Document Detail

FLOWERING LOCUS T duplication coordinates reproductive and vegetative growth in perennial poplar.
MedLine Citation:
PMID:  21653885     Owner:  NLM     Status:  MEDLINE    
Annual plants grow vegetatively at early developmental stages and then transition to the reproductive stage, followed by senescence in the same year. In contrast, after successive years of vegetative growth at early ages, woody perennial shoot meristems begin repeated transitions between vegetative and reproductive growth at sexual maturity. However, it is unknown how these repeated transitions occur without a developmental conflict between vegetative and reproductive growth. We report that functionally diverged paralogs FLOWERING LOCUS T1 (FT1) and FLOWERING LOCUS T2 (FT2), products of whole-genome duplication and homologs of Arabidopsis thaliana gene FLOWERING LOCUS T (FT), coordinate the repeated cycles of vegetative and reproductive growth in woody perennial poplar (Populus spp.). Our manipulative physiological and genetic experiments coupled with field studies, expression profiling, and network analysis reveal that reproductive onset is determined by FT1 in response to winter temperatures, whereas vegetative growth and inhibition of bud set are promoted by FT2 in response to warm temperatures and long days in the growing season. The basis for functional differentiation between FT1 and FT2 appears to be expression pattern shifts, changes in proteins, and divergence in gene regulatory networks. Thus, temporal separation of reproductive onset and vegetative growth into different seasons via FT1 and FT2 provides seasonality and demonstrates the evolution of a complex perennial adaptive trait after genome duplication.
Chuan-Yu Hsu; Joshua P Adams; Hyejin Kim; Kyoungok No; Caiping Ma; Steven H Strauss; Jenny Drnevich; Lindsay Vandervelde; Jeffrey D Ellis; Brandon M Rice; Norman Wickett; Lee E Gunter; Gerald A Tuskan; Amy M Brunner; Grier P Page; Abdelali Barakat; John E Carlson; Claude W DePamphilis; Dawn S Luthe; Cetin Yuceer
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2011-06-08
Journal Detail:
Title:  Proceedings of the National Academy of Sciences of the United States of America     Volume:  108     ISSN:  1091-6490     ISO Abbreviation:  Proc. Natl. Acad. Sci. U.S.A.     Publication Date:  2011 Jun 
Date Detail:
Created Date:  2011-06-29     Completed Date:  2011-09-21     Revised Date:  2013-06-28    
Medline Journal Info:
Nlm Unique ID:  7505876     Medline TA:  Proc Natl Acad Sci U S A     Country:  United States    
Other Details:
Languages:  eng     Pagination:  10756-61     Citation Subset:  IM    
Department of Forestry, Mississippi State University, Mississippi State, MS 39762, USA.
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MeSH Terms
Arabidopsis / genetics,  growth & development,  physiology*
Arabidopsis Proteins / genetics,  physiology*
Gene Duplication*
Populus / genetics,  growth & development,  physiology
Reproduction / genetics
Reg. No./Substance:
0/Arabidopsis Proteins; 0/FT protein, Arabidopsis

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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