Bidirectional exchange of biogenic volatiles with vegetation: emission sources, reactions, breakdown and deposition
Identifieur interne : 000B79 ( Main/Exploration ); précédent : 000B78; suivant : 000B80Bidirectional exchange of biogenic volatiles with vegetation: emission sources, reactions, breakdown and deposition
Auteurs : Ülo Niinemets [Estonie] ; Silvano Fares [Italie] ; Peter Harley [Estonie] ; Kolby J. Jardine [États-Unis]Source :
- Plant, cell & environment [ 0140-7791 ] ; 2014.
Abstract
Biogenic volatile organic compound (BVOC) emissions are widely modeled as inputs to atmospheric chemistry simulations. However, BVOC may interact with cellular structures and neighboring leaves in a complex manner during volatile diffusion from the sites of release to leaf boundary layer and during turbulent transport to the atmospheric boundary layer. Furthermore, recent observations demonstrate that the BVOC emissions are bidirectional, and uptake and deposition of BVOC and their oxidation products are the rule rather than the exception. This review summarizes current knowledge of within-leaf reactions of synthesized volatiles with reactive oxygen species (ROS), uptake, deposition and storage of volatiles and their oxidation products as driven by adsorption on leaf surface and solubilization and enzymatic detoxification inside leaves. The available evidence indicates that due to reactions with ROS and enzymatic metabolism, the BVOC gross production rates are much larger than previously thought. The degree to which volatiles react within leaves and can be potentially taken up by vegetation depends on compound reactivity, physicochemical characteristics, as well as their participation in leaf metabolism. We argue that future models should be based on the concept of bidirectional BVOC exchange and consider modification of BVOC sink/source strengths by within-leaf metabolism and storage.
Url:
DOI: 10.1111/pce.12322
PubMed: 24635661
PubMed Central: 4289707
Affiliations:
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