Journal of Integrative Agriculture ›› 2025, Vol. 24 ›› Issue (1): 114-131.DOI: 10.1016/j.jia.2023.12.003

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综合生理学和蛋白质组学分析揭示了小麦籽粒对孕穗期低温胁迫的响应


  

  • 收稿日期:2023-07-21 接受日期:2023-11-10 出版日期:2025-01-20 发布日期:2025-01-07

An integrated physiology and proteomics analysis reveals the response of wheat grain to low temperature stress during booting

Anmin Zhang, Zihong Li, Qirui Zhou, Jiawen Zhao, Yan Zhao, Mengting Zhao, Shangyu Ma, Yonghui Fan, Zhenglai Huang#, Wenjing Zhang#   

  1. College of Agronomy, Anhui Agricultural University/Key Laboratory of Wheat Biology and Genetic Improvement in South Yellow & Huai River Valley, Ministry of Agriculture and Rural Affairs, Hefei 230036, China
  • Received:2023-07-21 Accepted:2023-11-10 Online:2025-01-20 Published:2025-01-07
  • About author:Anmin Zhang, Tel: +86-551-65786213, E-mail: zhanganmin1998 @163.com; #Correspondence Wenjing Zhang, Tel: +86-551-65786213, E-mail: zhangwenjing79@126.com; Zhenglai Huang, Tel: +86-551-65786213, E-mail: xdnyyjs@163.com
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (32372223), the National Key Research and Development Program of China (2022YFD2301404), the College Students’ Innovation and Entrepreneurship Training Program of Anhui Province, China (S202210364136), and the Natural Science Research Project of Anhui Educational Committee, China (2023AH040133).



摘要:

春季低温(LT)已成为制约小麦生长发育的主要非生物胁迫之一。为研究小麦籽粒发育对孕穗期低温胁迫的响应机制,进行了多种分析,包括孕穗期低温处理后小麦籽粒形态观察、淀粉合成酶活性测定以及直链淀粉和支链淀粉含量测定。此外,利用串联质谱标签技术(TMT)进行了蛋白质组学分析。结果表明,低温胁迫后小麦籽粒的饱满度下降。此外,蔗糖合酶(SuS, EC 2.4.1.13)和腺苷二磷酸葡萄糖焦磷酸化酶(AGPase, EC 2.7.7.27)活性显著下降,导致直链淀粉和支链淀粉含量显著降低。通过蛋白质组学分析,共鉴定出509个差异表达蛋白(DEPs)。GO富集分析表明,分子功能中的营养储存库活性蛋白差异倍数最大,并且上调表达的贮藏蛋白(SSP)在籽粒对低温胁迫及后续伤害的响应中起着积极作用。KEGG富集分析表明,低温胁迫降低了蔗糖和淀粉代谢途径中蔗糖磷酸合成酶(SPS)、葡萄糖-1-磷酸腺苷转移酶(glgC))β-呋喃果糖苷酶(FFase)DEPs的表达,从而影响了籽粒淀粉的合成。此外,在内质网途径的蛋白质加工中发现了许多热休克蛋白(HSPs),这些HSPs可以抵抗低温胁迫带来的一些损伤。这些研究结果为阐明春季低温胁迫小麦产量形成的潜在机理提供了新的理论基础。

Abstract:

Low temperature (LT) in spring has become one of the principal abiotic stresses that restrict the growth and development of wheat.  Diverse analyses were performed to investigate the mechanism underlying the response of wheat grain development to LT stress during booting.  These included morphological observation, measurements of starch synthase activity, and determination of amylose and amylopectin content of wheat grain after exposure to treatment with LT during booting.  Additionally, proteomic analysis was performed using tandem mass tags (TMT).  Results showed that the plumpness of wheat grains decreased after LT stress.  Moreover, the activities of sucrose synthase (SuS, EC 2.4.1.13) and ADP-glucose pyrophosphorylase (AGPase, EC 2.7.7.27) exhibited a significant reduction, leading to a significant reduction in the contents of amylose and amylopectin.  A total of 509 differentially expressed proteins (DEPs) were identified by proteomics analysis.  The Gene Ontology (GO) enrichment analysis showed that the protein difference multiple in the nutritional repository activity was the largest among the molecular functions, and the up-regulated seed storage protein (SSP) played an active role in the response of grains to LT stress and subsequent damage.  The Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis showed that LT stress reduced the expression of DEPs such as sucrose phosphate synthase (SPS), glucose-1-phosphate adenylyltransferase (glgC), and β-fructofuranosidase (FFase) in sucrose and starch metabolic pathways, thus affecting the synthesis of grain starch.  In addition, many heat shock proteins (HSPs) were found in the protein processing in endoplasmic reticulum pathways, which can resist some damage caused by LT stress.  These findings provide a new theoretical foundation for elucidating the underlying mechanism governing wheat yield development after exposure to LT stress in spring.

Key words: low temperature at booting , wheat ,  grain ,  starch synthesis ,  proteomics