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Russian Journal of Plant Physiology

, Volume 66, Issue 4, pp 618–627 | Cite as

Pollination-Induced Transcriptome and Phylogenetic Analysis in Cymbidium tortisepalum (Orchidaceae)

  • Y. ZhaoEmail author
  • D. Li
  • T. Liu
RESEARCH PAPERS
  • 14 Downloads

Abstract

Orchids comprise a group of ecologically and evolutionarily significant plants, and the Orchidaceae is one of the most abundant angiosperm families. Yet little is understood about the genetic control of its flower development. Like many orchids, Cymbidium tortisepalum ovaries develop only following pollination. In this study, high-throughput RNA-seq technology was used to characterize the C. tortisepalum transcriptome and to identify differentially expressed genes during floral development. A total number of 45 165 976 reads were generated and assembled into 60 301 unigenes. 38 643 unigenes matched to proteins in the NCBI database. To compare the transcriptomes of pre-pollinated and post-pollinated gynostemia, an RNA-seq method was used. RNA-seq abundance analysis identified potentially all of the transcribed genes in this species’ gynostemium before and after pollination, including 488 943 in the pre-pollinated gynostemium transcriptome, and 88 829 transcripts in the post-pollinated gynostemium. Further comparison of the transcripts revealed that 7252 genes had either been up-regulated or down-regulated in post-pollinated compared with pre-pollinated gynostemium development. The preponderance of auxin and ethylene biosynthesis and signaling pathway factors in these transcriptomes suggested that the early pollination-induced ovary development involves these two hormones, as has been observed in other species. The C. tortisepalum gynostemium RNA-sequencing data were compared to transcriptome data of Oryza sativa and Arabidopsis thaliana, including pre-pollination and post-pollination stages and total 11 conserved orthologs related to protein kinase were found by phylogenetic analysis. Therefore, the sequence and expression data produced from this study provides the most comprehensive sequence resource available for C. tortisepalum study to date.

Keywords:

Cymbidium tortisepalum ovary development phylogenetic analysis pollination transcriptome 

Notes

ACKNOWLEDGMENTS

We are very grateful to Zachary Larson-Rabin (Stine Seed Inc., Clive, Iowa, United States) and Michael Moller (Royal Botanic Garden Edinburgh, 20A Inverleith Row, Edinburgh EH3 5LR, Scotland, United Kingdom) for helpful discussion and revision the manuscript.

FUNDING

This work was supported by the National Natural Science Foundation of China (project nos. 31760059, NSFC31460053 and NSFC31060166) and CHINA scholarship council (project no. 201408535038 to Yinhe Zhao).

COMPLIANCE WITH ETHICAL STANDARDS

The authors declare that they have no conflict of interest. This article does not contain any studies involving animals or human participants performed by any of the authors.

Supplementary material

11183_2019_8067_MOESM1_ESM.pdf (7.1 mb)
11183_2019_8067_MOESM1_ESM.pdf

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Copyright information

© Pleiades Publishing, Ltd. 2019

Authors and Affiliations

  1. 1.College of Agronomy and Biotechnology, Yunnan Agricultural UniversityKunmingChina
  2. 2.Plant Germplasm and Genomics Center, Germplasm Bank of Wild Species, Kunming Institute of Botany, Chinese Academy of SciencesKunmingChina

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