- Seminars - maillist.psb.ugent.be

PSB event reminder
by contact＠psb.vib-ugent.be 10 Feb '12

10 Feb '12

Calendar Name: seminars Scheduled for: Friday, February 10 2012, 13:30 - 15:00 Event text: Prof Karin Krupinska Institute of Botany University of Kiel Kiel GERMANY Details: " Involvement of the Whirly proteins in communication between the organelles and the nucleus within the plant cell" ABSTRACT Besides a nuclear genome and a mitochondrial genome plant cells have a third genome in their plastids. For coordination of the activities of the three genomes the DNA containing compartments need to exchange information. Whirly proteins form a small family of nucleic acid binding proteins with two to three members exclusively found in higher plants. Investigations on their subcellular localization and their effects on gene expression indicate that the Whirly proteins play a role in transduction of information between organelles and nucleus. After a general introduction on intracellular communication recent results on Whirly1 will be presented. Whirly1 has been identified originally as a nuclear activator of pathogen response genes. Later it was shown that Whirly1 is targeted to plastids and that it has the same molecular weight in plastids and the nucleus, respectively. To investigate whether plastid located Whirly1 might be translocated to the nucleus, we constructed transplastomic tobacco plants synthesizing an HA-tagged version of Whirly1 inside the plastid. Immunological analyses revealed that the tagged protein is also contained in nuclei. Our results give support for a retrograde protein translocation pathway from plastids to the nucleus.

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PSB event reminder
by contact＠psb.vib-ugent.be 08 Feb '12

08 Feb '12

Calendar Name: seminars Scheduled for: Friday, February 10 2012, 13:30 - 15:00 Event text: Prof Karin Krupinska Institute of Botany University of Kiel Kiel GERMANY Details: " Involvement of the Whirly proteins in communication between the organelles and the nucleus within the plant cell" ABSTRACT Besides a nuclear genome and a mitochondrial genome plant cells have a third genome in their plastids. For coordination of the activities of the three genomes the DNA containing compartments need to exchange information. Whirly proteins form a small family of nucleic acid binding proteins with two to three members exclusively found in higher plants. Investigations on their subcellular localization and their effects on gene expression indicate that the Whirly proteins play a role in transduction of information between organelles and nucleus. After a general introduction on intracellular communication recent results on Whirly1 will be presented. Whirly1 has been identified originally as a nuclear activator of pathogen response genes. Later it was shown that Whirly1 is targeted to plastids and that it has the same molecular weight in plastids and the nucleus, respectively. To investigate whether plastid located Whirly1 might be translocated to the nucleus, we constructed transplastomic tobacco plants synthesizing an HA-tagged version of Whirly1 inside the plastid. Immunological analyses revealed that the tagged protein is also contained in nuclei. Our results give support for a retrograde protein translocation pathway from plastids to the nucleus.

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PSB event reminder
by contact＠psb.vib-ugent.be 31 Jan '12

31 Jan '12

Calendar Name: seminars Scheduled for: Tuesday, January 31 2012, 12:00 - 13:30 Event text: Dr Jose Gutierrez-Marcos School of Life Sciences University of Warwick Warwick UK Details: �Epigenetic basis of adaptation to stress in plants� ABSTRACT Plants are sessile organisms that are known for their adaptive plasticity to the changing environment. In addition to directly influencing on plant growth, environmental changes not only influence gene expression patterns but also affect the stability of the genome. Both of these responses are mediated by epigenetic mechanisms which can also cause phenotypic changes that can be transmitted and remain stable for several generations. In this respect, the formation of �environmental epialleles� and their maintenance represents an important, albeit unexplored, source of variation and adaptive power that can be manipulated to improve the way plants adapt to a changing environment. However, the precise mechanisms regulating this epigenetic phenomenon remain unknown. We have investigated the impact that abiotic environmental stress has on the formation of new allelic variants by the genome-wide epigenetic profiling. Our recent work provides evidence of small RNAs directly involved in directing DNA methylation to discrete loci of the maize genome. I will discuss the possible mechanism(s) by which environmental change is able to destabilize the plant epigenome and contribute to the so-called �epigenetic memory� and adaptation to stress in plants.

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Seminar Dr Christine Granier 13/2
by Delphine Verspeel 30 Jan '12

30 Jan '12

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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Seminar Prof Karin Krupinska 10/2
by Delphine Verspeel 30 Jan '12

30 Jan '12

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 29 Jan '12

29 Jan '12

Calendar Name: seminars Scheduled for: Tuesday, January 31 2012, 12:00 - 13:30 Event text: Dr Jose Gutierrez-Marcos School of Life Sciences University of Warwick Warwick UK Details: �Epigenetic basis of adaptation to stress in plants� ABSTRACT Plants are sessile organisms that are known for their adaptive plasticity to the changing environment. In addition to directly influencing on plant growth, environmental changes not only influence gene expression patterns but also affect the stability of the genome. Both of these responses are mediated by epigenetic mechanisms which can also cause phenotypic changes that can be transmitted and remain stable for several generations. In this respect, the formation of �environmental epialleles� and their maintenance represents an important, albeit unexplored, source of variation and adaptive power that can be manipulated to improve the way plants adapt to a changing environment. However, the precise mechanisms regulating this epigenetic phenomenon remain unknown. We have investigated the impact that abiotic environmental stress has on the formation of new allelic variants by the genome-wide epigenetic profiling. Our recent work provides evidence of small RNAs directly involved in directing DNA methylation to discrete loci of the maize genome. I will discuss the possible mechanism(s) by which environmental change is able to destabilize the plant epigenome and contribute to the so-called �epigenetic memory� and adaptation to stress in plants.

