2017 Fiscal Year Final Research Report
Analysis of BVOV emission of white birch and grazing traits by insect herbivore under elevated ozone
| Project/Area Number |
16K14932
|
|---|
| Research Category |
Grant-in-Aid for Challenging Exploratory Research
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Forest science
|
|---|
| Research Institution | Hokkaido University |
|---|
Principal Investigator |
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
佐藤 冬樹 北海道大学, 北方生物圏フィールド科学センター, 教授 (20187230)
宮崎 雄三 北海道大学, 低温科学研究所, 助教 (60376655)
中村 誠宏 北海道大学, 北方生物圏フィールド科学センター, 准教授 (80545624)
|
|---|
| Project Period (FY) |
2016-04-01 – 2018-03-31
|
| Keywords | 生物起源揮発性炭素化合物 / 対流圏オゾン / 被食防衛物質 / 食害耐性 / 狹食者 / BVOCブレンド比 / BVOC滞在時間 / 紫外線 |
|---|
| Outline of Final Research Achievements |
Ground-level Ozone (O3) decreased defense leaf capacity because of suppression of photosynthesis. We found severe grazing damages of leaf beetle on a crown of White birch at elevated O3. Contrary to this, choice and non-choice style of feeding experiments showed that leaves exposed to elevated O3 were preferred by leaf beetles because of lower defensive chemicals production. To clarify this phenomenon, we suggested possibility of BVOC (Biogenic Volatile Organic Compounds) as signal chemicals for insects to locate their host plants. BVOCs were roughly sorted into two groups: one was monoterpene (MT), the other was sesquiterpene (SQT). MT and SQT had no significant difference in the basic-emission rate regardless of O3 exposure. Therefore, BVOC emission in itself did not work as a factor of changing grazing activity of leaf beetles although the brand ratio of BVOC should be considered. At high O3, we should study BVOC dynamics through reaction with O3 after emitted in the atmosphere.
|
| Free Research Field |
森林生理生態学
|
