Differences in monoterpene emission characteristics after ozone exposure between three clones representing major gene pools of Cryptomeria japonica

Takafumi MIYAMA, Hiroyuki TOBITA, Kentaro UCHIYAMA, Kenichi YAZAKI, Saneyoshi UENO, Takami SAITO, Asako MATSUMOTO, Mitsutoshi KITAO, Takeshi IZUTA
2018 Journal of Agricultural Meteorology  
Tropospheric ozone (O 3 ) concentration has been increasing. The aim of this study was to compare the effect of O 3 exposure on monoterpene emission rate and the components of Japanese cedar (Cryptomeria japonica) between three major gene pools identified by population genetic structure analysis. At the O 3 -FACE (Free-Air O 3 and CO 2 Enrichment) facility, 1-year saplings of three clones of Japanese cedar (Donden, Kawazu, and Yakushima) were exposed to ambient double concentrations of O 3 .
more » ... er 15 months of O 3 exposure experiment, monoterpene emission characteristics were evaluated by branch enclosure method using cutting samples of current-year leaves. Basal biogenic volatile organic compound emission rate (E s ) was higher in the O 3 exposure plots, and two-way analysis of variance revealed an effect of the O 3 exposure ( p < 0.05) and an interaction between the O 3 exposure and clone ( p < 0.05). Especially, high E s values were observed in the Yakushima after the O 3 exposure. In addition, the coefficient β related to temperature sensitivity increased in the O 3 exposure plots ( p < 0.05). Our findings supported the fact that there are large inter-clone variations in C. japonica. It is important to evaluate the differences in clones considering the genetic diversity and to clarify the mechanism of the differences after long-term moderate O 3 exposure.
doi:10.2480/agrmet.d-17-00043 fatcat:bdz47g5hhfe2tdrx6fzwhwi5mq