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An integrative model of the control of ovule primordia formation
Author(s) -
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
Publication year - 2013
Publication title -
the plant journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.058
H-Index - 269
eISSN - 1365-313X
pISSN - 0960-7412
DOI - 10.1111/tpj.12309
Subject(s) - ovule , primordium , biology , auxin , microbiology and biotechnology , transcription factor , botany , gene , genetics , embryo
Summary 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 ( CUC 1 ), CUC 2 and AINTEGUMENTA ( ANT ) have additive effects on ovule primordia formation. We show that expression of the CUC 1 and CUC 2 genes is required to redundantly regulate expression of PINFORMED 1 ( PIN 1 ), which in turn is required for ovule primordia formation. Furthermore, our results suggest that the auxin response factor MONOPTEROS ( MP / ARF 5 ) may directly bind ANT , CUC 1 and CUC 2 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.