Journal of Integrative Agriculture ›› 2025, Vol. 24 ›› Issue (12): 4515-4527.DOI: 10.1016/j.jia.2025.04.008

• • 上一篇    下一篇

全基因组关联分析定位苦荞FtAUR3增强植物的抗盐性

  

  • 收稿日期:2025-01-20 修回日期:2025-04-03 接受日期:2025-03-10 出版日期:2025-12-20 发布日期:2025-11-13

Genome-wide association analysis locates FtAUR3 in Tartary buckwheat that contributes to enhance plant salt resistance

Xiang Lu1, 2*, Qian Zuo2*, Md. Nurul Huda2, Yaliang Shi2, Guangsheng Li2, Xiangru Wang2, Yawen Xiao2, Muhammad Khurshid3, Tanzim Jahan2, Namraj Dhami4, Dhurva Prasad Gauchan5, Md. Arfan Ali6, Jianping Cheng1, Yu Meng7, Jingjun Ruan1#, Meiliang Zhou2#   

  1. 1 College of Agriculture, Guizhou University, Guiyang 550025, China

    2 Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China

    3 School of Biochemistry and Biotechnology, University of the Punjab, Lahore 54590, Pakistan

    4 School of Health and Allied Sciences, Faculty of Health Sciences, Pokhara University, Kaski 33700 , Nepal

    5 Department of Biotechnology, School of Science, Kathmandu University, Dhulikhel 45200, Nepal

    6 Department of Horticulture, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

    7 Country College of Landscape Architecture and Tourism, Hebei Agricultural University, Baoding 071001, China

  • Received:2025-01-20 Revised:2025-04-03 Accepted:2025-03-10 Online:2025-12-20 Published:2025-11-13
  • About author:#Correspondence Meiliang Zhou, E-mail: zhoumeiliang@caas.cn; Jingjun Ruan, E-mail: jjruan@gzu.edu.cn * These authors contributed equally to this study.
  • Supported by:

    This research was supported by the Asian Cooperation Fund Project (102125241610090000029), the National Key R&D Program of China (2019YFD1001300 and 2019YFD1001305), the Natural Science Foundation of Hebei Province, China (C2023204097) and the National Natural Science Foundation of China (31560578).

PDF

摘要：

荞麦（Fagopyrum tataricum）是一种未充分利用的孤儿作物，具有重要的营养和药用价值，且对逆境有较好的耐受性。然而，这种环保作物对盐胁迫敏感，盐胁迫会导致水分流失、气孔关闭，影响光合作用和代谢，降低荞麦的产量和质量。因此，了解荞麦的盐胁迫耐受机制至关重要。在本研究中，我们通过全基因组关联分析（GWAS）确定了在第2号染色体上包含35个候选基因的位点，这个位点与荞麦的盐耐受性显著相关。转录组分析表明，丝氨酸/苏氨酸蛋白激酶 Aurora-3（FtAUR3） 家族基因在盐胁迫下上调表达。在 FtAUR3 启动子中单核苷酸的缺失会导致 FtAUR3 表达增加，从而增强荞麦对盐的耐受性。FtAUR3 在荞麦毛状根中的过表达导致了类黄酮的积累，包括芦丁和肉桂酸，并在盐胁迫下诱导了类黄酮生物合成基因 （如PAL、C4H、F3H和F3’H） 的表达。此外，过表达 FtAUR3 的拟南芥相较于野生型拟南芥增强了盐耐受基因 （SOS1、AVP1等） 的表达，增强了植物对盐胁迫的耐受性。同时，在盐胁迫下，FtAUR3 显著提高了 ROS 通路成分的水平，包括超氧化物歧化酶、过氧化氢酶和过氧化物酶，进而改善植物的盐耐受性。另外，我们证明了 FtAUR3 与 ROS 通路中的关键酶 FtGAPB 相互作用，提出了 FtAUR3 参与 ROS 信号的潜在机制。综合这些结果，证实了 FtAUR3 在荞麦耐盐胁迫中可能发挥重要的积极作用。


Abstract:

Tartary buckwheat (Fagopyrum tataricum), an underutilized pseudocereal, possesses significant nutritional and pharmaceutical properties and demonstrates resistance to drought and nutrient deficiency.  However, this environmentally sustainable crop exhibits sensitivity to salt stress, which can induce water loss, stomatal closure, impair photosynthesis and metabolism, and diminish yield and quality of Tartary buckwheat.  Understanding the mechanisms of salt stress tolerance in buckwheat is therefore crucial.  This study identified a locus containing 35 candidate genes on chromosome 2 that shows significant association with salt tolerance of Tartary buckwheat through genome-wide association analysis (GWAS).  Transcriptome analysis demonstrated that the serine/threonine-protein kinase Aurora-3 (FtAUR3) family gene exhibited upregulation in response to salt stress.  A single nucleotide deletion in the FtAUR3 promoter results in elevated FtAUR3 expression and enhanced salt tolerance in Tartary buckwheat.  Overexpression of FtAUR3 in buckwheat hairy roots promotes the accumulation of flavonoids, including rutin and cinnamic acid, while inducing the expression of flavonoid biosynthesis genes, such as PAL, C4H, F3H, and F3´H, under salt stress.  Additionally, overexpression of FtAUR3 in Arabidopsis thaliana induced the expression of salt-resistant genes (salt-resistant genes (SOS1), AVP1, etc.) and enhanced salt tolerance compared to wild type plants.  Under salt stress, FtAUR3 significantly enhances the levels of reactive oxygen species pathway components, including superoxide dismutase, catalase, and peroxidase, thereby improving plant salt tolerance.  The study demonstrated that FtAUR3 interacts with the critical enzyme FtGAPB in the reactive oxygen species (ROS) pathway, suggesting a potential mechanism through which FtAUR3 contributes to ROS signaling.  These findings indicate that FtAUR3 plays a crucial positive role in Tartary buckwheat resistance against salt stress.

Key words: Fagopyrum tataricum , GWAS , aurora-3 , salt stress , gairy roots , Arabidopsis thaliana