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Effects of high-temperature stress on gene expression related to photosynthesis in two jujube (Ziziphus jujuba Mill.) varieties

文献类型： 外文期刊

作者： Yang, Lei 1 ; Yang, Xiaojuan 3 ; Shen, Bingqi 3 ; Jin, Juan 3 ; Li, Lili 3 ; Fan, Dingyu 3 ; Xiaokelaiti, Subina 3 ; Hao, Qing 3 ; Niu, Jianxin 1 ;

作者机构： 1.Shihezi Univ, Coll Agr, Dept Hort, Shihezi 832003, Xinjiang, Peoples R China

2.Xinjiang Prod & Construct Corps Key Lab Special Fr, Shihezi, Xinjiang, Peoples R China

3.Xinjiang Acad Agr Sci, Inst Hort Crops, Urumqi 830091, Xinjiang, Peoples R China

4.Sci Observing & Expt Stn Pomol Xinjiang, State Key Lab Genet Improvement & Germplasm Innova, Key Lab Genome Res & Genet Improvement Xinjiang Ch, Urumqi, Xinjiang, Peoples R China

关键词： High-temperature; jujube; photosynthesis; microstructure; photosynthetic gene

期刊名称：PLANT SIGNALING & BEHAVIOR （ 影响因子：2.9； 五年影响因子：2.9 ）

ISSN： 1559-2316

年卷期： 2024 年 19 卷 1 期

页码：

收录情况： SCI

摘要： Elevated temperatures critically impact crop growth, development, and yield, with photosynthesis being the most temperature-sensitive physiological process in plants. This study focused on assessing the photosynthetic response and genetic adaptation of two different heat-resistant jujube varieties 'Junzao' (J) and 'Fucuimi' (F), to high-temperature stress (42 degrees C Day/30 degrees C Night). Comparative analyses of leaf photosynthetic indices, microstructural changes, and transcriptome sequencing were conducted. Results indicated superior high-temperature adaptability in F, evidenced by alterations in leaf stomatal behavior - particularly in J, where defense cells exhibited significant water loss, shrinkage, and reduced stomatal opening, alongside a marked increase in stomatal density. Through transcriptome sequencing 13,884 differentially expressed genes (DEGs) were identified, significantly enriched in pathways related to plant-pathogen interactions, amino acid biosynthesis, starch and sucrose metabolism, and carbohydrate metabolism. Key findings include the identification of photosynthetic pathway related DEGs and HSFA1s as central regulators of thermal morphogenesis and heat stress response. Revealing their upregulation in F and downregulation in J. The results indicate that these genes play a crucial role in improving heat tolerance in F. This study unveils critical photosynthetic genes involved in heat stress, providing a theoretical foundation for comprehending the molecular mechanisms underlying jujube heat tolerance.

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