- Seminars - maillist.psb.ugent.be

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

10 Sep '12

Calendar Name: seminars Scheduled for: Monday, September 10 2012, 15:00 - 16:30 Event text: Dr Paul Berkman CSIRO Plant Industry Queensland Bioscience Precinct St. Lucia QLD AUSTRALIA Details: �Polyploid genomes: where are they and where are they going?� ABSTRACT Genome duplications are recognised as a key driver in evolution and are understood to have occurred in the history of nearly all flowering plants, providing a template from which greater adaptability can be established. While some polyploid species have developed stable inheritance patterns, as is the case in wheat and brassica, inheritance in other species such as sugarcane remains complicated. Recent developments in genomics and sequencing are enabling the investigation of polyploid evolution, particularly in stable polyploids. However many analysis frameworks still rely on methodology and statistics developed with diploid species in mind. I will present some of my work to develop new approaches to investigate the state of polyploid genomes, namely inheritance patterns in high ploidy species, and the principles acting in the process of diploidisation.

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

08 Sep '12

Calendar Name: seminars Scheduled for: Monday, September 10 2012, 15:00 - 16:30 Event text: Dr Paul Berkman CSIRO Plant Industry Queensland Bioscience Precinct St. Lucia QLD AUSTRALIA Details: �Polyploid genomes: where are they and where are they going?� ABSTRACT Genome duplications are recognised as a key driver in evolution and are understood to have occurred in the history of nearly all flowering plants, providing a template from which greater adaptability can be established. While some polyploid species have developed stable inheritance patterns, as is the case in wheat and brassica, inheritance in other species such as sugarcane remains complicated. Recent developments in genomics and sequencing are enabling the investigation of polyploid evolution, particularly in stable polyploids. However many analysis frameworks still rely on methodology and statistics developed with diploid species in mind. I will present some of my work to develop new approaches to investigate the state of polyploid genomes, namely inheritance patterns in high ploidy species, and the principles acting in the process of diploidisation.

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

06 Sep '12

Calendar Name: seminars Scheduled for: Thursday, September 6 2012, 14:00 - 15:30 Event text: Prof Alexander Vainstein Institute of Plant Sciences and Genetics in Agriculture The Robert H. Smith Faculty of Agriculture, Food and Environment The Hebrew University of Jerusalem Rehovot Israel Details: POSTDOC INNOVATION SEMINAR �Permanent genome modifications in plant cells by transient viral vectors� ABSTRACT The ability to modify genome sequences in plant cells is fundamental to modern agriculture. Naturally occurring and artificial rare-cutting endonucleases (i.e. zinc finger nuclease, homing endonuclease or TAL effector nuclease) have been used for targeted mutagenesis in model and crop species. However, stable transformation is the preferred method for gene expression in plant species, and nuclease-expressing transgenic plants have been used for recovery of mutants that are likely to be classified as transgenic due to the use of direct gene-transfer methods into the target cells. We developed an alternative, non-transgenic approach for nuclease delivery and production of mutant plants using a novel Tobacco rattle virus (TRV)-based expression system for indirect transient delivery of nucleases into a variety of tissues and cells of intact plants. Since viral vectors can spread into the growing and developing tissues of infected plants, the novel approach of genome-editing provides a unique opportunity to bypass the regeneration step that is often required in direct gene-transfer methods.

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PSB event reminder
by contact＠psb.vib-ugent.be 04 Sep '12

04 Sep '12

Calendar Name: seminars Scheduled for: Thursday, September 6 2012, 14:00 - 15:30 Event text: Prof Alexander Vainstein Institute of Plant Sciences and Genetics in Agriculture The Robert H. Smith Faculty of Agriculture, Food and Environment The Hebrew University of Jerusalem Rehovot Israel Details: POSTDOC INNOVATION SEMINAR �Permanent genome modifications in plant cells by transient viral vectors� ABSTRACT The ability to modify genome sequences in plant cells is fundamental to modern agriculture. Naturally occurring and artificial rare-cutting endonucleases (i.e. zinc finger nuclease, homing endonuclease or TAL effector nuclease) have been used for targeted mutagenesis in model and crop species. However, stable transformation is the preferred method for gene expression in plant species, and nuclease-expressing transgenic plants have been used for recovery of mutants that are likely to be classified as transgenic due to the use of direct gene-transfer methods into the target cells. We developed an alternative, non-transgenic approach for nuclease delivery and production of mutant plants using a novel Tobacco rattle virus (TRV)-based expression system for indirect transient delivery of nucleases into a variety of tissues and cells of intact plants. Since viral vectors can spread into the growing and developing tissues of infected plants, the novel approach of genome-editing provides a unique opportunity to bypass the regeneration step that is often required in direct gene-transfer methods.

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Seminar Prof Michele Morgante
by Delphine Verspeel 04 Sep '12

04 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 . If you do not wish to receive this information anymore, please unsubscribe from future mailings at https://maillist.psb.ugent.be/mailman/options/seminars . cid:946540515@15122008-0D1CPSBcid: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 Dr Paul Berkman
by Delphine Verspeel 04 Sep '12

04 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 . If you do not wish to receive this information anymore, please unsubscribe from future mailings at https://maillist.psb.ugent.be/mailman/options/seminars . cid:946540515@15122008-0D1CPSBcid: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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