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Integrative physiological and transcriptome analyses elucidate the effect of shading during the grain-filling stage of wheat (Triticum aestivum) cv. ZY96-3

文献类型： 外文期刊

作者： Li, Tao 1 ; Arif, Muhammad 1 ; Wang, Zhongni 3 ; Shi, Guanyin 1 ; Aljumaiah, Lulwah Zeyad 4 ; Xu, Ling 1 ; Ren, Mingjian 1 ; Xu, Ruhong 1 ; Li, Luhua 1 ;

作者机构： 1.Guizhou Univ, Coll Agr, Guiyang 550025, Peoples R China

2.Guizhou Sub Ctr Natl Wheat Improvement Ctr, Guiyang 550025, Peoples R China

3.Guizhou Acad Agr Sci, Guizhou Rice Res Inst, Guiyang 550006, Peoples R China

4.Univ Hail, Coll Sci, Dept Biol Sci, Hail 2440, Saudi Arabia

关键词： carbon fixation; differentially expressed genes; grain filling; photosynthesis; shading; transcriptomic analysis; wheat; yield

期刊名称：FUNCTIONAL PLANT BIOLOGY （ 影响因子：2.7； 五年影响因子：3.0 ）

ISSN： 1445-4408

年卷期： 2025 年 52 卷 4 期

页码：

收录情况： SCI

摘要： Shading plays an important role in determining nutrient content and yield fo wheat (Triticum aestivum). However, the genetic mechanism underlying the effects of shading treatment on grain filling remains unclear. Therefore, we performed phenotypic and transcriptome analyses on wheat cv. ZY96-3 during grain development under normal and shaded conditions. Shading resulted in a significant decrease in grain size and 1000-grain weight. Correlation analysis revealed the strong effect of shading on the mean and maximum grain-filling rate and secondary grain-filling parameters R2 and R3. And shading reduced starch content and starch-related enzyme activity (including granule-bound starch synthase and soluble starch synthase). Transcriptomic analyses showed that shading mainly affected pathways related to photosynthetic antenna proteins, carbon fixation in photosynthetic organisms, and starch and sucrose metabolism. Sixteen genes related to photosynthetic antenna protein and carbon fixation pathways were first upregulated and then downregulated; whereas all differentially expressed genes (PetC, Fd, LFNR1, LFNR2, PC, PsbO, PsaG, and PSB28) in the photosynthetic antenna protein pathway belonged to electron transport chain proteins. We found that shading treatment affects the physiological and molecular properties of grain development during the grain-filling stage. This study reveals new candidate genes (such as TaLFNR1-7A and TaFd-7A) for breeding wheat varieties with high photosynthetic efficiency in regions with insufficient light intensity.

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