- Seminars - maillist.psb.ugent.be

PSB event reminder
by contact＠psb.vib-ugent.be 19 Nov '10

19 Nov '10

Calendar Name: seminars Scheduled for: Friday, November 19 2010, 14:00 - 15:30 Event text: Catherine Rameau Institut Jean-Pierre Bourgin UMR1318 INRA-AgroParisTech Centre de Versailles-Grignon FRANCE Details: "The use of pea and Physcomitrella patens to study the evolution of strigolactone functions in land plants" ABSTRACT Strigolactones are small carotenoid derived molecules known to be produced by plant roots and released into the rhizosphere to play the same role of signalling the proximity of a host root in both symbiotic and parasitic interactions. They have been recently recognised as a novel plant hormone controlling shoot branching. For several years, we have been using garden pea (Pisum sativum) and a series of high branching mutants to study the control of axillary bud outgrowth and how strigolactones, auxin and cytokinin interact to regulate shoot branching. To investigate the presence and the role of strigolactones in a non-vascular plant, we have used the moss Physcomitrella patens, an experimental system well adapted to study the evolution of developmental mechanisms in plants. Using homologous recombination, we have obtained a knock-out mutant in the homologue of the CAROTENOID CLEAVAGE DIOXYGENASE 8 (CCD8) gene, encoding a strigolactone biosynthesis enzyme. The mutant phenotype is rescued by exsudates from wild type colonies, by exogenous supply of synthetic strigolactones or by ectopic expression of seed plant CCD8. Our data demonstrate P. patens produces strigolactones which act as signalling factors controlling both developmental and ecophysiological processes.

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PSB event reminder
by contact＠psb.vib-ugent.be 17 Nov '10

17 Nov '10

Calendar Name: seminars Scheduled for: Friday, November 19 2010, 14:00 - 15:30 Event text: Catherine Rameau Institut Jean-Pierre Bourgin UMR1318 INRA-AgroParisTech Centre de Versailles-Grignon FRANCE Details: "The use of pea and Physcomitrella patens to study the evolution of strigolactone functions in land plants" ABSTRACT Strigolactones are small carotenoid derived molecules known to be produced by plant roots and released into the rhizosphere to play the same role of signalling the proximity of a host root in both symbiotic and parasitic interactions. They have been recently recognised as a novel plant hormone controlling shoot branching. For several years, we have been using garden pea (Pisum sativum) and a series of high branching mutants to study the control of axillary bud outgrowth and how strigolactones, auxin and cytokinin interact to regulate shoot branching. To investigate the presence and the role of strigolactones in a non-vascular plant, we have used the moss Physcomitrella patens, an experimental system well adapted to study the evolution of developmental mechanisms in plants. Using homologous recombination, we have obtained a knock-out mutant in the homologue of the CAROTENOID CLEAVAGE DIOXYGENASE 8 (CCD8) gene, encoding a strigolactone biosynthesis enzyme. The mutant phenotype is rescued by exsudates from wild type colonies, by exogenous supply of synthetic strigolactones or by ectopic expression of seed plant CCD8. Our data demonstrate P. patens produces strigolactones which act as signalling factors controlling both developmental and ecophysiological processes.

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seminar Klaas Vandepoele 07/12
by Nathalie Vanden Hautte 12 Nov '10

12 Nov '10

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> . 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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FW: seminar Raf Roelands & Philippe Gabant 24/11
by Nathalie Vanden Hautte 09 Nov '10

09 Nov '10

LAST REMINDER!! From: Nathalie Vanden Hautte [mailto:nahau@psb.vib-ugent.be] Sent: donderdag 4 november 2010 16:12 To: _users(a)dmbr.ugent.be; meetings(a)psb.vib-ugent.be Subject: seminar Raf Roelands & Philippe Gabant 24/11 PLEASE CONFIRM YOUR ATTENDANCE BEFORE NOVEMBER 10 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> . 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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FW: seminar Raf Roelands & Philippe Gabant 24/11
by Nathalie Vanden Hautte 08 Nov '10

