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.

An integrative model of the control of ovule primordia formation / F. Galbiati, D. Sinha Roy, S. Simonini, M. Cucinotta, L. Ceccato, C. Cuesta, M. Simaskova, E. Benkova, Y. Kamiuchi, M. Aida, D. Weijers, R. Simon, S. Masiero, L. Colombo. - In: PLANT JOURNAL. - ISSN 0960-7412. - 76:3(2013), pp. 446-455. [10.1111/tpj.12309]

An integrative model of the control of ovule primordia formation

F. Galbiati;M. Cucinotta;S. Masiero
Penultimo
;
L. Colombo
Ultimo
2013

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.
ovule development ; AINTEGUMENTA ; Arabidopsis ; CUP-SHAPED COTYLEDON ; PIN1 ; MONOPTEROS
Settore BIO/01 - Botanica Generale
Settore BIO/04 - Fisiologia Vegetale
Settore BIO/18 - Genetica
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/227616
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