| Title: | Leaf defense capacity of Japanese elm (Ulmus davidiana var. japonica) seedlings subjected to a nitrogen loading and insect herbivore dynamics in a free air ozone-enriched environment |
| Author(s): | Sugai T; Okamoto S; Agathokleous E; Masui N; Satoh F; Koike T; |
| Address: | "Silviculture and Forest Ecological Studies, Hokkaido University, Sapporo, 060-8589, Japan. Plant Nutrient Ecology Laboratory, Hokkaido University, Sapporo, 060-8589, Japan. Graduate School of Agriculture, Kyoto University, Kyoto, 606-8502, Japan. Institute of Ecology, School of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing, 210044, China. Field Science Center for Northern Biosphere, Hokkaido University, Sapporo, 060-0809, Japan. Silviculture and Forest Ecological Studies, Hokkaido University, Sapporo, 060-8589, Japan. tkoike@for.agr.hokudai.ac.jp" |
| Journal Title: | Environ Sci Pollut Res Int |
| DOI: | 10.1007/s11356-019-06918-w |
| ISSN/ISBN: | 1614-7499 (Electronic) 0944-1344 (Linking) |
| Abstract: | "Japanese elm (Ulmus davidiana var. japonica) is a native species in cool-temperate forests in Japan. We investigated growth, physiological reactions, and leaf defense capacity of Japanese elm seedlings under nitrogen (N) loading (45.3 kg N ha(-1) year(-1)) and seasonal insect dynamics in a free-air ozone (O(3))-enriched environment (about 54.5 nmol O(3) mol(-1)) over a growing season. Higher leaf N content and lower condensed tannin content in the presence of N loading and lower condensed tannin content in elevated O(3) were observed, suggesting that both N loading and elevated O(3) decreased the leaf defense capacity and that N loading further enhanced the leaf quality as food resource of insect herbivores. Two major herbivores were observed on the plants, elm leaf beetle (Pyrrhalta maculicollis) and elm sawfly (Arge captiva). The peak number of observed insects was decreased by N loading. Visible foliar injury caused by N loading might directly induce the reduction of number of the observed elm sawfly individuals. While elevated O(3) slightly suppressed the chemical defense capacity, significantly lower number of elm leaf beetle was observed in elevated O(3). We conclude that N loading and elevated O(3) can alter not only the leaf defense capacity of Japanese elm seedlings but also the dynamics of elm leaf beetle and sawfly herbivores" |
| Keywords: | "Adaptation, Physiological Animals Herbivory Insecta Japan Nitrogen *Ozone Plant Leaves/*physiology Seedlings Ulmus/*physiology Elevated ozone Insect dynamics Japanese elm Nitrogen deposition Phenolics Tannins;" |
| Notes: | "MedlineSugai, Tetsuto Okamoto, Shota Agathokleous, Evgenios Masui, Noboru Satoh, Fuyuki Koike, Takayoshi eng Germany 2019/12/18 Environ Sci Pollut Res Int. 2020 Jan; 27(3):3350-3360. doi: 10.1007/s11356-019-06918-w. Epub 2019 Dec 16" |
