The importance of localized auxin production for morphogenesis of reproductive organs and embryos in Arabidopsis Journal Article


Author(s): Robert, Hélène S; Crhák Khaitová, Lucie; Mroue, Souad; Benková, Eva
Article Title: The importance of localized auxin production for morphogenesis of reproductive organs and embryos in Arabidopsis
Affiliation IST Austria
Abstract: Plant sexual reproduction involves highly structured and specialized organs: stamens (male) and gynoecia (female, containing ovules). These organs synchronously develop within protective flower buds, until anthesis, via tightly coordinated mechanisms that are essential for effective fertilization and production of viable seeds. The phytohormone auxin is one of the key endogenous signalling molecules controlling initiation and development of these, and other, plant organs. In particular, its uneven distribution, resulting from tightly controlled production, metabolism and directional transport, is an important morphogenic factor. In this review we discuss how developmentally controlled and localized auxin biosynthesis and transport contribute to the coordinated development of plants' reproductive organs, and their fertilized derivatives (embryos) via the regulation of auxin levels and distribution within and around them. Current understanding of the links between de novo local auxin biosynthesis, auxin transport and/or signalling is presented to highlight the importance of the non-cell autonomous action of auxin production on development and morphogenesis of reproductive organs and embryos. An overview of transcription factor families, which spatiotemporally define local auxin production by controlling key auxin biosynthetic enzymes, is also presented.
Keywords: Transcription Factors; embryo; Arabidopsis; Auxin; Auxin transport; Auxin biosynthesis; Auxin signalling; carpel; gynoecium; ovules; reproductive organs; stamen
Journal Title: Journal of Experimental Botany
Volume: 66
Issue 16
ISSN: 1460-2431
Publisher: Oxford University Press  
Date Published: 2015-08-01
Start Page: 5029
End Page: 5042
DOI: 10.1093/jxb/erv256
Notes: The work was supported by grants from: the Employment of Best Young Scientists for International Cooperation Empowerment/OPVKII programme (CZ.1.07/2.3.00/30.0037) to HSR and LCK; the Czech Science Foundation (GA13-39982S) to EB, LCK and SM; and the SoMoPro II programme (3SGA5602), cofinanced by the South-Moravian Region and the EU (FP7/2007–2013 People Programme), to HSR.
Open access: no