<html>
<blockquote type=cite cite>Seminario miercoles 8 de Octubre. 13 hs. Aula
del LFBM<br>
<br>
David Hannapel<br>
<br>
Iowa State University.<br>
title: "Full-length mobile RNA as a developmental signal"<br>
Abstract<br>
<br>
BEL1-like transcription factors are ubiquitous in plants and
interact<br>
with KNOTTED1-types to regulate numerous developmental processes.
In<br>
potato, the BEL1-like transcription factor, StBEL5, and its Knox<br>
protein partner regulate tuber formation by targeting genes that<br>
control growth. RNA detection methods and heterografting
experiments<br>
demonstrated that StBEL5 transcripts are present in phloem cells
and<br>
move across a graft union to localize in stolon tips, the site of<br>
tuber induction. This movement of RNA originates in leaf veins and<br>
petioles and is induced by a short-day photoperiod, regulated by
the<br>
untranslated regions, and correlated with enhanced tuber
production.<br>
Addition of the StBEL5 untranslated regions to another BEL1-like
mRNA<br>
resulted in its preferential transport to stolon tips and enhanced<br>
tuber production. The detection of several other full-length mRNAs<br>
from the KNOTTED1- and BEL1-like families in phloem sap indicates<br>
that what is known about mRNAs as long-distance signals is just the<br>
tip of the iceberg. <br>
<br>
Host: Martin Vazquez/Mercedes Rivero<br>
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<font face="Verdana" size=5><b>Martin P. Vazquez, Ph.D.<br>
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Lab 218, Piso 2<br>
Dto. de Fisiologia y Biologia molecular y Celular<br>
Facultad de Cs. Exactas y Naturales.<br>
Universidad de Buenos Aires.<br>
Int. Guiraldes 2620, Pabellon II.<br>
Ciudad Universitaria.<br>
C1428EGA, Buenos Aires<br>
ARGENTINA<br>
TE: 54 11 45763300 int 425<br>
<a href="http://www.fbmc.fcen.uba.ar/LBGT/">http://www.fbmc.fcen.uba.ar/LBGT/</a></font><br>
<font size=4><a href="http://web.mac.com/mpvazquez/bmei" eudora="autourl">http://web.mac.com/mpvazquez/bmei</a></font><br>
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__________ Información de NOD32, revisión 3493 (20081003)
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