- Seminars - maillist.psb.ugent.be

seminar Prof Stanislaw Karpinski 24/06
by Nathalie Vanden Hautte 09 Jun '10

09 Jun '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 Atle M. Bones 18/06
by Nathalie Vanden Hautte 09 Jun '10

09 Jun '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 <Http://www.psb.vib-ugent.be>

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seminar Dr Alain Gojon 17/06
by Nathalie Vanden Hautte 01 Jun '10

01 Jun '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 June
by Nathalie Vanden Hautte 01 Jun '10

01 Jun '10

Dear All Enclosed you can find an overview of our upcoming seminars in June. 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 28 May '10

28 May '10

Calendar Name: seminars Scheduled for: Friday, May 28 2010, 14:00 - 15:30 Event text: Dr Rapha�l Mercier G�n�tique et Am�lioration des Plantes INRA - Centre de Versailles Grignon FRANCE Details: "Turning meiosis into mitosis and other games with meiosis" ABSTRACT Apomixis, or asexual clonal reproduction through seeds, is of immense interest due to its potential revolutionary application in agriculture. One key element of apomixis is apomeiosis, a deregulation of meiosis which results in a mitotic-like division. Meiosis halves the chromosome number because its two divisions follow a single round of DNA replication. This process involves two cell transitions, the prophase to meiosis I transition and the unique meiosis I to meiosis II transition. We show that OSD1 and the A-type cyclin CYCA1;2/TAM play a major role in both transitions in Arabidopsis. A series of osd and tam mutants failed to enter meiosis II and thus produced diploid spores and functional diploid gametes. These diploid spores had a recombined genotype produced through the single meiosis I division. Combining tam and osd1 mutations lead to a failure in the prophase to meiosis I transition during male meiosis and to the production of tetraploid spores and gametes. This suggests that TAM and OSD1 are involved in the control of both meiotic transitions. In addition, by combining either the osd or the tam mutation with two others affecting key meiotic processes (spo11-1 and rec8), we obtained plants producing diploid gametes through a mitotic-like division, that were genetically identical to their parents. The obtained plants, called MiMe-1 and MiMe-2 respectively, produce functional diploid gametes that are genetically identical to their mother. Creation of the MiMe genotypes and apomeiosis phenotype is an important step towards understanding and engineering apomixis.

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PSB event reminder
by contact＠psb.vib-ugent.be 26 May '10

26 May '10

Calendar Name: seminars Scheduled for: Friday, May 28 2010, 14:00 - 15:30 Event text: Dr Rapha�l Mercier G�n�tique et Am�lioration des Plantes INRA - Centre de Versailles Grignon FRANCE Details: "Turning meiosis into mitosis and other games with meiosis" ABSTRACT Apomixis, or asexual clonal reproduction through seeds, is of immense interest due to its potential revolutionary application in agriculture. One key element of apomixis is apomeiosis, a deregulation of meiosis which results in a mitotic-like division. Meiosis halves the chromosome number because its two divisions follow a single round of DNA replication. This process involves two cell transitions, the prophase to meiosis I transition and the unique meiosis I to meiosis II transition. We show that OSD1 and the A-type cyclin CYCA1;2/TAM play a major role in both transitions in Arabidopsis. A series of osd and tam mutants failed to enter meiosis II and thus produced diploid spores and functional diploid gametes. These diploid spores had a recombined genotype produced through the single meiosis I division. Combining tam and osd1 mutations lead to a failure in the prophase to meiosis I transition during male meiosis and to the production of tetraploid spores and gametes. This suggests that TAM and OSD1 are involved in the control of both meiotic transitions. In addition, by combining either the osd or the tam mutation with two others affecting key meiotic processes (spo11-1 and rec8), we obtained plants producing diploid gametes through a mitotic-like division, that were genetically identical to their parents. The obtained plants, called MiMe-1 and MiMe-2 respectively, produce functional diploid gametes that are genetically identical to their mother. Creation of the MiMe genotypes and apomeiosis phenotype is an important step towards understanding and engineering apomixis.

