An integrative model of the control of ovule primordia formation Journal Article

Author(s): Galbiati, Francesca; Sinha Roy, Dola; Simonini, Sara; Cucinotta, Mara; Ceccato, Luca; Cuesta, Candela; Šimášková, Mária; Benková, Eva; Kamiuchi, Yuri; Aida, Mitsuhiro; Weijers, Dolf; Simon, Rüdiger; Masiero, Simona; Colombo, Lucia
Article Title: An integrative model of the control of ovule primordia formation
Abstract: Upon hormonal signaling, ovules develop as lateral organs from the placenta. Ovule numbers ultimately determine the number of seeds that develop, and thereby contribute to the final seed yield in crop plants. We demonstrate here that CUP-SHAPED COTYLEDON 1 (CUC1), CUC2 and AINTEGUMENTA (ANT) have additive effects on ovule primordia formation. We show that expression of the CUC1 and CUC2 genes is required to redundantly regulate expression of PINFORMED1 (PIN1), which in turn is required for ovule primordia formation. Furthermore, our results suggest that the auxin response factor MONOPTEROS (MP/ARF5) may directly bind ANT, CUC1 and CUC2 and promote their transcription. Based on our findings, we propose an integrative model to describe the molecular mechanisms of the early stages of ovule development.
Keywords: Arabidopsis; PIN1; Ovule development; aintegumenta; cup-shaped cotyledon; monopteros
Journal Title: The Plant journal for cell and molecular biology
Volume: 76
Issue 3
ISSN: 1365-313X
Publisher: Wiley-Blackwell  
Publication Place: England
Date Published: 2013-09-19
Start Page: 446
End Page: 455
DOI: 10.1111/tpj.12309
Notes: The project and F.G. were supported by the CARIPLO Foundation (project 2009-2990) and COST (European Cooperation in Science and Technology) action HAPRECI (Harnessing Plant Reproduction for Crop Improvement). E.B. and C.C. were supported by the European Research Council through a ‘Starting Independent Research’ grant (ERC-2007-Stg-207362-HCPO). We thank A.P. MacCabe (Consejo Superior de Investigaciones Científicas, Valencia, Spain) for critical reading of the manuscript.
Open access: no