| Title: | Rethinking how volatiles are released from plant cells |
| Author(s): | Widhalm JR; Jaini R; Morgan JA; Dudareva N; |
| Address: | "Department of Biochemistry, Purdue University, 175 South University St., West Lafayette, IN 47907-2063, USA. School of Chemical Engineering, Purdue University, 480 Stadium Mall Dr., West Lafayette, IN 47907-2100, USA. Department of Biochemistry, Purdue University, 175 South University St., West Lafayette, IN 47907-2063, USA; School of Chemical Engineering, Purdue University, 480 Stadium Mall Dr., West Lafayette, IN 47907-2100, USA. Department of Biochemistry, Purdue University, 175 South University St., West Lafayette, IN 47907-2063, USA; Department of Horticulture and Landscape Architecture, Purdue University, 625 Agriculture Mall Dr., West Lafayette, IN 47907-2010, USA. Electronic address: dudareva@purdue.edu" |
| DOI: | 10.1016/j.tplants.2015.06.009 |
| ISSN/ISBN: | 1878-4372 (Electronic) 1360-1385 (Linking) |
| Abstract: | "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 gas phase. It is presumed that VOC movement through each barrier occurs via passive diffusion. However, VOCs, which are primarily nonpolar compounds, will preferentially partition into membranes, making diffusion into aqueous compartments slow. Using Fick's first law, we calculated that to achieve observed VOC emission rates by diffusion alone would necessitate toxic VOC levels in membranes. Here, we propose that biological mechanisms, such as those involved in trafficking other hydrophobic compounds, must contribute to VOC emission. Such parallel biological pathways would lower barrier resistances and, thus, steady-state emission rates could be maintained with significantly reduced intramembrane VOC concentrations" |
| Keywords: | "Diffusion Models, Biological Plant Cells/*metabolism Plants/*metabolism Volatile Organic Compounds/*metabolism emission phenylpropanoids/benzenoids terpenoids trafficking volatile organic compound (VOC);" |
| Notes: | "MedlineWidhalm, Joshua R Jaini, Rohit Morgan, John A Dudareva, Natalia eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Review England 2015/07/21 Trends Plant Sci. 2015 Sep; 20(9):545-50. doi: 10.1016/j.tplants.2015.06.009. Epub 2015 Jul 16" |
