- Seminars - maillist.psb.ugent.be

PSB event reminder
by contact＠psb.vib-ugent.be 20 Sep '11

20 Sep '11

Calendar Name: seminars Scheduled for: Thursday, September 22 2011, 11:00 - 12:30 Event text: Prof Tom Beeckman VIB, Dept. of Plant Systems Biology Ghent University Gent BELGIUM Details: "Root branching controlled by the tips" ABSTRACT In the root, branching, i.e. de novo organogenesis or formation of lateral roots, is known to occur outside the apical meristem in a distinct monolayer of cells, designated as the pericycle. Not every pericycle cell becomes implicated into lateral root formation and it has been proposed that an auxin-dependent signaling mechanism will result in the specification of some cells as �founder cells�. Founder cell specification is not a continuous process but presents an oscillatory appearance that is proposed to be determinative for the longitudinal spacing of lateral roots along the primary root. However, the molecular mechanisms driving the periodical specification of founder cells remain largely elusive. Through a targeted transcript profiling approach, the Root Development group in Gent (Belgium) has obtained new insights into this very early step of lateral root formation. Our results support a hypothesis in which multiple tissue-specific successive auxin signaling modules are involved during the entire process of lateral root formation. The earliest auxin signaling module is situated in the root apex in proximity of the root apical meristem. Furthermore, a chemical compound screening unmasked the importance of precursor-to-auxin conversion activities in the very root tip. In summary, the root tip is a crucial activity centre that has a decisive role on the way roots colonize the surrounding soil.

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Symposium 7 Oct 2011: Sustainable agriculture for an innovative economy - Ghent, Belgium
by Delphine Verspeel 16 Sep '11

16 Sep '11

Symposium 7 Oct 2011: Sustainable agriculture for an innovative economy – an opportunity for Brazil and Belgium 7 Oct 2011 – Ghent, Belgium In Brazil, biotechnology is rapidly changing the face of the economy. From agriculture and biofuels to green chemistry, the country is leading the way in public-private partnerships in agricultural research and deployment of new products. On the other side of the world, Belgium has built an impressive track record of pioneering fundamental plant science. Belgian plant scientists are generating frontline knowledge that can form the basis of many innovations in sustainable agriculture and industry. The Institute of Plant Biotechnology for Developing Countries (IPBO), is organizing a symposium about cooperation between Belgium and Brazil in biotech. Aim is to foster the translation of fundamental plant science research into innovative applications for agriculture, cleaner chemical industry and mitigation of environmental impacts in both countries. Representatives from research organizations and companies from both countries will present case studies and opportunities for collaboration in biotech. The symposium is organized at the occasion of the launch of <http://www.europalia.be/brasil/?lang=en> Europalia.Brazil and a FWO and FRS-F.N.R.S. <http://www.science-belgium-brazil.be/> joint workshopon science cooperation between Belgium and Brazil. Attendance is free, but <http://www.vib.be/en/news/Pages/Symposium-Sustainable-agriculture-for-an-in…> registration is obligatory. Venue De Oude Vismijn St. Veerleplein 5, 9000 Gent (see <http://maps.google.be/maps?q=Sint-Veerleplein+5,+9000+Gent&hl=nl&ll=51.0567…> map) More info: <http://www.vib.be/brazil-belgium-biotech> www.vib.be/brazil-belgium-biotech

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Seminar Prof Tom Beeckman 22/09
by Delphine Verspeel 13 Sep '11

13 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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PSB event reminder
by contact＠psb.vib-ugent.be 12 Sep '11

12 Sep '11

Calendar Name: seminars Scheduled for: Monday, September 12 2011, 11:00 - 12:30 Event text: Prof Sheng Yang He Department of Energy Plant Research Laboratory Michigan State University Michigan USA Details: �Pathogenesis as a probe of plant biology� ABSTRACT Plants have evolved a powerful and multi-layered immune system to defend against infection by most microbial organisms. However, successful pathogens, such as the bacterial pathogen Pseudomonas syringae pv. tomato (Pst) strain DC3000, have developed specific virulence factors to overcome host immunity and cause diseases. During infection, Pst DC3000 produces several virulence factors to engage multiple host cell types and diverse host physical and chemical barriers. The bacterial type III secretion system (T3SS) delivers a battery of virulence "effector proteins" directly into the host cell. The phytotoxin coronatine mimics the plant hormone jasmonate. Study of the molecular action of effector proteins and coronatine highlights the utility of bacterial pathogenesis as a powerful probe of plant immunity, jasmonate signaling, cell biology, and stomatal guard cell signaling.

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PSB event reminder
by contact＠psb.vib-ugent.be 10 Sep '11

10 Sep '11

Calendar Name: seminars Scheduled for: Monday, September 12 2011, 11:00 - 12:30 Event text: Prof Sheng Yang He Department of Energy Plant Research Laboratory Michigan State University Michigan USA Details: �Pathogenesis as a probe of plant biology� ABSTRACT Plants have evolved a powerful and multi-layered immune system to defend against infection by most microbial organisms. However, successful pathogens, such as the bacterial pathogen Pseudomonas syringae pv. tomato (Pst) strain DC3000, have developed specific virulence factors to overcome host immunity and cause diseases. During infection, Pst DC3000 produces several virulence factors to engage multiple host cell types and diverse host physical and chemical barriers. The bacterial type III secretion system (T3SS) delivers a battery of virulence "effector proteins" directly into the host cell. The phytotoxin coronatine mimics the plant hormone jasmonate. Study of the molecular action of effector proteins and coronatine highlights the utility of bacterial pathogenesis as a powerful probe of plant immunity, jasmonate signaling, cell biology, and stomatal guard cell signaling.

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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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PSB event reminder
by contact＠psb.vib-ugent.be 31 Aug '11

31 Aug '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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Seminar Dr Martin Crespi 02/09
by Delphine Verspeel 26 Aug '11

26 Aug '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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