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FW: Upcoming seminars February 2012
by Delphine Verspeel 26 Jan '12

26 Jan '12

Dear All, Enclosed the updated list for February. Kind regards, Delphine ___________________________________________ Delphine Verspeel Administrative Assistant VIB, Department of Plant Systems Biology Ghent University Technologiepark 927 9052 Gent Belgium Phone: +32/9/33.13.800 Fax: +32/9/33.13.809 Http://www.psb.ugent.be <http://www.psb.ugent.be/> despe(a)psb.vib-ugent.be <mailto:nahau@psb.vib-ugent.be> From: seminars-bounces(a)psb.vib-ugent.be [mailto:seminars-bounces@psb.vib-ugent.be] On Behalf Of Delphine Verspeel Sent: vrijdag 20 januari 2012 11:07 To: meetings(a)psb.vib-ugent.be Subject: [Seminars] Upcoming seminars February 2012 Dear All, Enclosed you can find our upcoming seminars for February. Kind regards, Delphine ____________________________________________ Delphine Verspeel 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 despe(a)psb.vib-ugent.be <mailto:nahau@psb.vib-ugent.be>

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PSB event reminder
by contact＠psb.vib-ugent.be 26 Jan '12

26 Jan '12

Calendar Name: seminars Scheduled for: Thursday, January 26 2012, 11:00 - 12:30 Event text: Dr Eva Benkova VIB, Dept. of Plant Systems Biology Ghent University Gent BELGIUM Details: " Auxin - cytokinin interaction shaping root architecture" ABSTRACT Plant development is characterized by a continuous growth and flexible adjustments of the plant architecture in response to the environment. Plants are able to maintain permanent stem cell populations, dedifferentiate already committed cells and, not least, to regenerate or form organs de novo. These developmental processes are governed and coordinated by signalling substances called plant hormones. Typically, in certain developmental processes more than one hormone is involved and, thus, coordination of their overlapping activities is crucial for correct plant development. Multiple hormones including cytokinin and auxin have been implicated in the regulation of root development however, molecular mechanisms underlying the hormonal cross-talk are only poorly understood. The main aim of our studies is to reveal the molecular components and mechanisms balancing the output of auxin and cytokinin pathways in order to regulate plant organogenesis. We use lateral root organogenesis in Arabidopsis as an ideally suited model system for these questions, because it encompasses fundamental aspects of plant development, such as dedifferentiation, re-entry into the cell cycle, coordinated cell divisions and differentiation, and is in antagonistic manner regulated by auxin and cytokinin. Recent insights into mechanisms of auxin and cytokinin cross-talk during lateral root organogenesis will be discussed.

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PSB event reminder
by contact＠psb.vib-ugent.be 24 Jan '12

24 Jan '12

Calendar Name: seminars Scheduled for: Thursday, January 26 2012, 11:00 - 12:30 Event text: Dr Eva Benkova VIB, Dept. of Plant Systems Biology Ghent University Gent BELGIUM Details: " Auxin - cytokinin interaction shaping root architecture" ABSTRACT Plant development is characterized by a continuous growth and flexible adjustments of the plant architecture in response to the environment. Plants are able to maintain permanent stem cell populations, dedifferentiate already committed cells and, not least, to regenerate or form organs de novo. These developmental processes are governed and coordinated by signalling substances called plant hormones. Typically, in certain developmental processes more than one hormone is involved and, thus, coordination of their overlapping activities is crucial for correct plant development. Multiple hormones including cytokinin and auxin have been implicated in the regulation of root development however, molecular mechanisms underlying the hormonal cross-talk are only poorly understood. The main aim of our studies is to reveal the molecular components and mechanisms balancing the output of auxin and cytokinin pathways in order to regulate plant organogenesis. We use lateral root organogenesis in Arabidopsis as an ideally suited model system for these questions, because it encompasses fundamental aspects of plant development, such as dedifferentiation, re-entry into the cell cycle, coordinated cell divisions and differentiation, and is in antagonistic manner regulated by auxin and cytokinin. Recent insights into mechanisms of auxin and cytokinin cross-talk during lateral root organogenesis will be discussed.

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Upcoming seminars February 2012
by Delphine Verspeel 20 Jan '12

20 Jan '12

Dear All, Enclosed you can find our upcoming seminars for February. Kind regards, Delphine ____________________________________________ Delphine Verspeel 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 despe(a)psb.vib-ugent.be <mailto:nahau@psb.vib-ugent.be>

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