-hour, 2-day, and 7-day intervals. Additionally, we performed transcriptome and metabolome analyses to identify the molecular and physiological shifts in two coconut varieties displaying distinct sensitivities to the cold stress. As the length of cold stress extended, there was a prominent escalation within the soluble protein (SP), proline (Pro) concentrations, the activity of peroxidase (POD) and superoxide dismutase (SOD) in the leaves. Contrariwise, the activity of glutathione peroxidase (GSH) underwent a substantial reduction during this period. The widespread analysis of metabolome and transcriptome disclosed a nexus of genes and metabolites intricately cold stress were chiefly involved in pathways centered around amino acid, flavonoid, carbohydrate and lipid metabolism. We perceived several stress-responsive metabolites, such as flavonoids, carbohydrates, lipids, and amino acids, which unveiled considerably, lower in the genotype subtle to cold stress. Furthermore, we uncovered pivotal genes in the amino acid biosynthesis, antioxidant system and flavonoid biosynthesis pathway that presented down-regulation in coconut varieties sensitive to cold stress. This study broadly enriches our contemporary perception of the molecular machinery that contributes to altering levels of cold stress tolerance amid coconut genotypes. It also unlocks several unique prospects for exploration in the areas of breeding or engineering, aiming to identifying tolerant and/or sensitive coconut varieties encompassing multi-omics layers in response to cold stress conditions.

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