The photoperiod pathway modulate flowering time in response to nitrate

GRAS DE; RIVERAS E; VIDAL EA; MANCILLA Y; GUTIÉRREZ RG

Vancouver

Conferencia; 25th International Conference on Arabidopsis Research; 2014

Nitrogen (N) is an important macronutrient required for plant growth and development. N nutrient/metabolites can have a profound impact on root development, flowering time and other developmental programs. The flowering is the most critical aspect to ensure reproductive success. Plants have evolved complex regulatory mechanisms to bloom when conditions are most favorable. Although the mechanism that control the transition to flowering has been widely investigated, the underlying regulatory factors controlling flowering time in response to nitrate remain incompletely understood. In this study, we used systems biology and molecular genetics approaches to identify regulatory factors involved in N-control of flowering time in Arabidopsis. Our systems analyses suggest N signals interact with photoperiod pathway to control flowering time in Arabidopsis. We showed that these genes are regulated by nitrate. Genetic analyses of loss-of-function mutants indicate that these genes are important regulators of flowering time in response to nitrate. Our work defined a model for nitrate control of flowering time in Arabidopsis thaliana.