08 Nov '10

REMINDER From: Nathalie Vanden Hautte [mailto:nahau@psb.vib-ugent.be] Sent: donderdag 4 november 2010 16:12 To: _users(a)dmbr.ugent.be; meetings(a)psb.vib-ugent.be Subject: seminar Raf Roelands & Philippe Gabant 24/11 PLEASE CONFIRM YOUR ATTENDANCE BEFORE NOVEMBER 10 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> . 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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seminar Raf Roelands & Philippe Gabant 24/11
by Nathalie Vanden Hautte 04 Nov '10

04 Nov '10

PLEASE CONFIRM YOUR ATTENDANCE BEFORE NOVEMBER 10 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> . 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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seminar Catherine Rameau 19/11
by Nathalie Vanden Hautte 04 Nov '10

04 Nov '10

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> . 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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upcoming seminars November
by Nathalie Vanden Hautte 04 Nov '10

04 Nov '10

Dear All Enclosed you can find our upcoming seminars for November. Kind regards Nathalie ____________________________________________ Nathalie Vanden Hautte Administrative Assistant VIB, Department of Plant Systems Biology Ghent University Technologiepark 927 9052 Gent Belgium Phone: +32/9/33.13.800 Fax: +32/33.13.809 Http://www.psb.ugent.be nahau(a)psb.vib-ugent.be

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PSB event reminder
by contact＠psb.vib-ugent.be 25 Oct '10

25 Oct '10

Calendar Name: seminars Scheduled for: Monday, October 25 2010, 14:00 - 15:30 Event text: Alison M. Smith John Innes Centre Norwich UK Details: "How plants survive the night" ABSTRACT Although plants make sugars from atmospheric carbon dioxide in the process of photosynthesis, they face problems of carbohydrate supply on a daily basis. First, most of the cells in a plant are heterotrophic � dependent for their carbon supply on carbohydrate (in the form of sucrose) imported from the relatively small number of photosynthetic cells in the leaves. Second, plants can photosynthesise only during the day - every night all of the cells of the plant become dependent upon the mobilisation of carbohydrate (in the form of starch) synthesised and stored during the day. Mutant plants that cannot synthesise starch during the day or cannot degrade it at night usually have reduced growth rates. My lab is trying to understand the diurnal control of starch storage and mobilisation in leaves of the model plant Arabidopsis, using forward and reverse genetic approaches. I will present our progress in defining the surprisingly complex pathway of starch degradation at night, and discuss how flux through this pathway is controlled to ensure that supplies of carbohydrate last until dawn. Our recent work shows that the circadian clock plays a central role in controlling carbohydrate availability at night, and this in turn determines the overall productivity of the plant. Finally I will describe unexpected findings about the ways in which non-photosynthetic cells mobilise the sucrose they receive from the leaves.

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PSB event reminder
by contact＠psb.vib-ugent.be 23 Oct '10

23 Oct '10

Calendar Name: seminars Scheduled for: Monday, October 25 2010, 14:00 - 15:30 Event text: Alison M. Smith John Innes Centre Norwich UK Details: "How plants survive the night" ABSTRACT Although plants make sugars from atmospheric carbon dioxide in the process of photosynthesis, they face problems of carbohydrate supply on a daily basis. First, most of the cells in a plant are heterotrophic � dependent for their carbon supply on carbohydrate (in the form of sucrose) imported from the relatively small number of photosynthetic cells in the leaves. Second, plants can photosynthesise only during the day - every night all of the cells of the plant become dependent upon the mobilisation of carbohydrate (in the form of starch) synthesised and stored during the day. Mutant plants that cannot synthesise starch during the day or cannot degrade it at night usually have reduced growth rates. My lab is trying to understand the diurnal control of starch storage and mobilisation in leaves of the model plant Arabidopsis, using forward and reverse genetic approaches. I will present our progress in defining the surprisingly complex pathway of starch degradation at night, and discuss how flux through this pathway is controlled to ensure that supplies of carbohydrate last until dawn. Our recent work shows that the circadian clock plays a central role in controlling carbohydrate availability at night, and this in turn determines the overall productivity of the plant. Finally I will describe unexpected findings about the ways in which non-photosynthetic cells mobilise the sucrose they receive from the leaves.

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