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Genome-wide identification, phylogeny, and expression analysis of GRF transcription factors in pineapple (Ananas comosus)

文献类型： 外文期刊

作者： Yi, Wen 1 ; Luan, Aiping 2 ; Liu, Chaoyang 1 ; Wu, Jing 1 ; Zhang, Wei 1 ; Zhong, Ziqin 1 ; Wang, Zhengpeng 1 ; Yang, Mingzhe 1 ; Chen, Chengjie 1 ; He, Yehua 1 ;

作者机构： 1.South China Agr Univ, Coll Hort, Key Lab Biol & Germplasm Enhancement Hort Crops So, Minist Agr & Rural Areas, Guangzhou, Peoples R China

2.Chinese Acad Trop Agr Sci, Trop Crops Genet Resources Inst, Haikou, Peoples R China

关键词： pineapple; GRF gene family; phylogeny analysis; flower organ; expression analysis

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.6； 五年影响因子：6.8 ）

ISSN： 1664-462X

年卷期： 2023 年 14 卷

页码：

收录情况： SCI

摘要： BackgroundPineapple is the only commercially grown fruit crop in the Bromeliaceae family and has significant agricultural, industrial, economic, and ornamental value. GRF (growth-regulating factor) proteins are important transcription factors that have evolved in seed plants (embryophytes). They contain two conserved domains, QLQ (Gln, Leu, Gln) and WRC (Trp, Arg, Cys), and regulate multiple aspects of plant growth and stress response, including floral organ development, leaf growth, and hormone responses. The GRF family has been characterized in a number of plant species, but little is known about this family in pineapple and other bromeliads. Main discoveriesWe identified eight GRF transcription factor genes in pineapple, and phylogenetic analysis placed them into five subfamilies (I, III, IV, V, VI). Segmental duplication appeared to be the major contributor to expansion of the AcGRF family, and the family has undergone strong purifying selection during evolution. Relative to that of other gene families, the gene structure of the GRF family showed less conservation. Analysis of promoter cis-elements suggested that AcGRF genes are widely involved in plant growth and development. Transcriptome data and qRT-PCR results showed that, with the exception of AcGRF5, the AcGRFs were preferentially expressed in the early stage of floral organ development and AcGRF2 was strongly expressed in ovules. Gibberellin treatment significantly induced AcGRF7/8 expression, suggesting that these two genes may be involved in the molecular regulatory pathway by which gibberellin promotes pineapple fruit expansion. ConclusionAcGRF proteins appear to play a role in the regulation of floral organ development and the response to gibberellin. The information reported here provides a foundation for further study of the functions of AcGRF genes and the traits they regulate.

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