熱帶作物學報 2023, 44(11): 2179?2187
Chinese Journal of Tropical Crops
收稿日期 2023-02-02;修回日期 2023-02-17
基金項目 國家自然科學基金項目(No. 32260419);研究生創(chuàng)新課題(No. 2022ZKY463)。
作者簡介 臧 睿(1998—),女,碩士研究生,研究方向:分子植物育種。*通信作者(Corresponding author):和鳳美(HE Fengmei),
E-mail:hefengmei918@126.com。
mRNAs/microRNAs 調控網絡探索石斛花型差異分子機理研究
臧 睿,陳 宇,趙 美,郝玉恒,敖 疊,李凱莉,方詩迪,趙奇明,
和鳳美*
云南農業(yè)大學園林園藝學院,云南昆明 650201
摘 要:目前蘭科植物花型多樣性形成分子機理仍不清楚,本研究對鐵皮石斛、美花石斛花器官進行轉錄組和 microRNA
測序,通過 cytoscape 構建 miRNA-mRNA 網絡和靶基因蛋白互作網絡并進行差異比較,以期在分子水平上探究 2 種石斛
花型差異分子機理。轉錄組研究結果表明,與花發(fā)育相關的 mRNAs 有 MADS-box AP3 基因、激素類基因等。miRNA-mRNA
網絡分析表明,差異表達的 miRNAs、mRNAs 參與了花型差異形成,miR5179 與靶基因 AP3、miR160 與靶基因 ARFs、
miR164 與靶基因 NAC021、miR159 與靶基因 GAM1、bdi-miR159 與靶基因 CKX9、miR167b-3p 與靶基因 ANT 可能參與
花型形成,以上 miRNA 均在鐵皮石斛中上調表達。蛋白互作通路表明,2 種石斛有 AP3 這一關鍵基因,美花石斛缺少
CUL1、TIR1、TIR1A、RBS 四個基因;2 種石斛的生長素反應互作通路中存在 2 個差異表達的 ARFs 基因,美花石斛缺失
1 個 ARFI 基因;美花石斛特異性地擁有由 NAC021 基因構成的生長素信號轉導靶基因蛋白互作通路。鐵皮石斛和美花石
斛花型差異表達 miRNAs/mRNAs 以及靶基因蛋白互作差異可能是導致 2 種石斛花型差異的主要機理。
關鍵詞:鐵皮石斛;美花石斛;花型;轉錄組;small RNA;調控網絡
中圖分類號:S682.31 文獻標識碼: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.