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Last update: May 2021

Menu Institutions

SPS - Saclay Plant Sciences

Gene Regulatory Network, in Reproductive Organs, During Sex Determination (GENDER)

Coordinator: Abdelhafid Bendahmane

Post-doc project selected in 2012 – Person recruited: Maria Victoria Gomez Choserot / Céline Camps

In melon, sex determination is governed by the a gene and the g gene, and the interplay of alleles of these two genes results in a range of sexual types. Cloning of the a gene revealed that andromonoecy results from a mutation in the active site of CmACS-7. The cloning of the g gene revealed that the transition from male to female flowers results from an epimutation of CmWIP1. We also showed that CmWIP1 represses CmACS-7 expression to allow stamen development. The goal of this project is to use the cloning of CmACS-7 and CmWIP1 as a starting point to understand how these two genes determine the sex of the plant. The proposed strategy relied on integrative analyses of datasets that we obtained from the combination of different omics tools and the validation of the concepts, using the TILLING approach.

Publications:

Boualem A., Fleurier S., Troadec C., Audigier P., Kumar A.P.K., Chatterjee M., Alsadon A.A., Sadder M.T., Wahb-Allah M.A., Al-Doss A.A., Bendahmane A. (2014). Development of a Cucumis sativus TILLinG Platform for Forward and Reverse Genetics. PLOS ONE 9(5): e97963.

Boualem A., Troadec C., Camps C., Lemhemdi A., Morin H., Sari M.A., Fraenkel-Zagouri R., Kovalski I., Dogimont C., Perl-Treves R., Bendahmane A. (2015). A cucurbit androecy gene reveals how unisexual flowers develop and dioecy emerges. Science 350(6261): 688-691.

Boualem A., Lemhemdi A., Sari M.A., Pignoly S., Troadec C., Abou Choucha F., Solmaz I., Sari N., Dogimont C., Bendahmane A. (2016). The Andromonoecious Sex Determination Gene Predates the Separation of Cucumis and Citrullus Genera. PLOS ONE 11(5): e0155444.

Latrasse D., Rodriguez-Granados N.Y., Veluchamy A., Mariappan K.G., Bevilacqua C., Crapart N., Camps C., Sommard V., Raynaud C., Dogimont C., Boualem A., Benhamed M., Bendahmane A. (2017). The quest for epigenetic regulation underlying unisexual flower development in Cucumis melo. Epigenetics Chromatin 10: 22.

Zhang J., Boualem A., Bendahmane A., Ming R. (2014). Genomics of sex determination. Current Opinion in Plant Biology 18: 110-116.

Communications in conferences:

Sex Chromosome workshop, San Diego 2016.

Other outputs:

Patent International_US 20140359896 A1: Bendahmane A, Troadec C, Boualem A, Hosemans D, Fauve J. (2014) Androecious cucurbit plants, methods of obtaining and uses of said cucurbit plants.