September 2011 - Seminars - maillist.psb.ugent.be

Seminar Prof Sheng Yang He 12/09
by Delphine Verspeel 06 Sep '11

06 Sep '11

You are receiving this e-mail because you subscribed to our seminars announcements and reminders service at <https://maillist.psb.ugent.be/mailman/listinfo/seminars> https://maillist.psb.ugent.be/mailman/listinfo/seminars. If you do not wish to receive this information anymore, please unsubscribe from future mailings at <https://maillist.psb.ugent.be/mailman/options/seminars> https://maillist.psb.ugent.be/mailman/options/seminars. cid:946540515@15122008-0D1C PSB cid:946540515@15122008-0D23 VIB - Department of Plant Systems Biology Technologiepark 927 B - 9052 Gent/Zwijnaarde Phone: +32 9 33 13 800 Fax: +32 9 33 13 809 Http://www.psb.vib-ugent.be

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invitation on a first come basis for a molecular farming workshop
by Delphine Verspeel 02 Sep '11

02 Sep '11

Dear all, Our Group is actively involved in the Cost FA804 action on Molecular Farming (2009-2012) and this year we were invited to organize the yearly Cost group meeting. In attach, you can find the near to finalized program, and up till now, we have 80 registrations. Attendance is possible if you register by replying to me and Sylvie, and the ones applying first will have priority when there are space limitations. Please indicate in your answer which part of the meeting you want to attend (first part on the 14th in VIB, second part on the 15th and 3rd part on the 16th of September in Poortacker Monasterium, because we need to know the number of coffees to prepare :-), and also let us know whether you will join a lunch (20 euro) and/ or a dinner (50 euro). Kind regards, Ann Prof. A. Depicker Department Plant Biotechnology and Bioinformatics in Ghent University Department Plant Systems Biologie in VIB Technologiepark 927 Gent 9052 Belgium 00 32 (0)9 33 13 940 www.psb.ugent.be

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PSB event reminder
by contact＠psb.vib-ugent.be 02 Sep '11

02 Sep '11

Calendar Name: seminars Scheduled for: Friday, September 2 2011, 14:00 - 15:30 Event text: Dr Martin Crespi Institut des Sciences V�g�tales CNRS Universit� Paris Gif sur Yvette/Paris FRANCE Details: �Impact of non-coding RNAs in root developmental plasticity� ABSTRACT Long non-protein coding RNAs (npcRNA) represent an emerging class of riboregulators, which act either directly in this long form or are processed to shorter miRNA and siRNAs. Plant and animals use small RNAs (microRNAs and siRNAs) as guide for post-transcriptional and epigenetic regulation. In plants, miRNAs and trans-acting siRNA (tasiRNA) result from different biogenesis pathways but both interact with target transcripts to direct their cleavage. Genome-wide bioinformatic analysis of full-length cDNA databases allowed us to identify 76 Arabidopsis long npcRNAs. Eleven npcRNAs were antisense to protein-coding mRNAs whereas certain corresponded to miRNA or siRNA precursors. In addition, numerous 24-nt siRNAs matched to five different npcRNAs. To link them to root developmental plasticity, we have shown that abiotic stresses and hormone treatments in roots altered the accumulation of 22 of these npcRNAs. Functional studies are ongoing to understand the regulatory mechanisms involving npcRNAs and their interacting RNA binding proteins in root tissues. We have identified an RNA-binding protein that interacts with an npcRNA that accumulates in nuclear �speckles� and controls auxin responses. In addition, one npcRNA expressed in root tissues corresponded to TAS3a, a tasiRNA precursor target of miR390. A feedback mechanism involving miR390/tasiRNAs and their ARF targets quantitatively controls lateral root emergence. Finally, the npcRNA43 locus was transcribed in sense/antisense orientation and its overexpression led to a developmental phenotype suggesting a novel compensatory mechanism mediated by an antisense RNA to control gene expression. We think that environmental control of long and small npcRNAs through interactions with RBPs may fine tune expression patterns of regulatory genes to modulate root developmental plasticity.

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