An integrative model of the control of ovule primordia formation. (19th September 2013)

• Record Type: Journal Article
• Authors: Galbiati, Francesca; Sinha Roy, Dola; Simonini, Sara; Cucinotta, Mara; Ceccato, Luca; Cuesta, Candela; Simaskova, Maria; Benkova, Eva; Kamiuchi, Yuri; Aida, Mitsuhiro; Weijers, Dolf; Simon, Rüdiger; Masiero, Simona; Colombo, Lucia
• Is Part Of: Plant journal. Volume 76:Number 3(2013:Nov.)
• Page Start: 446
• Page End: 455
• Publication Date: 2013-09-19
• Subjects: Plant molecular biology -- Periodicals; Plant cells and tissues -- Periodicals; Botany -- Periodicals; 580
• DOI: 10.1111/tpj.12309
• Languages: English
• ISSNs: 0960-7412

Abstract

<abstract abstract-type="main" id="tpj12309-abs-0001"> <title>Summary</title> <p>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 <italic>CUP‐SHAPED COTYLEDON 1</italic> (<italic>CUC1</italic>), <italic>CUC2</italic> and <italic>AINTEGUMENTA</italic> (<italic>ANT</italic>) have additive effects on ovule primordia formation. We show that expression of the <italic>CUC1</italic> and <italic>CUC2</italic> genes is required to redundantly regulate expression of <italic>PINFORMED1</italic> (<italic>PIN1</italic>), which in turn is required for ovule primordia formation. Furthermore, our results suggest that the auxin response factor <italic>MONOPTEROS</italic> (<italic>MP</italic>/<italic>ARF5</italic>) may directly bind <italic>ANT</italic>, <italic> CUC1</italic> and <italic>CUC2</italic> 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.</p> </abstract>