基于RNA-seq番石榴果实软化候选基因的挖掘及表达分析
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作者单位:

1.广西壮族自治区亚热带作物研究所/广西亚热带特色水果质量安全控制重点实验室,南宁 530001;2.南宁市农业科学研究所,南宁 530021;3.广西农业职业技术大学农业工程学院,南宁 530007

作者简介:

研究方向为果树种质资源研究及遗传育种,E-mail: jingshengfan@yeah.net

通讯作者:

陈丹,研究方向为农业生态,E-mail: ddan55@126.com

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基金项目:

广西农业科学院基本科研业务专项(桂农科2023YM123,桂农科2021YT146)


Mining and Expression Analysis of Softening Candidate Genes in Guava Fruit Based on RNA-seq
Author:
Affiliation:

1.Guangxi Subtropical Crops Research Institute/Guangxi Key Laboratory of Quality and Safety Control for Subtropical Fruits,Nanning 530001;2.Nanning Institute of Agricultural Sciences,Nanning 530021;3.College of Agricultural Engineering, Guangxi Vocational University of Agriculture, Nanning 530007

Fund Project:

Basic Scientific Research Projects of Guangxi Academy of Agricultural Sciences (Guinongke2023YM123,Guinongke2021YT146)

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    摘要:

    番石榴变种丰富,不同品种的果实质地差异较大。果实的软化程度决定了其食用口感、运输贮藏及货架期等商品价值。为探究影响番石榴果实质地软化的调控基因,本研究比较了酥脆品种粉红蜜与软肉品种西瓜2号果实在坚熟期与软熟期的转录组。结果表明,软熟期品种间差异表达基因数目最多,GO注释显示差异基因主要富集在结合活性和催化活性等分子功能中,KEGG代谢通路分析显示差异基因主要富集在光合作用、光合作用天线蛋白、半乳糖代谢和植物激素信号转导途径。两个品种在软熟期果实质地的差异与细胞壁代谢途径、木质素生物合成途径、植物激素代谢基因和转录因子的调控密切相关。J3R85008159_PGJ3R85010291_XTH的上调表达是促进番石榴软化的重要因素。J3R85010291_TCH4可能通过降低细胞壁的机械强度调控果实软化。木质素合成途径基因(J3R8506005_CADJ3R8502863_PODJ3R8507303_PODJ3R8500836_LACJ3R8507803_LAC)的下调表达延缓木质素的积累,促进果实软化。ABA途径调控基因(PYLSnRK2)、乙烯途径调控基因(ETR/ERSEBF1/2 EIN3)和相关转录因子家族基因(J3R85017767_MYBJ3R85004770_MYBJ3R85004060_NACJ3R85006932_NACJ3R85012461_ERFJ3R85010726_bHLHJ3R85003109_bHLHJ3R85014989_bHLHJ3R85015176_WRKYJ3R85014001_WRKYJ3R85014684_WRKYJ3R85010736_WRKY)可能协同调控细胞壁代谢基因的表达从而影响番石榴软化过程。

    Abstract:

    Guava variants are abundant and fruit texture varies considerably between varieties. The softening degree of fruit determines its edible taste, transportation, storage and shelf life and other commodity values. In order to explore the regulatory genes affecting the texture softening of guava fruit, transcriptomic sequencing was performed on two cultivars,Fenhongmi(crisp)and Xigua No.2(soft)at the firm ripening stage and soft ripening stage. The results showed that the number of differentially expressed genes was the highest among two varieties at soft maturity stage. GO annotation showed that differentially expressed genes were mainly enriched in molecular functions such as binding activity and catalytic activity, and KEGG metabolic pathway analysis showed that differentially expressed genes were mainly enriched in photosynthesis, photosynthetic antenna protein, galactose metabolism and plant hormone signal transduction pathways. The difference of texture of the two varieties in soft ripening stage is closely related to the regulation of cell wall metabolism, lignin biosynthesis pathway, plant hormone metabolism genes and transcription factors. The up-regulated expression of J3R85008159_PG and J3R85010291_XTH is an important factor promoting the softening of guava. J3R85010291_TCH4 may regulate fruit softening by reducing the mechanical strength of cell wall. Down-regulated expression of lignin synthesis pathway genes (J3R8506005_CADJ3R8502863_PODJ3R8507303_PODJ3R8500836_LAC and J3R8507803_LAC) delayed lignin accumulation and promoted fruit softening. ABA pathway regulatory genes (PYL and SnRK2), ethylene pathway regulatory genes (ETR/ ERSEBF1/2EIN3) and related transcription factor family genes (J3R85017767_MYBJ3R85004770_MYBJ3R85004060_NACJ3R85006932_NACJ3R85012461_ERFJ3R85010726_bHLHJ3R85003109_bHLHJ3R85014989_bHLHJ3R85015176_WRKYJ3R85014001_WRKYJ3R85014684_WRKYJ3R85010736_ WRKY) may synergistic regulate the expression of cell wall metabolic genes and thus affect the softening process of guava.

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范競升,马松琼,宁琳,等.基于RNA-seq番石榴果实软化候选基因的挖掘及表达分析[J].植物遗传资源学报,2025,26(1):189-201.

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  • 收稿日期:2024-03-10
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  • 在线发布日期: 2025-01-07
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