浙江农业科学 ›› 2026, Vol. 67 ›› Issue (8): 1966-1976.DOI: 10.16178/j.issn.0528-9017.20250324

• 果树与蔬菜 • 上一篇    下一篇

库尔勒香梨越冬过程中PP2C基因家族的生物信息学分析

马红菲(), 张佳佳, 李倩琴, 辛红亮, 李锦()   

  1. 石河子大学 生命科学学院,新疆 石河子 832003
  • 收稿日期:2025-04-29 出版日期:2026-08-11 发布日期:2026-08-20
  • 通讯作者: 李锦
  • 作者简介:李锦,E-mail:lijin@shzu.edu.cn
    马红菲,研究方向为植物转基因。E-mail:1627919060@qq.com
  • 基金资助:
    国家自然科学基金项目(32260726);石河子大学青年拔尖人才项目(BJZK202410)

Bioinformatics analysis of the PP2C gene family in Korla fragrant pear during overwintering

MA Hongfei(), ZHANG Jiajia, LI Qianqin, XIN Hongliang, LI Jin()   

  1. College of Life Sciences,Shihezi University,Shihezi 832003,Xinjiang
  • Received:2025-04-29 Online:2026-08-11 Published:2026-08-20
  • Contact: LI Jin

摘要:

冬季极端低温环境会造成香梨树体冻伤,进而引发严重的次生病害。脱落酸(ABA)作为越冬过程中的主要调控信号,通过调控树体休眠和细胞生理,保障树体安全越冬。为探讨ABA信号在库尔勒香梨越冬中的作用模式,本研究以ABA信号通路中的关键基因PP2C为研究对象,鉴定并分析了库尔勒香梨PP2CPsPP2C)基因家族对低温胁迫的响应,以明确该基因在库尔勒香梨越冬过程中的功能与作用。通过生物信息学方法对库尔勒香梨PsPP2C基因家族进行基因组鉴定,分析其理化性质、蛋白保守结构域等;同时测定越冬过程中库尔勒香梨韧皮部ABA与水分、可溶性蛋白含量的关系,分析ABA在越冬过程中的作用。结果表明,库尔勒香梨基因组中共包含105个PsPP2C基因家族成员。通过与拟南芥中与SnRK2基因互作的PP2C进行比对,发现共有10个PsPP2C基因可能参与越冬ABA信号调控,这10个基因不均匀地分布在8条染色体上,且在越冬过程中均表达上调,推测其可能在越冬过程中发挥主要作用,从而提高库尔勒香梨对冷胁迫的耐受性。

关键词: 库尔勒香梨, PP2C基因家族, 生物信息学, 表达分析, ABA通路, 冷胁迫

Abstract:

Extreme low temperatures in winter can cause freezing injury to Korla fragrant pear trees,leading to severe secondary diseases. As a major regulatory signal during overwintering,abscisic acid(ABA)ensures safe overwintering by regulating tree dormancy and cellular physiology. To investigate the role of ABA signaling in the overwintering process of Korla fragrant pear,this study focused on PsPP2C,a key gene in the ABA signaling pathway,and identified and analyzed the response of the PsPP2C gene family to cold stress,aiming to clarify the function of this gene during overwintering. The PsPP2C gene family was subjected to genome-wide identification via bioinformatics methods,and their physicochemical properties,conserved protein domains,etc.,were analyzed. Meanwhile,the relationships between ABA content and water content as well as soluble protein content in the phloem of Korla fragrant pear during overwintering were measured to assess the role of ABA. The result showed that the genome of Korla fragrant pear contains 105 members of the PsPP2C gene family. By comparing with the PP2C genes in Arabidopsis thaliana that interact with the SnRK2 gene,a total of 10 PsPP2C genes were found to potentially participate in ABA signaling regulation during overwintering. These 10 genes are unevenly distributed on 8 chromosomes and are all upregulated during overwintering. It is speculated that these 10 PsPP2C genes may play major roles in overwintering,thereby enhancing the cold stress tolerance of Korla fragrant pear.

Key words: Korla fragrant pear, PsPP2C gene family, bioinformatics, expression analysis, ABA signaling pathway, cold stress

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