Isoprenoid emissions from Schima superba and Cunninghamia lanceolata: Their responses to elevated temperature by two warming facilities

Fangyuan Ma; Geye Zhang; Junchuan Zhang; Xinyue Luo; Lulu Liao; Hao Wang; Xinghao Tang; Zhigang Yi

doi:10.1016/j.scitotenv.2024.172669

Isoprenoid emissions from Schima superba and Cunninghamia lanceolata: Their responses to elevated temperature by two warming facilities

Sci Total Environ. 2024 Apr 26:930:172669. doi: 10.1016/j.scitotenv.2024.172669. Online ahead of print.

Authors

Fangyuan Ma¹, Geye Zhang², Junchuan Zhang², Xinyue Luo², Lulu Liao², Hao Wang³, Xinghao Tang⁴, Zhigang Yi⁵

Affiliations

¹ College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; Institute for Environmental and Climate Research, Jinan University, Guangzhou, Guangdong 511443, China.
² College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China.
³ Institute for Environmental and Climate Research, Jinan University, Guangzhou, Guangdong 511443, China.
⁴ Fujian Academy of Forestry Science, Fuzhou 350012, China.
⁵ College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China. Electronic address: zgyi@fafu.edu.cn.

PMID: 38677435
DOI: 10.1016/j.scitotenv.2024.172669

Abstract

Isoprenoids (including isoprene (ISO) and monoterpenes (MTs)) are the majority of biogenic volatile organic compounds (BVOCs) which are important carbon-containing secondary metabolites biosynthesized by organisms, especially plant in terrestrial ecosystem. Results of the warming effects on isoprenoid emissions vary within species and warming facilities, and thus conclusions remain controversial. In this study, two typical subtropical tree species seedlings of Schima superba and Cunninghamia lanceolata were cultivated under three conditions, namely no warming (CK) and two warming facilities (with infrared radiators (IR) and heating wires (HW)) in open top chamber (OTC), and the isoprenoid emissions were measured with preconcentor-GC-MS system after warming for one, two and four months. The results showed that the isoprenoid emissions from S. superba and C. lanceolata exhibited uniformity in response to two warming facilities. IR and HW both stimulated isoprenoid emissions in two plants after one month of treatment, with increased ratios of 16.3 % and 72.5 % for S. superba, and 2.47 and 5.96 times for C. lanceolata. However, the emissions were suppressed after four months, with more pronounced effect for HW. The variation in isoprenoid emissions was primarily associated with the levels of Pn, Tr, monoterpene synthase (MTPS) activity. C. lanceolata predominantly released MTs (mainly α-pinene, α-terpene, γ-terpene, and limonene), with 39.7 % to 99.6 % of the total isoprenoid but ISO was only a very minor constituent. For S. superba, MTs constituted 24.7 % to 96.1 % of total isoprenoid. It is noteworthy that HW generated a greater disturbance to physiology activity in plants. Our study provided more comprehensive and more convincing support for integrating temperature-elevation experiments of different ecosystems and assessing response and adaptation of forest carbon cycle to global warming.

Keywords: Biogenic volatile organic compounds (BVOCs); Heating wires; Infrared radiators; Isoprenoid; Simulated warming.