演講快訊

2022
12.12

Mass transfer of flower volatiles to the atmosphere

Professor John A. Morgan

時間:2022年12月12日 (一) 15:10
主持人:許梅娟 教授
講者:Professor John A. Morgan
服務單位:Davidson School of Chemical Engineering, Purdue University
講題:Mass transfer of flower volatiles to the atmosphere
地點:4樓創意講堂

摘要 :

For plant volatile organic compounds (VOCs) to be emitted, they must cross membrane(s), the aqueous cell wall, and sometimes the cuticle, before moving into the atmosphere. Previously, it was presumed that VOC movement through each barrier occurs via passive diffusion. Using Fick's first law, we calculated that to achieve observed VOC emission rates by diffusion alone would necessitate toxic VOC levels in membranes. Thus, we proposed biological mechanisms, such as those involved in trafficking other hydrophobic compounds, must contribute to VOC emission. I will present work on the identification of an active membrane transporter, facilitated diffusion across the cell wall and how cuticle thickness and composition mediate emission fluxes in Petunia flowers.

學經歷 :

B. S. ChE University of Kansas

Ph.D. ChE Rice University

Postdoc-University of California, Berkeley