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PSB event reminder
by contact＠psb.vib-ugent.be 18 May '10

18 May '10

Calendar Name: seminars Scheduled for: Tuesday, May 18 2010, 11:00 - 12:30 Event text: Prof Richard C. Leegood Robert Hill Institute & Department of Animal and Plant Sciences University of Sheffield UK Details: "PEP Carboxykinase in Plants: An Enzyme for all Seasons" ABSTRACT Phosphoenolpyruvate carboxykinase (PEPCK) catalyses the reversible nucleotide triphosphate (GTP- or ATP-) -dependent decarboxylation of oxaloacetate to PEP and CO2. The ATP-dependent enzyme is present in flowering plants, fungi, algae and many bacteria, the related GTP-dependent enzyme in animal tissues. PEPCK is present in many plant tissues and appears to be located exclusively in the cytosol, although it may be plastidic in diatoms. It is regulated in some, but not all, plant tissues by reversible protein phosphorylation. Some of its functions in plants are well understood, such as its role in the photosynthetic CO2-concentrating mechanisms of C4 photosynthesis (including diatoms) and in Crassulacean Acid Metabolism. In these, PEPCK provides CO2 for the Calvin cycle by decarboxylating OAA derived from C4 acids. Its role in gluconeogenesis following germination of fat-storing seeds is also well studied. However, in recent years it has become clear that PEPCK is present in only certain types of cells and that its abundance is often dependent on developmental stage. It thus functions in far more metabolic processes in plants than was previously realised, but, as in many animal tissues, its function has been less easy to discern. Within leaves, although not abundant overall, it may be present in phloem companion cells, hydathodes, trichomes and stomata. In stomata, data from Arabidopsis knock-outs suggest that it plays an important role in stomatal closure. It has been identified in a range of tissues, such as developing seeds, flowers, roots, vascular tissue and fruit. In developing pea or grape seeds laying down storage proteins it is implicated in the metabolism of incoming nitrogenous compounds. This seminar will outline the regulation of the activity of PEPCK in plants and discuss some of its physiological functions.

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seminar Dr Alain Gojon 17/06
by Nathalie Vanden Hautte 17 May '10

17 May '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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PSB event reminder
by contact＠psb.vib-ugent.be 16 May '10

16 May '10

Calendar Name: seminars Scheduled for: Tuesday, May 18 2010, 11:00 - 12:30 Event text: Prof Richard C. Leegood Robert Hill Institute & Department of Animal and Plant Sciences University of Sheffield UK Details: "PEP Carboxykinase in Plants: An Enzyme for all Seasons" ABSTRACT Phosphoenolpyruvate carboxykinase (PEPCK) catalyses the reversible nucleotide triphosphate (GTP- or ATP-) -dependent decarboxylation of oxaloacetate to PEP and CO2. The ATP-dependent enzyme is present in flowering plants, fungi, algae and many bacteria, the related GTP-dependent enzyme in animal tissues. PEPCK is present in many plant tissues and appears to be located exclusively in the cytosol, although it may be plastidic in diatoms. It is regulated in some, but not all, plant tissues by reversible protein phosphorylation. Some of its functions in plants are well understood, such as its role in the photosynthetic CO2-concentrating mechanisms of C4 photosynthesis (including diatoms) and in Crassulacean Acid Metabolism. In these, PEPCK provides CO2 for the Calvin cycle by decarboxylating OAA derived from C4 acids. Its role in gluconeogenesis following germination of fat-storing seeds is also well studied. However, in recent years it has become clear that PEPCK is present in only certain types of cells and that its abundance is often dependent on developmental stage. It thus functions in far more metabolic processes in plants than was previously realised, but, as in many animal tissues, its function has been less easy to discern. Within leaves, although not abundant overall, it may be present in phloem companion cells, hydathodes, trichomes and stomata. In stomata, data from Arabidopsis knock-outs suggest that it plays an important role in stomatal closure. It has been identified in a range of tissues, such as developing seeds, flowers, roots, vascular tissue and fruit. In developing pea or grape seeds laying down storage proteins it is implicated in the metabolism of incoming nitrogenous compounds. This seminar will outline the regulation of the activity of PEPCK in plants and discuss some of its physiological functions.

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seminar Raphaël Mercier 28/05
by Nathalie Vanden Hautte 30 Apr '10

30 Apr '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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