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DTSTART;TZID=Europe/Amsterdam:20251120T150000
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DTSTAMP:20260625T190627
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SUMMARY:EPSO Plant Science Seminar “Understanding the impact of plant insect interactions”
DESCRIPTION:EPSO Plant Science Seminar “Understanding the impact of plant insect interactions”\nRegister for the 47th EPSO Plant Science Seminar – the 20th November 2025 seminar will focus on the “Understanding the impact of plant insect interactions” \n\nAssoc Prof. Petra Bleeker\, Univ of Amsterdam\, NL\nDr Jorunn Bos\, Hutton Institute\, UK\nDr. Elena Valdés Correcher\, CSIC\, ES\n\nEPSO members register in advance for this meeting: \nhttps://us06web.zoom.us/meeting/register/aTkdytQdQUmKuAXPShbuGA \nto receive the meeting link
URL:https://graduateschool-eps.info/event/epso-plant-science-seminar-understanding-the-impact-of-plant-insect-interactions/
LOCATION:Online
CATEGORIES:Seminars
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DTEND;TZID=Europe/Amsterdam:20251125T160000
DTSTAMP:20260625T190627
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SUMMARY:GLS seminar Rebecca Mosher - RNA-directed DNA Methylation: a maternal influence during seed development
DESCRIPTION:GLS seminar by Rebecca Mosher – RNA directed DNA Methylation: a maternal influence during seed development\nSpeaker: Rebecca Mosher (Becky Mosher) University of Oxford\, Oxford\, UK \nDate: Tuesday 25 November 2025 \nTime: 15:00 -16:00 \nLocation UvA Science Park 904\, Room C0.05 \nHost: Maike Stam \n*followed by a meet up with the speaker for GLS master students\, PhD candidates\, and postdocs of the plant groups (hosted by Juliette Aubert) \n24-nt small interfering (si)RNAs establish DNA methylation at thousands of genomic loci in a process called RNA-directed DNA Methylation (RdDM). RdDM is dispensable for growth and development in Arabidopsis\, but is required for reproduction in many other plant species\, particularly historically outbreeding species. In Brassica rapa\, the embryo and endosperm abort if RdDM is disrupted in the maternal sporophyte\, implying communication between maternal and filial tissues. During reproduction\, 24-nt siRNAs are particularly abundant in maternal sporophytic tissue such as the seed coat\, largely due to overwhelming expression from a small number of “siren” loci. Siren loci account for over 90% of siRNAs in ovules and early seeds\, and many siRNAs are produced from gene fragments embedded in these loci. We recently demonstrated that these siRNAs trigger methylation at homologous protein-coding genes\, and in some cases this trans-methylation impacts expression of the target gene. In the endosperm\, siren siRNAs are maternally biased\, suggesting that siRNAs might be transported to\, and function in\, filial tissues. Together\, these observations suggest that maternally-derived siren siRNAs might methylate protein-coding genes in filial tissues to influence seed development. \n  \nTwo papers linked to the seminar: \n\nGrover JW et al\, PNAS 2020\nBurgess D et al\, Plant Cell 2022
URL:https://graduateschool-eps.info/event/rebecca-mosher-rna-directed-dna-methylation-a-maternal-influence-during-seed-development/
CATEGORIES:Seminars
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