热带作物学报 2023, 44(11): 21792187
Chinese Journal of Tropical Crops
收稿日期 2023-02-02;修回日期 2023-02-17
基金项目 国家自然科学基金项目(No. 32260419);研究生创新课题(No. 2022ZKY463)。
作者简介 臧 睿(1998—),女,硕士研究生,研究方向:分子植物育种。*通信作者(Corresponding author):和凤美(HE Fengmei),
E-mail:hefengmei918@126.com。
mRNAs/microRNAs 调控网络探索石斛花型差异分子机理研究
臧 睿,陈 宇,赵 美,郝玉恒,敖 叠,李凯莉,方诗迪,赵奇明,
和凤美*
云南农业大学园林园艺学院,云南昆明 650201
摘 要:目前兰科植物花型多样性形成分子机理仍不清楚,本研究对铁皮石斛、美花石斛花器官进行转录组和 microRNA
测序,通过 cytoscape 构建 miRNA-mRNA 网络和靶基因蛋白互作网络并进行差异比较,以期在分子水平上探究 2 种石斛
花型差异分子机理。转录组研究结果表明,与花发育相关的 mRNAs 有 MADS-box AP3 基因、激素类基因等。miRNA-mRNA
网络分析表明,差异表达的 miRNAs、mRNAs 参与了花型差异形成,miR5179 与靶基因 AP3、miR160 与靶基因 ARFs、
miR164 与靶基因 NAC021、miR159 与靶基因 GAM1、bdi-miR159 与靶基因 CKX9、miR167b-3p 与靶基因 ANT 可能参与
花型形成,以上 miRNA 均在铁皮石斛中上调表达。蛋白互作通路表明,2 种石斛有 AP3 这一关键基因,美花石斛缺少
CUL1、TIR1、TIR1A、RBS 四个基因;2 种石斛的生长素反应互作通路中存在 2 个差异表达的 ARFs 基因,美花石斛缺失
1 个 ARFI 基因;美花石斛特异性地拥有由 NAC021 基因构成的生长素信号转导靶基因蛋白互作通路。铁皮石斛和美花石
斛花型差异表达 miRNAs/mRNAs 以及靶基因蛋白互作差异可能是导致 2 种石斛花型差异的主要机理。
关键词:铁皮石斛;美花石斛;花型;转录组;small RNA;调控网络
中图分类号:S682.31 文献标识码:A
Differential Molecular Mechanism of Dendrobium Flower Pattern
Using mRNAs/microRNAs Regulatory Network
ZANG Rui, CHEN Yu, ZHAO Mei, HAO Yuheng, AO Die, LI Kaili, FANG Shidi, ZHAO Qiming,
HE Fengmei*
College of Horticulture and Landscape, Yunnan Agricultural University, Kunming, Yunnan 650201, China
Abstract: The molecular mechanism of the formation of flower diversity is still unclear. In this study, the transcriptome
and microRNA sequencing of Dendrobium officinale and D. loddigesii flower organs were performed, and the
miRNA-mRNA network and target protein interaction network were constructed by cytoscape and compared at the molecular level. The results of transcriptome studies showed that mRNAs related to flower development had MADS-box
AP3 gene, hormone genes, etc. The miRNA-mRNA network analysis showed that the differentially expressed miRNAs
and mRNAs were involved in the differential formation of floral pattern, and miR5179 and its target genes AP3, miR160
and their target genes ARFs, miR164 and its target genes NAC021, miR159 and the target genes GAM1, bdi-miR159 and
the target genes CKX9, miR167b-3p and the target genes ANT may be involved in floral pattern formation, and the above
miRNA was upregulated in D. officinale. The protein interaction pathway showed that two kinds of dendrobium had the
key gene of AP3, D. loddigesii lacked four genes: CUL1, TIR1, TIR1A and RBS; there weret wo differentially expressed
ARFs genes in the auxin response interaction pathway of two Dendrobium, and D. loddigesii lacked one ARFI gene; D.
loddigesii flora specifically possessed the protein interaction pathway of auxin signal transduction target genes constituted
by the NAC021 gene. Differential expression of miRNAs/mRNAs in D. officinale and D. loddigesii and protein interaction
of target genes may be the main mechanisms leading to the difference between the two Dendrobium flower types.