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Comprehensive analysis of polygalacturonase genes offers new insights into their origin and functional evolution in land plants

文献类型： 外文期刊

作者： Mahmood, Umer 1 ; Fan, Yonghai 1 ; Wei, Siyu 1 ; Niu, Yue 1 ; Li, Yanhua 2 ; Huang, Hualei 2 ; Chen, Yuling 1 ; Tang, Zha 1 ;

作者机构： 1.Southwest Univ, Coll Agron & Biotechnol, Chongqing 400715, Peoples R China

2.Chongqing Acad Agr Sci, Inst Characterist Crop Res, Chongqing 402160, Peoples R China

3.Southwest Univ, Acad Agr Sci, Chongqing 400715, Peoples R China

4.Minist Educ, Engn Res Ctr South Upland Agr, Chongqing 400715, Peoples R China

关键词： Polygalacturonase; Origin; Functional evolution; Land plants

期刊名称：GENOMICS （ 影响因子：3.4； 五年影响因子：3.5 ）

ISSN： 0888-7543

年卷期： 2021 年 113 卷 1 期

页码：

收录情况： SCI

摘要： Polygalacturonase (PG) is a hydrolase that participates in pectin degradation, pod shattering and fruit softening. Here, we identified 2786 PG genes across 54 plants, which could be divided into three groups. Evolutionary analysis suggested that PG family originated from the charophyte green algae, and Subgroups A2-A4 evolved from the Subgroup A1 after the tracheophyte-angiosperm split. Whole-genome duplication was the major force leading to PG gene expansion. Interestingly, the PG genes continuously expanded in eudicots, whereas it contracted in monocots after the eudicot-monocot split. PG genes in Group A are expressed at high levels in floral organs, whereas genes in Groups B and C are expressed at high levels in various tissues. Moreover, three BnaPG15 members were found for their potential possibility in pod shattering in Brassica napus. Our results provide new insight into the evolutionary history of PG family, and their potentially functional role in plants.

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