Effects of soil nutrient availability and ozone on container-grown Japanese larch seedlings and role of soil microbes
- PDF / 894,527 Bytes
- 17 Pages / 595.276 x 790.866 pts Page_size
- 84 Downloads / 181 Views
ORIGINAL PAPER
Effects of soil nutrient availability and ozone on container‑grown Japanese larch seedlings and role of soil microbes Evgenios Agathokleous1,2 · Mitsutoshi Kitao2 · Masabumi Komatsu3 · Yutaka Tamai4 · Hideyuki Saito4 · Hisanori Harayama2 · Akira Uemura5 · Hiroyuki Tobita5 · Takayoshi Koike4
Received: 17 April 2019 / Accepted: 1 July 2019 © The Author(s) 2019
Abstract The interactive effects of ozone, soil nutrient availability and root microorganisms on physiological, growth, and productivity traits were studied for the first time for Japanese larch (Larix kaempferi) seedlings grown in containers over a growing season, using a free air ozoneconcentration enrichment exposure system. High nutrient availability altered leaf and root nutrient dynamics and enhanced plant growth; however, it also enhanced seedling susceptibility to damping-off disease compared to low nutrient availability. Negative effects of elevated ozone, as compared with ambient ozone, on leaf gas exchange and plant stem form were neither offset nor exacerbated by soil nutrient availability and root colonizers. Such negative effects suggest that elevated ozone may have implications for ecological health even when plant vigor is limited by factors
other than ozone. Inoculation of roots with ectomycorrhizae had negligible influence on the effects of either soil nutrient availability or ozone. However, this lack of effect may be upon impeded formation of complete mycorrhizal root tips due to factors other than the manipulated variables. B and Na appeared to have an important role in stress responses, so further studies to examine their link with physiological mechanisms as a function of time. This study provides an important perspective for designing forestry practices to enhance seedling health.
Project funding: The Project was fully funded by JSPS KAKENHI Grant Number JP17F17102.
The degraded quality of the atmospheric environment seen over the last decades is in part due to the increases in the levels of ground-level ozone ( O3) (Akimoto 2003; Akimoto et al. 2015; Lefohn et al. 2018; Nair et al. 2018). Local and regional regulations has helped decrease O3 levels in parts of the world (Sicard et al. 2013) and the level of air pollutants that interplay in O3 formation and thus may decrease
The online version is available at http://www.springerlink.com Corresponding editor: Zhu Hong. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11676-019-01056-y) contains supplementary material, which is available to authorized users. * Evgenios Agathokleous [email protected] 1
2
Institute of Ecology, Key Laboratory of Agrometeorology of Jiangsu Province, School of Applied Meteorology, Nanjing University of Information Science and Technology (NUIST), Nanjing 210044, Jiangsu, People’s Republic of China Hokkaido Research Center, Forestry and Forest Products Research Institute (FFPRI), Forest Research and Management Organization, 7 Hitsujigaoka, Sapporo, Hokkaido 062‑8516, Japan
Data Loading...
