- Seminars - maillist.psb.ugent.be

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

08 Oct '12

Calendar Name: seminars Scheduled for: Monday, October 8 2012, 11:00 - 12:30 Event text: Prof Jaakko Kangasj�rvi Division of Plant Biology Department of Biosciences University of Helsinki Helsinki FINLAND Details: �Apoplastic ROS and cellular signaling � processes and components involved � ABSTRACT Effective responses to external and internal stimuli will ensure optimal growth and survival in an environment where productivity and product quality are adversely affected by stresses. Plants must have effective means of adapting to changes in their environment. The main features of such defense strategies involve early recognition and perception of the developing stress, and subsequent activation of induced adaptive and defensive responses. Strong evidence has accumulated that ROS play an important role in the signaling under both abiotic and biotic stresses. The air pollutant ozone generates reactive oxygen species (ROS) in the apoplast. Consequently, ozone has been used as a tool to unravel in planta ROS-induced processes and apoplastic ROS sensing. Examples of identification of the molecular identity of some components, and interaction between multiple regulatory cascades involving apoplastic ROS, discovered with this approach are presented.

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PSB event reminder
by contact＠psb.vib-ugent.be 06 Oct '12

06 Oct '12

Calendar Name: seminars Scheduled for: Monday, October 8 2012, 11:00 - 12:30 Event text: Prof Jaakko Kangasj�rvi Division of Plant Biology Department of Biosciences University of Helsinki Helsinki FINLAND Details: �Apoplastic ROS and cellular signaling � processes and components involved � ABSTRACT Effective responses to external and internal stimuli will ensure optimal growth and survival in an environment where productivity and product quality are adversely affected by stresses. Plants must have effective means of adapting to changes in their environment. The main features of such defense strategies involve early recognition and perception of the developing stress, and subsequent activation of induced adaptive and defensive responses. Strong evidence has accumulated that ROS play an important role in the signaling under both abiotic and biotic stresses. The air pollutant ozone generates reactive oxygen species (ROS) in the apoplast. Consequently, ozone has been used as a tool to unravel in planta ROS-induced processes and apoplastic ROS sensing. Examples of identification of the molecular identity of some components, and interaction between multiple regulatory cascades involving apoplastic ROS, discovered with this approach are presented.

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Seminar Dr Arp Schnittger
by Delphine Verspeel 02 Oct '12

02 Oct '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 Jaakko Kangasjärvi
by Delphine Verspeel 25 Sep '12

25 Sep '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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Upcoming seminars October
by Delphine Verspeel 25 Sep '12

25 Sep '12

Dear All, Enclosed you can find our upcoming seminars for October. 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 despe(a)psb.vib-ugent.be

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PSB event reminder
by contact＠psb.vib-ugent.be 21 Sep '12

21 Sep '12

Calendar Name: seminars Scheduled for: Friday, September 21 2012, 14:00 - 15:30 Event text: Dr Edouard Pesquet Umea Plant Science Centre Department of Plant Physiology Umea University Umea SWEDEN Details: �Mechanisms controlling xylem vessels secondary cell wall patterning and synthesis� ABSTRACT Xylem is essential for transporting water and minerals as well as for mechanical resistance of plants against gravity. These key characteristics of xylem vessels are enabled by three consecutive developmental events which lead to i) the development of specific secondary cell walls which exhibit different type of patterned thickening, ii) the programmed cell death (PCD) to hollow out the cell content and iii) the lignification to reinforce and waterproof its wall for optimal sap conduction. Disturbance of any of these processes greatly impairs xylem vessels function. Using a novel in vitro xylogenic system derived from stable Arabidopsis thaliana cell lines, the mechanisms controlling xylem vessel secondary cell wall patterning and synthesis are studied using a combination of live-cell imaging, pharmacological treatments and genetic studies. Cortical microtubules, through two microtubules interacting proteins MAP70-1 and MAP70-5, control the patterning of xylem vessel secondary cell wall whose deposition is pursued long after cell death.

