- Seminars - maillist.psb.ugent.be

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

13 Feb '12

Calendar Name: seminars Scheduled for: Monday, February 13 2012, 15:00 - 16:30 Event text: Dr Christine Granier Laboratory of Plant Ecophysiology under Environmental Stresses INRA Montpellier FRANCE Details: �Tackling leaf growth and its response to water stress: high-throughput phenotyping to the rescue� ABSTRACT Understanding the physiological and genetic bases of plant performance under drought is an important challenge in the context of global climate change. Genotypes with unaffected or increased whole plant leaf area could have an advantage in terms of plant performance under drought, at least in moderate or transitory water deficits scenarios. In order to perform a genetic engineering approach for breeding plants with maintained or increased leaf area under drought treatments, it is important to identify underlying processes that control leaf growth in response to drought and to classify them. Development of an automated phenotyping platforms and imaging techniques has provided new insights into the temporal and spatial patterns of leaf growth as affected by drought stresses in Arabidopsis thaliana. We have now access to a range of phenotypic traits that are measured at cellular, biophysical, physiological, and whole plant levels. Increasing the throughput of leaf growth analyses, i.e. increasing both the number of genotypes and the variety of traits, have contributed to a better understanding of how processes at different scales are coordinated to control leaf growth and its response to drought. Emerging properties at whole plant or whole leaf scales have been highlighted with evidence that the control of individual leaf expansion is more complex than merely the sum of cellular processes, and the control at the whole plant level is more complex than the sum of individual leaf expansions. When leaf expansion is maintained, this is due to a combination of responses involving traits at different scales.

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

11 Feb '12

Calendar Name: seminars Scheduled for: Monday, February 13 2012, 15:00 - 16:30 Event text: Dr Christine Granier Laboratory of Plant Ecophysiology under Environmental Stresses INRA Montpellier FRANCE Details: �Tackling leaf growth and its response to water stress: high-throughput phenotyping to the rescue� ABSTRACT Understanding the physiological and genetic bases of plant performance under drought is an important challenge in the context of global climate change. Genotypes with unaffected or increased whole plant leaf area could have an advantage in terms of plant performance under drought, at least in moderate or transitory water deficits scenarios. In order to perform a genetic engineering approach for breeding plants with maintained or increased leaf area under drought treatments, it is important to identify underlying processes that control leaf growth in response to drought and to classify them. Development of an automated phenotyping platforms and imaging techniques has provided new insights into the temporal and spatial patterns of leaf growth as affected by drought stresses in Arabidopsis thaliana. We have now access to a range of phenotypic traits that are measured at cellular, biophysical, physiological, and whole plant levels. Increasing the throughput of leaf growth analyses, i.e. increasing both the number of genotypes and the variety of traits, have contributed to a better understanding of how processes at different scales are coordinated to control leaf growth and its response to drought. Emerging properties at whole plant or whole leaf scales have been highlighted with evidence that the control of individual leaf expansion is more complex than merely the sum of cellular processes, and the control at the whole plant level is more complex than the sum of individual leaf expansions. When leaf expansion is maintained, this is due to a combination of responses involving traits at different scales.

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Seminar Prof Christian Hermans 27/02
by Delphine Verspeel 10 Feb '12

10 Feb '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 Marnik Vuylsteke 23/02
by Delphine Verspeel 10 Feb '12

10 Feb '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 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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