2012 Fiscal Year Final Research Report
Elucidation of mechanism of mast seeding: assessment of nitrogen cycle in soil-plant systems in mature Fagus crenata forest
| Project/Area Number |
21380103
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Forest science
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| Research Institution | Forestry and Forest Products Research Institute |
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Principal Investigator |
HAN Qingmin 独立行政法人森林総合研究所, 北海道支所, チーム長 (40391180)
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| Co-Investigator(Kenkyū-buntansha) |
KABEYA Daisuke 森林総研, 植物生態研究領域, 主任研究員 (30353650)
INAGAKI Yoshiyuki 森林総研, 立地環境研究領域, 主任研究員 (00353590)
NARAMOTO Masaaki 静岡大学, 農学部, 助教 (10507635)
CHIBA Yukihiro 森林総研, 企画部, 研究企画課長 (90353771)
FURUSAWA Hitomi 森林総研, 男女共同参画室, 室長 (40353841)
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| Co-Investigator(Renkei-kenkyūsha) |
INAGAKI Yoshiyuki 森林総研, 立地環境研究領域, 主任研究員 (00353590)
KAKUBARI Yoshitaka 静岡大学, 農学部, 教授 (60126026)
IIO Atsuhiro 静岡大学, 農学部, 特任助教 (90422740)
CHRISTIAN Korner バーゼル大学, 植物研究所, 教授
GUNTER Hoch バーゼル大学, 植物研究所, 主任研究員
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| Project Period (FY) |
2009 – 2012
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| Keywords | 至近要因 / 窒素 / 非構造性炭水化物 / 貯蔵資源量 / 年収支 / マスティング |
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| Research Abstract |
In order to elucidate the mechanism of mast seeding, contribution of internal resource storage and current-year gained resource to seed production were assessed in mature Fagus forests. The main findings are (1) seeds are produced from current-year photoassimilates, but independent on internal stored non-structural carbohydrate (NSC), (2) nitrogen (N) in leaves and branchlets served as storage organ for seed production, (3) current-year uptake of N from soil contributed greatly to seed production, (4) although internal storage of both N and NSC decreased after a full mast event, the storage pool was always two-fold higher than its respective values measured from reproductive litters. These results suggest that the level of annual internal resource store may not be the trigger of flowering in mast seeding species.
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