Skip to main content
eScholarship
Open Access Publications from the University of California

Atmospheric benzenoid emissions from plants rival those from fossil fuels.

  • Author(s): Misztal, PK
  • Hewitt, CN
  • Wildt, J
  • Blande, JD
  • Eller, ASD
  • Fares, S
  • Gentner, DR
  • Gilman, JB
  • Graus, M
  • Greenberg, J
  • Guenther, AB
  • Hansel, A
  • Harley, P
  • Huang, M
  • Jardine, K
  • Karl, T
  • Kaser, L
  • Keutsch, FN
  • Kiendler-Scharr, A
  • Kleist, E
  • Lerner, BM
  • Li, T
  • Mak, J
  • Nölscher, AC
  • Schnitzhofer, R
  • Sinha, V
  • Thornton, B
  • Warneke, C
  • Wegener, F
  • Werner, C
  • Williams, J
  • Worton, DR
  • Yassaa, N
  • Goldstein, AH
  • et al.

Published Web Location

https://doi.org/10.1038/srep12064Creative Commons 'BY' version 4.0 license
Abstract

Despite the known biochemical production of a range of aromatic compounds by plants and the presence of benzenoids in floral scents, the emissions of only a few benzenoid compounds have been reported from the biosphere to the atmosphere. Here, using evidence from measurements at aircraft, ecosystem, tree, branch and leaf scales, with complementary isotopic labeling experiments, we show that vegetation (leaves, flowers, and phytoplankton) emits a wide variety of benzenoid compounds to the atmosphere at substantial rates. Controlled environment experiments show that plants are able to alter their metabolism to produce and release many benzenoids under stress conditions. The functions of these compounds remain unclear but may be related to chemical communication and protection against stress. We estimate the total global secondary organic aerosol potential from biogenic benzenoids to be similar to that from anthropogenic benzenoids (~10 Tg y(-1)), pointing to the importance of these natural emissions in atmospheric physics and chemistry.

Many UC-authored scholarly publications are freely available on this site because of the UC's open access policies. Let us know how this access is important for you.

Main Content
Current View