A genetic framework for flowering-time pathways in Citrus spp.

Genetics and Molecular Biology

Marcelo Carnier Dornelas²  Raquel Luciana Boscariol Camargo¹  Luciana Harumi Morimoto Figueiredo¹  Marco Aurélio Takita¹ 

[1] ,Universidade Estadual de Campinas Instituto de Biologia Departamento de Fisiologia VegetalCampinas SP ,Brazil

关键词: reproductive development;    flowering-time genes;    reproduction;    photoperiod;    CONSTANS;   

DOI  :  10.1590/S1415-47572007000500006

来源: SciELO

【 摘 要 】

Floral transition is one the most drastic changes occurring during the life cycle of a plant. The shoot apical meristem switches from the production of leaves with associated secondary shoot meristems to the production of flower meristems. This transition is abrupt and generally irreversible, suggesting it is regulated by a robust gene regulatory network capable of driving sharp transitions. The moment at which this transition occurs is precisely determined by environmental and endogenous signals. A large number of genes acting within these pathways have been cloned in model herbaceous plants such as Arabidopsis thaliana. In this paper, we report the results of our search in the Citrus expressed sequence tag (CitEST) database for expressed sequence tags (ESTs) showing sequence homology with known elements of flowering-time pathways. We have searched all sequence clusters in the CitEST database and identified more than one hundred Citrus spp sequences that codify putative conserved elements of the autonomous, vernalization, photoperiod response and gibberelic acid-controlled flowering-time pathways. Additionally, we have characterized in silico putative members of the Citrus spp homologs to the Arabidopsis CONSTANS family of transcription factors.

【 授权许可】

CC BY   
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