e-journal

Molecular control of seasonal flowering in rice, arabidopsis and temperate cereals

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† Background: Rice (Oryza sativa) and Arabidopsis thaliana have been widely used as model systems to understand howplants controlflowering time in response to photoperiod and cold exposure. Extensive research has resulted in the isolation of several regulatory genes involved in flowering and for them to be organized into a molecular network responsive to environmental cues. When plants are exposed to favourable conditions, the network activates expression of florigenic proteins that are transported to the shoot apical meristem where they drive developmental reprogramming of a population of meristematic cells. Several regulatory factors are evolutionarily conserved between rice and arabidopsis. However, other pathways have evolved independently and confer specific characteristics to flowering responses.

† Scope: This review summarizes recent knowledge on the molecular mechanisms regulating daylength perception
and flowering time control in arabidopsis and rice. Similarities and differences are discussed between the regulatory networks of the two species and they are compared with the regulatory networks of temperate cereals, which are evolutionarily more similar to rice but have evolved in regions where exposure to low temperatures is crucial to confer competence to flower. Finally, the role of flowering time genes in expansion of rice cultivation to Northern latitudes is discussed.

†Conclusions: Understanding the mechanisms involved in photoperiodic flowering and comparing the regulatory
networks of dicots and monocots has revealed how plants respond to environmental cues and adapt to seasonal
changes. The molecular architecture of such regulation shows striking similarities across diverse species.
However, integration of specific pathways on a basal scheme is essential for adaptation to different environments. Artificial manipulation of flowering time by means of natural genetic resources is essential for expanding the cultivation of cereals across different environments.

Key words: Oryza sativa, rice, Arabidopsis thaliana, cereals, photoperiodic flowering, vernalization, florigen, 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: 1445–1458, 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

Lampiran Berkas

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