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学术报告 2021年05月06日(星期四)下午15:00 报告人:Prof. Jiří Friml
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学术报告 2021年05月06日(星期四)下午15:00 报告人:Prof. Jiří Friml

题 目: Auxin canalization in self-organizing plant development
报告人: Prof. Jiří Friml,
Institute of Science and Technology Austria, Austria.
时 间: 2021年05月06日  下午15:00
地 点: 中国农业大学  生命科学研究中心  一层报告厅(线上直播)

腾讯会议直播:
https://meeting.tencent.com/l/sxSHfbVFJvew



摘要:The plant hormone auxin is a versatile intercellular signal influencing virtually all aspects of plant life. It has a unique ability to be directionally transported within tissues forming local auxin maxima or gradients that are central to many developmental processes mediated by auxin. The key components of this polar auxin flow are plant-specific, auxin exporters from the PIN family showing typically polar, subcellular localization at the plasma membrane. PINs have been shown to mediate auxin export from cells in many homologous and heterologous systems but their structure and mechanism of their action are still unknown. The important but mechanistically not well-understood property of PIN-dependent polar auxin transport is its ability to self-organize and form polarized auxin-transporting channels. This, so called, auxin canalization mechanism provides a positional cue for formation of vasculature during organogenesis, leaf venation or regeneration around the wound.

Recently we have provided new molecular insights into the feedback mechanisms between auxin signaling and PIN polarity - a crucial component of canalization. We identified CAMEL/CANAR receptor-like kinase complex that is required for auxin-mediated PIN repolarization. Here we will also present how this signaling system cooperatively with different auxin signaling pathways regulate PIN-dependent auxin transport contributing to the self-organizing nature of plant development.

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