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Plant and Cell Physiology Advance Access originally published online on August 12, 2008
Plant and Cell Physiology 2008 49(9):1263-1271; doi:10.1093/pcp/pcn116
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© The Author 2008. Published by Oxford University Press on behalf of Japanese Society of Plant Physiologists. All rights reserved. For permissions, please email: journals.permissions@oxfordjournals.org

Mini-Review

Transcriptional Regulation of Storage Protein Synthesis During Dicotyledon Seed Filling

Jérôme Verdier and Richard D. Thompson*

Unité Mixte de Recherche en Génétique et Ecophysiologie des Légumineuses à Graines (UMR-LEG), Institut National de la Recherche Agronomique (INRA), BP 86510, F-21065 Dijon, France

*Corresponding author: E-mail, thompson{at}epoisses.inra.fr; Fax, +33-380-693-263.


  Abstract

Seeds represent a major source of nutrients for human and animal livestock diets. The nutritive value of seeds is largely due to storage products which accumulate during a key phase of seed development, seed filling. In recent years, our understanding of the mechanisms regulating seed filling has advanced significantly due to the diversity of experimental approaches used. This review summarizes recent findings related to transcription factors that regulate seed storage protein accumulation. A framework for the regulation of storage protein synthesis is established which incorporates the events before, during and after seed storage protein synthesis. The transcriptional control of storage protein synthesis is accompanied by physiological and environmental controls, notably through the action of plant hormones and other intermediary metabolites. Finally, recent post-genomics analyses on different model plants have established the existence of a conserved seed filling process involving the master regulators (LEC1, LEC2, ABI3 and FUS3) but also revealed certain differences in fine regulation between plant families.

Keywords: Dicotyledons - Seed storage proteins - Transcription factors

Abbreviations: ABI3, ABSCISIC ACID-INSENSITIVE3; ABI5, ABSCISIC ACID-INSENSITIVE5; ABRE, ABA response element; AFLP, amplified fragment length polymorphism; BZIP, basic zipper; CBF, CCAAT-binding factor; DAP, days after pollination; FUS3, FUSCA3; HAP, heme-activated protein; LEC1, LEAFY COTYLEDON1; LEC2, LEAFY COTYLEDON2; PvALF, P. vulgaris ABI3-like factor; RT–PCR, reverse transcription–PCR; ROM, repressor of maturation gene; SSP, seed storage protein; TF, transcription factor.

(Received June 12, 2008; Accepted August 8, 2008)
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