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Funct Integr Genomics

Title:		Labellum transcriptome reveals alkene biosynthetic genes involved in orchid sexual deception and pollination-induced senescence
Author(s):		Monteiro F; Sebastiana M; Figueiredo A; Sousa L; Cotrim HC; Pais MS;
Address:		"Plant Systems Biology Lab, Center for Biodiversity, Functional & Integrative Genomics (BioFIG), University of Lisbon, Lisbon, Portugal. fimonteiro@fc.ul.pt"
Journal Title:		Funct Integr Genomics
Year:		2012
Volume:		20120617
Issue:		4
Page Number:		693 - 703
DOI:		10.1007/s10142-012-0288-x
ISSN/ISBN:		1438-7948 (Electronic) 1438-793X (Linking)
Abstract:		"One of the most remarkable pollination strategy in orchids biology is pollination by sexual deception, in which the modified petal labellum lures pollinators by mimicking the chemical (e.g. sex pheromones), visual (e.g. colour and shape/size) and tactile (e.g. labellum trichomes) cues of the receptive female insect species. The present study aimed to characterize the transcriptional changes occurring after pollination in the labellum of a sexually deceptive orchid (Ophrys fusca Link) in order to identify genes involved on signals responsible for pollinator attraction, the major goal of floral tissues. Novel information on alterations in the orchid petal labellum gene expression occurring after pollination demonstrates a reduction in the expression of alkene biosynthetic genes using O. fusca Link as the species under study. Petal labellum transcriptional analysis revealed downregulation of transcripts involved in both pigment machinery and scent compounds, acting as visual and olfactory cues, respectively, important in sexual mimicry. Regulation of petal labellum senescence was revealed by transcripts related to macromolecules breakdown, protein synthesis and remobilization of nutrients"
Keywords:		"Alkenes/*metabolism Flowers/*genetics/metabolism/physiology Gene Expression Regulation, Developmental Gene Expression Regulation, Plant *Genes, Plant Orchidaceae/*genetics/growth & development/metabolism Pollination/*genetics *Transcriptome;"
Notes:		"MedlineMonteiro, Filipa Sebastiana, Monica Figueiredo, Andreia Sousa, Lisete Cotrim, Helena C Pais, Maria Salome eng Research Support, Non-U.S. Gov't Germany 2012/06/19 Funct Integr Genomics. 2012 Nov; 12(4):693-703. doi: 10.1007/s10142-012-0288-x. Epub 2012 Jun 17"