Polar auxin transport together with aintegumenta and revoluta coordinate early Arabidopsis gynoecium development

Developmental Biology
Staci Nole-WilsonRobert G Franks

Abstract

In flowering plants the gynoecium is the female reproductive structure and the site of oogenesis, fertilization, and maturation of the embryo and the seed. Proper development of the gynoecium requires that the early gynoecial primordium be partitioned into distinct spatial domains with divergent fates. Regulated transport of the phytohormone auxin previously has been shown to play a role in the patterning of spatial domains along the apical-basal axis of the gynoecium. Here we establish a role for auxin transport in patterning along the medio-lateral axis of the gynoecial ovary. We demonstrate that auxin transport is required for the development of the medial ovary domain that contains the carpel margin meristem, a vital female reproductive structure. Disruptions in auxin transport enhance the medial domain defects observed in aintegumenta and revoluta mutant genotypes. Aintegumenta and revoluta are likely to function in parallel and partially overlapping pathways required for medial domain development. Our data indicate that different ovary domains are differentially sensitive to the reduction of polar auxin transport and the loss of aintegumenta and revoluta activity. We suggest that an auxin-mediated positional cue is import...Continue Reading

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Citations

Nov 28, 2013·Trends in Plant Science·Anneke HorstmanRenze Heidstra
Jul 16, 2013·Nature Genetics·Arturo Marí-OrdóñezOlivier Voinnet
Sep 7, 2013·Trends in Plant Science·J Irepan Reyes-OlaldeStefan de Folter
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Jan 24, 2019·Plant Reproduction·J Irepan Reyes-Olalde, Stefan de Folter
Aug 21, 2020·Proceedings of the National Academy of Sciences of the United States of America·Wen-Yu LiuWen-Hsiung Li
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Nov 26, 2020·Development·Shi-Xia YuWen-Hui Lin
May 2, 2021·Horticulture Research·Umer KaramatJianjun Zhao

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