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Comparative transcriptome analysis of a fan-shaped inflorescence in pineapple using RNA-seq

文献类型： 外文期刊

作者： Xie, Tao 1 ; Zhang, Jing 1 ; Luan, Aiping 3 ; Zhang, Wei 2 ; Wu, Jing 2 ; Cai, Zhiquan 1 ; He, Yehua 2 ;

作者机构： 1.Foshan Univ, Dept Hort, Foshan 528231, Peoples R China

2.South China Agr Univ, Minist Agr, Key Lab Biol & Germplasm Enhancement Hort Crops S, Guangzhou 510642, Peoples R China

3.Chinese Acad Trop Agr Sci, Trop Crops Genet Resources Inst, Haikou 571101, Hainan, Peoples R China

关键词： Pineapple; Transcriptome analysis; Fan-shaped inflorescence; RNA-Seq technique; Differentially expressed genes

期刊名称：GENOMICS （ 影响因子：5.736； 五年影响因子：4.939 ）

ISSN： 0888-7543

年卷期： 2021 年 113 卷 5 期

页码：

收录情况： SCI

摘要： Pineapple plant usually has a capitulum. However, a fan-shaped inflorescence was exceptionally evolved in pineapple, having multiple crown buds. In order to reveal the molecular mechanisms of the formation of the fanshaped inflorescence, fruit traits and the transcriptional differences between the fan-shaped inflorescence and the wild-shaped inflorescence pineapples were analyzed in three tissues, i.e., the flower stem apex, the base of the inflorescence, and the inflorescence axis. The weight (i.e., individual yield) of fan-shaped fruit is 4.5 times that of wild-shaped fruit;and non-significant difference in soluble solids, soluble sugar, titratable acid, and Vitamin C was found. Between the fan-shaped inflorescence and wild-shaped inflorescence, a total of 5370 differentially expressed genes were identified across the three tissues. Of these genes, there were 489 overlapping differentially expressed genes in all three tissue comparisons. Between the two pineapples, functional analysis indicated that 444 transcription factors and 206 inflorescence development-related genes were differentially expressed in at least one tissue comparison, while 45 transcription factors and 21 inflorescence development-related genes were overlapped across three tissues. Among the 489 overlapping differentially expressed genes in the three tissue comparisons, excluding the inflorescence development-related genes and transcription factors, 80 of them revealed a higher percentage of involvement in the biological processes relating to response to auxin, and reproductive processes. RNA-seq value and real-time quantitative PCR analysis exhibited the similar gene expression patterns in the three tissues. Our result provided novel cues for understanding the molecular mechanisms of the formation of the fan-shaped inflorescence in pineapple, making a valuable resource for the study of plant breeding and the speciation of pineapple.

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