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当前位置: 首页 > 文章 > Alternative splicing of the PECTINESTERASE gene encoding a cell wall-degrading enzyme affects postharvest softening in grape 农业科学学报 (英文) 2024,23 (3)
Position: Home > Articles > Alternative splicing of the PECTINESTERASE gene encoding a cell wall-degrading enzyme affects postharvest softening in grape Journal of Integrative Agriculture 2024,23 (3)

Alternative splicing of the PECTINESTERASE gene encoding a cell wall-degrading enzyme affects postharvest softening in grape

作  者：
Liu, Hainan;Pei, Maosong;Ampomah-Dwamena, Charles;Shang, Yaxin;Yu, Yihe;Wei, Tonglu;Shi, Qiaofang;Guo, Dalong
单  位：
Henan Univ Sci & Technol, Coll Hort & Plant Protect, Luoyang 471000, Peoples R China;New Zealand Inst Plant & Food Res Ltd PFR, Auckland 1010, New Zealand;Henan Engn Technol Res Ctr Qual Regulat & Control, Luoyang 471000, Peoples R China
关键词：
grape;postharvest softening;folic acid;alternative splicing;Pectinesterase 2;alternative 3 splice site
摘  要：
The firmness of table grape berries is a crucial quality parameter. Despite extensive research on postharvest fruit softening, its precise molecular mechanisms remain elusive. To enhance our comprehension of the underlying molecular factors, we initially identified differentially expressed genes (DEGs) by comparing the transcriptomes of folic acid (FA)-treated and water-treated (CK) berries at different time points. We then analyzed the sequences to detect alternatively spliced (AS) genes associated with postharvest softening. A total of 2,559 DEGs were identified and categorized into four subclusters based on their expression patterns, with subcluster-4 genes exhibiting higher expression in the CK group compared with the FA treatment group. There were 1,045 AS-associated genes specific to FA-treated berries and 1,042 in the CK-treated berries, respectively. Gene Ontology (GO) annotation indicated that the AS-associated genes in CK-treated berries were predominantly enriched in cell wall metabolic processes, particularly cell wall degradation processes. Through a comparison between treatment-associated AS genes and subcluster-4 DEGs, we identified eight genes, including Pectinesterase 2 (VvPE2, Vitvi15g00704), which encodes a cell wall-degrading enzyme and was predicted to undergo an A3SS event. The reverse transcription polymerase chain reaction further confirmed the presence of a truncated transcript variant of VvPE2 in the FA-treated berries. Our study provides a comprehensive analysis of AS events in postharvest grape berries using transcriptome sequencing and underscores the pivotal role of VvPE2 during the postharvest storage of grape berries.

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