Combined effects of ozone and drought stress on the emission of biogenic volatile organic compounds from <i>Quercus robur</i> L. Journal Article uri icon

Overview

abstract

  • Abstract. Drought events are expected to become more frequent with; climate change. To predict the effect of plant emissions on air quality and; potential feedback effects on climate, the study of biogenic volatile; organic compound emissions under stress is of great importance. Trees can; often be subject to a combination of abiotic stresses, for example due to; drought or ozone. Even though there is a large body of knowledge on; individual stress factors, the effects of combined stressors are not much; explored. This study aimed to investigate changes of biogenic volatile; organic compound emissions and physiological parameters in Quercus robur L. during moderate; to severe drought in combination with ozone stress. Results show that; isoprene emissions decreased while monoterpene and sesquiterpene emissions; increased during the progression of drought. We exposed plants with daily; ozone concentrations of 100 ppb for 1 h for 7 d, which resulted; in faster stomatal closure (e.g., a mean value of −31.3 % at an average stem; water potential of −1 MPa), partially mitigating drought stress effects.; Evidence of this was found in enhanced green leaf volatiles in trees without; ozone fumigation, indicating cellular damage. In addition we observed an; enhancement in (C8H8O3)H+ emissions likely corresponding; to methyl-salicylate in trees with ozone treatment. Individual plant stress; factors are not necessarily additive, and atmospheric models should implement; stress feedback loops to study regional-scale effects.;

publication date

  • January 22, 2021

Date in CU Experts

  • October 5, 2021 12:58 PM

Full Author List

  • Peron A; Kaser L; Fitzky AC; Graus M; Halbwirth H; Greiner J; Wohlfahrt G; Rewald B; Sandén H; Karl T

author count

  • 10

Other Profiles

Electronic International Standard Serial Number (EISSN)

  • 1726-4189

Additional Document Info

start page

  • 535

end page

  • 556

volume

  • 18

issue

  • 2