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MSc Exit Seminar – Daniel Johnson (Goring Lab)

July 13, 2016 @ 1:10 pm - 1:40 pm

MSc Exit Seminar


Wednesday July 13th, 1:10 pm – Earth Sciences Centre, Rm. 3087


Daniel Johnson (Goring lab)


 “Trafficking Dynamics in Arabidopsis Pollen-Stigma Interactions”



Reproduction in the Brassicaceae family depends on self-recognition, where cross-compatible pollen is distinguished from self-incompatible pollen prior to acceptance by the stigma. The stigma only gives compatible pollen the resources required for hydration and germination of a pollen tube for fertilization. These resources are sequestered away from self-incompatible pollen, inhibiting inbreeding. Many questions remain surrounding the specific signalling events that govern this self-recognition system. This research investigates how resource delivery to self-incompatible pollen is prevented in Arabidopsis. Topics explored include the localization of Sec5a, an exocyst complex member that delivers secretory vesicles to compatible pollen; the localization of ARC1, an E3 ubiquitin ligase which prevents the exocyst from delivering resources; and autophagy’s degradation of the sequestered resources.


July 13, 2016
1:10 pm - 1:40 pm
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