Transient interaction effects of temperature and light intensity on isoprene and monoterpene emissions from Schima superba and Phoebe bournei

Fangyuan Ma; Geye Zhang; Hao Guo; Lulu Liao; Xingran Huang; Zhigang Yi

doi:10.1016/j.scitotenv.2023.165082

Transient interaction effects of temperature and light intensity on isoprene and monoterpene emissions from Schima superba and Phoebe bournei

Sci Total Environ. 2023 Oct 10:894:165082. doi: 10.1016/j.scitotenv.2023.165082. Epub 2023 Jun 22.

Authors

Fangyuan Ma¹, Geye Zhang¹, Hao Guo², Lulu Liao¹, Xingran Huang¹, Zhigang Yi³

Affiliations

¹ Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China.
² College of Mechanical and Electrical Engineering, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China.
³ Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China. Electronic address: zgyi@fafu.edu.cn.

PMID: 37355121
DOI: 10.1016/j.scitotenv.2023.165082

Abstract

Biogenic volatile organic compound (BVOC) (such as isoprene (ISO) and monoterpenes (MTs)) emissions from plants play a great role in the atmospheric chemistry. Now frequency of dramatic changes of weather such as transient temperature changing increases, most current studies focus on the effects of simulating climate change (long-term) on BVOC emissions. While studies of transient effects on that are less reported. This study aimed to identify the ISO and MT emissions and the related physiological processes in the short-term scale at different temperature (T) and light intensity (PAR), in seeding stage of Schima superba and Phoebe bournei belonging to typical subtropical tree species. The results showed that the ISO and MT emissions were significantly affected by T and PAR, either independently or interactively. With the increase of T and PAR, the ISO and MT emissions increased, with the maximum rates of ISO and MTs of 39.39 and 1042.35 pmol m^-2 s^-1 for S. superba under 40 °C × 500 μmol m^-2 s^-1 condition, while the maximum rates reached 18.73 and 6737.41 pmol m^-2 s^-1 at 30 °C × 1500 μmol m^-2 s^-1 for P. bournei. The increase of ISO and MT emissions with T and PAR increasing that was related to the promotion of Pn and g_s in plants. Regarding MT components, the proportion of α-pinene decreased with T and PAR increasing, with the lowest ratios of 4.91 % and 21.16 % for S. superba and P. bournei under 40 °C × 1500 μmol m^-2 s^-1 condition. However, the proportion of β-pinene significantly increased, with the highest ratios of 67.42 % and 57.93 % for S. superba and P. bournei under 30 °C × 1500 μmol m^-2 s^-1 condition, which is attributed to differences in light tolerance between the two plants. Our study provides basis for evaluating the transient changes of environmental factors on BVOC emissions and optimizing regional BVOC emission models.

Keywords: Biogenic volatile organic compounds (BVOCs); Isoprene (ISO); Monoterpenes (MTs); Photosynthetically active radiation (PAR); Temperature.

MeSH terms

Hemiterpenes
Monoterpenes*
Plants
Temperature
Trees
Volatile Organic Compounds*

Substances

Monoterpenes
isoprene
Hemiterpenes
Volatile Organic Compounds