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园艺学报 ›› 2023, Vol. 50 ›› Issue (6): 1187-1202.doi: 10.16420/j.issn.0513-353x.2022-0297

• 遗传育种·种质资源·分子生物学 • 上一篇    下一篇

杭州地区不同需冷量甜樱桃品种休眠阶段花芽转录组分析

阮若昕1, 骆慧枫1, 张琛1, 黄康康1, 郗笃隽1, 裴嘉博1, 邢梦云1,2, 刘辉1,*()   

  1. 1杭州市农业科学研究院园艺研究所,杭州 310024
    2浙江大学园艺系,浙江省园艺植物整合生物学研究与应用重点实验室,杭州 310058
  • 收稿日期:2023-01-28 修回日期:2023-05-12 出版日期:2023-06-25 发布日期:2023-06-27
  • 通讯作者: * (E-mail:liuhui518lh@163.com
  • 基金资助:
    浙江省公益技术研究计划项目(LGN21C150005);浙江省市级农科院联盟区域示范性项目(2022SJLM02);杭州市农科院科技创新与示范推广基金项目(2022HNCT-06)

Transcriptome Analysis of Flower Buds of Sweet Cherry Cultivars with Different Chilling Requirements During Dormancy Stages in Hangzhou

RUAN Ruoxin1, LUO Huifeng1, ZHANG Chen1, HUANG Kangkang1, XI Dujun1, PEI Jiabo1, XING Mengyun1,2, LIU Hui1,*()   

  1. 1Institute of Horticulture,Hangzhou Academy of Agricultural Sciences,Hangzhou 310024,China
    2Department of Horticulture,Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology,Zhejiang University,Hangzhou 310058,China
  • Received:2023-01-28 Revised:2023-05-12 Published:2023-06-25 Online:2023-06-27

摘要:

为探究中国南方暖湿地区甜樱桃适栽品种花芽休眠阶段的分子调控机制,以杭州地区种植的2个不同需冷量甜樱桃品种‘布鲁克斯’和‘萨米脱’为材料,分别于休眠前期(S1)、内休眠期(S2)和萌芽前期(S3)采集花芽,通过转录组测序比较2个品种间的基因表达差异。分析表明,S1、S2和S3时期分别获得343、671和1 588个差异表达基因,其中S3的差异基因数最多。GO分析表明,细胞组建、细胞代谢过程、刺激响应以及转运蛋白活性相关的基因在3个时期品种间均表现出显著差异。KEGG分析表明,S3富集的差异基因数及相关代谢途径最多,主要集中在糖代谢和蛋白质合成加工相关途径以及植物—病原互作、植物激素信号转导等途径,表达趋势分析显示部分差异基因可能参与调控甜樱桃花芽休眠状态的转换。通过转录因子预测分析,筛选到包含9个转录因子家族的42个差异表达转录因子,其中AP2/ERF、MYB、WRKY、C2H2、C3H和MADS-box家族的13个转录因子在S2的表达量显著高于S1和S3,表明这些转录因子可能参与了甜樱桃花芽休眠期的调控。

关键词: 甜樱桃, 花芽, 休眠, 转录组, 差异表达基因

Abstract:

This study aims to explore the molecular regulation mechanism of flower bud dormancy in sweet cherry cultivars that are suitable for growing in South China. Two sweet cherry cultivars(‘Brooks’and‘Summit’)planted in Hangzhou with different chilling requirements were used as materials. Flower buds were collected at three different dormancy stages,namely pre-dormancy stage(S1),endodormancy stage(S2),and pre-budbreak stage(S3). Transcriptome sequencing was performed to analyze the gene expression differences between these two cultivars. 343,671,and 1 588 differentially expressed genes (DEGs)were obtained in S1,S2,and S3,respectively,and the number of DEGs in S3 was the largest. GO analysis revealed that the DEGs between the two cultivars were mainly enriched in the processes related to cellular component organization,cellular metabolism,response to stimulus,and transporter activity in the dormancy stages. KEGG analysis showed that the DEGs concentrated in S3,which involved sugar metabolism,protein processing,plant-pathogen interaction,and plant hormone signal transduction. The expression trends of some DEGs suggested their roles in regulating the transition of dormancy state of flower buds in sweet cherry. Forty-two differentially expressed transcription factors including nine families were obtained by predictive analysis of transcription factors. The expression levels of 13 transcription factors belonging to AP2/ERF,MYB,WRKY,C2H2,C3H,and MADS-box family in S2 were significantly higher than those in S1 and S3,suggesting that these transcription factors may be involved in the regulation of flower bud dormancy.

Key words: sweet cherry, flower bud, dormancy, transcriptome, DEGs

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