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PSB event reminder
by contact＠psb.vib-ugent.be 19 Sep '12

19 Sep '12

Calendar Name: seminars Scheduled for: Friday, September 21 2012, 14:00 - 15:30 Event text: Dr Edouard Pesquet Umea Plant Science Centre Department of Plant Physiology Umea University Umea SWEDEN Details: �Mechanisms controlling xylem vessels secondary cell wall patterning and synthesis� ABSTRACT Xylem is essential for transporting water and minerals as well as for mechanical resistance of plants against gravity. These key characteristics of xylem vessels are enabled by three consecutive developmental events which lead to i) the development of specific secondary cell walls which exhibit different type of patterned thickening, ii) the programmed cell death (PCD) to hollow out the cell content and iii) the lignification to reinforce and waterproof its wall for optimal sap conduction. Disturbance of any of these processes greatly impairs xylem vessels function. Using a novel in vitro xylogenic system derived from stable Arabidopsis thaliana cell lines, the mechanisms controlling xylem vessel secondary cell wall patterning and synthesis are studied using a combination of live-cell imaging, pharmacological treatments and genetic studies. Cortical microtubules, through two microtubules interacting proteins MAP70-1 and MAP70-5, control the patterning of xylem vessel secondary cell wall whose deposition is pursued long after cell death.

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

13 Sep '12

Calendar Name: seminars Scheduled for: Thursday, September 13 2012, 11:00 - 12:30 Event text: Prof Michele Morgante Dipartimento di Scienze Agrarie ed Ambientali Universit� di Udine Istituto di Genomica Applicata Parco Scientifico di Udine Udine ITALY Details: �The plant pan-genomes: from one for all to all for one� ABSTRACT The analysis of variation in plants has revealed that their genomes are characterised by high levels of structural variation, consisting of both smaller insertion/deletions, mostly due to recent insertions of transposable elements, and of larger insertion/deletion similar to those termed in humans Copy Number Variants (CNVs). These observations indicate that a single genome sequence might not reflect the entire genomic complement of a species, and prompted us to introduce the concept of the plant pan-genome, including core genomic features common to all individuals and a Dispensable Genome (DG) composed of partially shared and/or non shared DNA sequence elements. The very active transposable element systems present in many plant genomes may account for a large fraction of the DG. The mechanisms by which the CNV-like variants are generated and the direction of the mutational events are still unknown. Uncovering the intriguing nature of the DG, i.e. its composition, origin and function, represents a step forward towards an understanding of the processes generating genetic diversity and phenotypic variation. Additionally, since the DG clearly appears to be for the most part the youngest and most dynamic component of the pan genome, it is of great interest to understand whether it is a major contributor to the creation of new genetic variation in plant evolution as well as in the artificial selection processes of plant breeding. We will discuss the extent and composition of the pan genome in different plant species, the different mechanisms that generate and maintain the dispensable portion, the phenotypic effects of the DG and the rates and modes of creation of new genetic variation due to DG components.

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

11 Sep '12

Calendar Name: seminars Scheduled for: Thursday, September 13 2012, 11:00 - 12:30 Event text: Prof Michele Morgante Dipartimento di Scienze Agrarie ed Ambientali Universit� di Udine Istituto di Genomica Applicata Parco Scientifico di Udine Udine ITALY Details: �The plant pan-genomes: from one for all to all for one� ABSTRACT The analysis of variation in plants has revealed that their genomes are characterised by high levels of structural variation, consisting of both smaller insertion/deletions, mostly due to recent insertions of transposable elements, and of larger insertion/deletion similar to those termed in humans Copy Number Variants (CNVs). These observations indicate that a single genome sequence might not reflect the entire genomic complement of a species, and prompted us to introduce the concept of the plant pan-genome, including core genomic features common to all individuals and a Dispensable Genome (DG) composed of partially shared and/or non shared DNA sequence elements. The very active transposable element systems present in many plant genomes may account for a large fraction of the DG. The mechanisms by which the CNV-like variants are generated and the direction of the mutational events are still unknown. Uncovering the intriguing nature of the DG, i.e. its composition, origin and function, represents a step forward towards an understanding of the processes generating genetic diversity and phenotypic variation. Additionally, since the DG clearly appears to be for the most part the youngest and most dynamic component of the pan genome, it is of great interest to understand whether it is a major contributor to the creation of new genetic variation in plant evolution as well as in the artificial selection processes of plant breeding. We will discuss the extent and composition of the pan genome in different plant species, the different mechanisms that generate and maintain the dispensable portion, the phenotypic effects of the DG and the rates and modes of creation of new genetic variation due to DG components.

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Seminar Dr Edouard Pesquet
by Delphine Verspeel 10 Sep '12

10 Sep '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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