e-journal

RAV genes: regulation of floral induction and beyond

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† Background: Transcription factors of the RAV (RELATED TO ABI3 AND VP1) family are plant-specific and
possess two DNA-binding domains. In Arabidopsis thaliana, the family comprises six members, including
TEMPRANILLO 1 (TEM1) and TEM2. Arabidopsis RAV1 and TEM1 have been shown to bind bipartite DNA
sequences, with the consensus motif C(A/C/G)ACA(N)2–8(C/A/T)ACCTG. Through direct binding to DNA,
RAV proteins act as transcriptional repressors, probably in complexes with other co-repressors.

† Scope and Conclusions: In this review, a summary is given of current knowledge of the regulation and function of RAV genes in diverse plant species, paying particular attention to their roles in the control of flowering in arabidopsis. TEM1 and TEM2 delay flowering by repressing the production of two florigenic molecules,FLOWERINGLOCUST (FT) and gibberellins. In thisway,TEM1andTEM2prevent precocious flowering and postpone floral induction until the plant has accumulated enough reserves or has reached a growth stage that ensures survival of the progeny. Recent results indicate that TEM1 and TEM2 are regulated by genes acting in several flowering pathways, suggesting that TEMs may integrate information from diverse pathways. However, flowering is not the only process controlled by RAV proteins. Family members are involved in other aspects of plant development, such as bud outgrowth in trees and leaf senescence, and possibly in general growth regulation. In addition, they respond to pathogen infections and abiotic stresses, including cold, dehydration, high salinity and osmotic stress.

Key words: RAV family, TEMPRANILLO genes, flowering, arabidopsis development, transcription factors,
biotic/abiotic stress, photoperiod, gibberellins, flower development.

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Informasi Detail

Judul Seri

Annals of Botany

No. Panggil

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Penerbit

Oxford : Oxford University Press on behalf of the Annals of Botany Company., 2014

Deskripsi Fisik

Annals of Botany 114: 1459–1470, 2014

Bahasa

English

ISBN/ISSN

doi:10.1093/aob/mcu0

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

114: 2014

Subjek

BOTANI

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

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