Publication Date:
2007-04-21
Description:
In plants, seasonal changes in day length are perceived in leaves, which initiate long-distance signaling that induces flowering at the shoot apex. The identity of the long-distance signal has yet to be determined. In Arabidopsis, activation of FLOWERING LOCUS T (FT) transcription in leaf vascular tissue (phloem) induces flowering. We found that FT messenger RNA is required only transiently in the leaf. In addition, FT fusion proteins expressed specifically in phloem cells move to the apex and move long distances between grafted plants. Finally, we provide evidence that FT does not activate an intermediate messenger in leaves. We conclude that FT protein acts as a long-distance signal that induces Arabidopsis flowering.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Corbesier, Laurent -- Vincent, Coral -- Jang, Seonghoe -- Fornara, Fabio -- Fan, Qingzhi -- Searle, Iain -- Giakountis, Antonis -- Farrona, Sara -- Gissot, Lionel -- Turnbull, Colin -- Coupland, George -- New York, N.Y. -- Science. 2007 May 18;316(5827):1030-3. Epub 2007 Apr 19.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max Planck Institute for Plant Breeding Research, Carl von Linne Weg 10, D-50829 Cologne, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17446353" target="_blank"〉PubMed〈/a〉
Keywords:
Arabidopsis/genetics/metabolism/*physiology
;
Arabidopsis Proteins/genetics/*metabolism
;
DNA-Binding Proteins/genetics/metabolism
;
Dexamethasone/pharmacology
;
Flowers/*growth & development
;
Gene Expression Regulation, Plant
;
Green Fluorescent Proteins/genetics
;
Membrane Transport Proteins/genetics
;
Meristem/metabolism
;
Models, Biological
;
Phloem/metabolism
;
Photoperiod
;
Plant Leaves/metabolism
;
Plant Proteins/genetics
;
Plant Shoots/metabolism
;
Plants, Genetically Modified
;
Promoter Regions, Genetic
;
RNA, Messenger/genetics/metabolism
;
RNA, Plant/genetics/metabolism
;
Recombinant Fusion Proteins/metabolism
;
*Signal Transduction
;
Transcription Factors/genetics/metabolism
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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