浙江农业学报 ›› 2024, Vol. 36 ›› Issue (10): 2204-2218.DOI: 10.3969/j.issn.1004-1524.20240162

• 园艺科学 • 上一篇    下一篇

甜樱桃PP2C家族全基因组鉴定与表达分析

刘博华1(), 张庆霞2, 祁亮1, 吴玉霞1, 王延秀1,*()   

  1. 1.甘肃农业大学 园艺学院,甘肃 兰州 730070
    2.陇东学院 农林科技学院,甘肃 庆阳 745000
  • 收稿日期:2024-02-22 出版日期:2024-10-25 发布日期:2024-10-30
  • 作者简介:刘博华(2001—),男,甘肃天水人,硕士,主要从事果树种质资源与遗传育种研究。E-mail:1830521903@qq.com
  • 通讯作者: *王延秀,E-mail:wangxy@gsau.edu.cn
  • 基金资助:
    甘肃省科技厅技术创新引导计划(21CX6NM108);甘肃农业大学自列项目(701-0722105)

Genomic-wide identification and expression analysis of the PP2C gene family in sweet cherry

LIU Bohua1(), ZHANG Qingxia2, QI Liang1, WU Yuxia1, WANG Yanxiu1,*()   

  1. 1. College of Horticulture, Gansu Agricultural University, Lanzhou 730070, China
    2. College of Agriculture and Forestry Science and Technology, Longdong University,Qingyang 745000, Gansu,China
  • Received:2024-02-22 Online:2024-10-25 Published:2024-10-30

摘要:

蛋白磷酸酶(protein phosphatase 2C, PP2C)作为ABA信号通路关键调控因子,在植物生长、激素传导和逆境响应中起重要作用。鉴定和分析甜樱桃PP2C基因家族对不同非生物胁迫的响应,以探究甜樱桃中该家族成员的抗逆功能。于蔷薇科基因组数据库 (https://www. rosaceae. org/)中下载甜樱桃全基因组文件,利用生物信息学研究其蛋白理化性质、亲缘关系、基因结构、染色体定位和共线性、启动子顺式元件等。以樱桃吉塞拉7号试管苗为材料,通过实时荧光定量PCR(qRT-PCR)进行表达模式分析。甜樱桃PP2C家族中共鉴定出76个成员,其蛋白质序列长度介于125~1 580个氨基酸之间,理论等电点(pI)在4.57~9.40,72%成员为酸性蛋白。染色体定位表明它们不均匀地分布在所有染色体上,包括14对共线性基因,可分为12个亚家族。亚细胞定位预测显示该家族成员主要分布于细胞核中。顺式作用元件分析表明,76个PaPP2C基因上游2 000 bp启动子区域均含有响应激素、光和环境胁迫的元件。挑选10个基因进行qRT-PCR分析发现,PaPP2C23、PaPP2C47、PaPP2C48、PaPP2C49这4个基因在干旱(PEG)、氯化钠(NaCl)和脱落酸(ABA)胁迫下均显著上调,推测以上基因可以通过依赖脱落酸调控干旱和氯化钠胁迫;在低温(LT)条件下,PaPP2C71、PaPP2C5、PaPP2C49、PaPP2C23、PaPP2C59、PaPP2C69、PaPP2C60基因显著下调,表明它们可能在低温胁迫中起负调控作用。甜樱桃PP2C家族基因成员可在干旱、氯化钠、低温以及脱落酸等非生物逆境中发挥作用。

关键词: 甜樱桃2C类蛋白磷酸酶, 干旱, 低温, 顺式作用元件

Abstract:

Protein phosphatase (protein phosphatase 2C, PP2C), as a key regulator of ABA signaling pathway, plays an important role in plant growth, hormone transduction and stress response. To identify and analyze the response of sweet cherry PP2C gene family to different abiotic stresses, the stress resistance function of this family members were explored in sweet cherry, in order to provide a theoretical basis for improving their stress resistance by genetic engineering technology. The whole genome file was downloaded from Rosaceae genome database (https://www. rosaceae.org/). Bioinformatics was used to study the physicochemical properties, genetic relationships, gene structure, chromosome localization and collinearity, promoter cis-elements, etc. Cherry Gisela No. 7 test-tube seedlings were used as materials,real-time fluorescence quantification PCR (qRT-PCR) was used to analyze the expression patterns. A total of 76 members of the sweet Cherry PP2C family were identified, whose protein sequence length ranged from 125 to 1 580 amino acids, theoretical isoelectric point (pI) ranged from 4.57 to 9.40, and 72% of the members were acidic proteins. Chromosomal localization showed that they were unevenly distributed on 8 chromosomes of sweet cherry, including 14 collinear gene pairs, which could be divided into 12 subfamilies. Subcellular localization prediction showed that the family members were mainly distributed in the nucleus. Additionally, Analysis of cis-acting elements displayed that the upstream 2 000 bp promoter region of 76 PaPP2C genes contained multiple elements, such as elements of hormone, light and environmental stress. The results of qRT-PCR analysis of 10 genes showed that PaPP2C23, PaPP2C47, PaPP2C48 and PaPP2C49 genes were significantly up-regulated under drought (PEG), salt (NaCl) and abscisic acid (ABA) stresses, which was speculated that the above genes could regulate drought and salt stress by relying on abscisic acid. Additionally, PaPP2C71, PaPP2C5, PaPP2C49, PaPP2C23, PaPP2C59,PaPP2C60 and PaPP2C74 were significantly down-regulated, indicating that they might play negative regulatory role in low temperature stress. Sweet cherry PP2C family members can play important role in biotic stresses such as drought, salt, low temperature, and abscisic acid.

Key words: sweet cherry 2C protein phosphatase, drought, microtherm, cis-acting element

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