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园艺学报 ›› 2023, Vol. 50 ›› Issue (2): 397-409.doi: 10.16420/j.issn.0513-353x.2021-1039

• 研究报告 • 上一篇    下一篇

苹果GRAS全基因组鉴定及其对生长素的响应分析

于婷婷, 李欢, 宁源生, 宋建飞, 彭璐琳, 贾竣淇, 张玮玮, 杨洪强*()   

  1. 山东农业大学园艺科学与工程学院,作物生物学国家重点实验室,山东泰安 271018
  • 收稿日期:2022-06-06 修回日期:2022-09-26 出版日期:2023-02-25 发布日期:2023-03-06
  • 通讯作者: *(E-mail:hqyang@sdau.edu.cn)
  • 基金资助:
    国家自然科学基金项目(32172517);国家重点研发计划项目(2019YFD1000103)

Genome-wide Identification of GRAS Gene Family in Apple and Expression Analysis of Its Response to Auxin

YU Tingting, LI Huan, NING Yuansheng, SONG Jianfei, PENG Lulin, JIA Junqi, ZHANG Weiwei, YANG Hongqiang*()   

  1. State Key Laboratory of Crop Biology,College of Horticulture Science and Engineering,Shandong Agricultural University,Tai’an,Shandong 271018,China
  • Received:2022-06-06 Revised:2022-09-26 Online:2023-02-25 Published:2023-03-06
  • Contact: *(E-mail:hqyang@sdau.edu.cn)

摘要:

从苹果(Malus × domestica)全基因组中鉴定到78个结构完整的GRAS基因,它们的编码蛋白分属于11个亚家族,其中LISCL亚家族成员最多;这78个MdGRAS基因分别定位于18条染色体上,其中11个位于3号染色体上。苹果GRAS家族中还存在片段复制和串联复制基因。苹果器官特异性表达谱显示,除MdGRAS47外,大部分MdGRAS在根系中表达量较低;MdGRAS20在枝条中表达量较高,MdGRAS18MdGRAS55MdGRAS61在种子中表达量较高。启动子分析显示,这78个MdGRAS全部含光响应元件,76个含胁迫相关元件,37个含有生长素响应元件;17个MdGRAS的表达对2,4-D处理有响应,其中MdGRAS30MdGRAS61的响应最显著。

关键词: 苹果, GRAS基因家族, 生物信息, 启动子, 生长素

Abstract:

GRAS is a plant-specific transcription factor. In this study,78 GRAS genes were identified from the whole genome of apple(Malus × domestica)based on the conserved domain PF0351. MdGRASs encoding proteins belong to 11 subfamilies and most of them are the members of LISCL subfamily. They are located on 18 chromosomes,11 of which are located on chromosome 3. There were segmental duplication and tandem duplication events in GRAS family of apple. Ogran-specific expression profile analysis showed that,except for MdGRAS47,most of MdGRASs exhibited low transcript abundance levels in apple roots;MdGRAS20 showed higher expression level in shoots while MdGRAS18MdGRAS55 and MdGRAS61 highly expressed in seeds. Promoter analysis indicated that all 78 MdGRASs contained light response elements,76 out of 78 MdGRASs contained stress-related elements and 37 out of 78 MdGRASs contained auxin response elements. It was confirmed that 17 MdGRASs could respond to 2,4-D with MdGRAS30 and MdGRAS61 responded to 2,4-D most significantly.

Key words: apple, GRAS gene family, bioinformatics, promoter, auxin

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