The orchid family (Orchidaceae) represents the second largest angiosperm family, having over 900 genera and 27,000 species in almost all over the world. Orchids have evolved a myriad of intriguing ways in order to survive extreme weather conditions, acquire nutrients, and attract pollinators for reproduction. The family of MADS-box transcriptional factors have been shown to be involved in the control of many developmental processes and responses to environmental stresses in eukaryotes. Several findings in different orchid species have elucidated that MADS-box genes play critical roles in the orchid growth and development. An in-depth understanding of their ecological adaptation will help to generate more interest among breeders and produce novel varieties for the floriculture industry. In this review, we summarize recent findings of MADS-box transcription factors in regulating various growth and developmental processes in orchids, in particular, the floral transition and floral patterning. We further discuss the prospects for the future directions in light of new genome resources and gene editing technologies that could be applied in orchid research and breeding.
Keywords: MADS-box transcription factors; development; floral patterning; floral transition; orchid.
Copyright © 2019 Teo, Zhou and Shen.
The orchid MADS-box genes controlling floral morphogenesis.ScientificWorldJournal. 2006 Jul 14;6:1933-44. doi: 10.1100/tsw.2006.321. ScientificWorldJournal. 2006. PMID: 17205198 Free PMC article. Review.
The MADS and the Beauty: Genes Involved in the Development of Orchid Flowers.Curr Genomics. 2011 Aug;12(5):342-56. doi: 10.2174/138920211796429754. Curr Genomics. 2011. PMID: 22294877 Free PMC article.
Genome-wide identification and classification of MIKC-type MADS-box genes in Streptophyte lineages and expression analyses to reveal their role in seed germination of orchid.BMC Plant Biol. 2019 May 28;19(1):223. doi: 10.1186/s12870-019-1836-5. BMC Plant Biol. 2019. PMID: 31138149 Free PMC article.
Transcriptome-wide analysis of the MADS-box gene family in the orchid Erycina pusilla.Plant Biotechnol J. 2016 Jan;14(1):284-98. doi: 10.1111/pbi.12383. Epub 2015 Apr 28. Plant Biotechnol J. 2016. PMID: 25917508
Floral Induction and Flower Development of Orchids.Front Plant Sci. 2019 Oct 10;10:1258. doi: 10.3389/fpls.2019.01258. eCollection 2019. Front Plant Sci. 2019. PMID: 31649713 Free PMC article. Review.
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GsMAS1 Encoding a MADS-box Transcription Factor Enhances the Tolerance to Aluminum Stress in Arabidopsis thaliana.Int J Mol Sci. 2020 Mar 15;21(6):2004. doi: 10.3390/ijms21062004. Int J Mol Sci. 2020. PMID: 32183485 Free PMC article.