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Starch metabolism and antiflorigenic signals modulate the juvenile-to-adult phase transition in Arabidopsis
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Matsoukas, Ioannis G., Massiah, Andrea J. and Thomas, Brian (2013) Starch metabolism and antiflorigenic signals modulate the juvenile-to-adult phase transition in Arabidopsis. Plant, Cell & Environment, Volume 36 (Number 10). pp. 1802-1811. doi:10.1111/pce.12088 ISSN 0140-7791.
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Official URL: http://dx.doi.org/10.1111/pce.12088
Abstract
The physiology and genetics underlying juvenility is poorly understood. Here we exploit Arabidopsis as a system to understand the mechanisms that regulate floral incompetence during juvenility. Using an experimental assay that allows the length of juvenility to be estimated, and mutants impaired in different pathways, we show that multiple inputs influence juvenility. Juvenile phase lengths of wild type (WT) accessions Col-0, Ler-0 and Ws-4 are shown to differ, with Col-0 having the shortest and Ws-4 the longest length. Plants defective in sugar signalling [gin1-1, gin2-1, gin6 (abi4)] and floral repressor mutants [hst1, tfl1, tfl2 (lhp1)] showed shortened juvenile phase lengths, compared to their respective WTs. Mutants defective in starch anabolism (adg1-1, pgm1) and catabolism (sex1, sex4, bam3) showed prolonged juvenile phase lengths compared to Col-0. Examination of diurnal metabolite changes in adg1-1 and sex1 mutants indicates that their altered juvenile phase length may be due to lack of starch turnover, which influences carbohydrate availability. In this article we propose a model in which a variety of signals including floral activators and repressors modulate the juvenile-to-adult phase transition. The role of carbohydrates may be in their capacity as nutrients, osmotic regulators, signalling molecules and/ or through their interaction with phytohormonal networks.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > Q Science (General) Q Science > QD Chemistry Q Science > QK Botany Q Science > QP Physiology Q Science > QR Microbiology S Agriculture > SB Plant culture S Agriculture > SD Forestry |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||
| Journal or Publication Title: | Plant, Cell & Environment | ||||
| Publisher: | Wiley-Blackwell Publishing Ltd. | ||||
| ISSN: | 0140-7791 | ||||
| Official Date: | 2013 | ||||
| Dates: |
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| Volume: | Volume 36 | ||||
| Number: | Number 10 | ||||
| Page Range: | pp. 1802-1811 | ||||
| DOI: | 10.1111/pce.12088 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | Hellenic Scholarships Foundation, DEFRA, The University of Warwick |
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