2022 Fiscal Year Final Research Report
Does winter freezing affect more on the hydraulic and photosynthetic functions of temperate lianas than trees?
| Project/Area Number |
19K06127
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 40010:Forest science-related
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2023-03-31
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| Keywords | つる植物 / 通導 / 根圧 / 冷温帯 |
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| Outline of Final Research Achievements |
This study aimed to elucidate the hydraulic features, especially their responses to winter freezing, for liana and tree species in a cool-temperate forest. Measurements of the seasonal patterns of sap flux and stem hydraulic conductivity, and the extent of root pressure generated prior to bud break revealed that some species rely only on current-year xylem for water conduction whereas some others restore the hydraulic function of older xylem by means of root pressure in early spring. Both types of hydraulic strategies were found in both lianas and trees and striking differences were not found in responses of stem hydraulics to freezing between both groups.
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| Free Research Field |
植物生態学
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| Academic Significance and Societal Importance of the Research Achievements |
つる植物はその通導構造が凍結に弱いと考えられ，従って温暖化に伴い温帯で勢力を増し，森林の炭素量を低下させるなど深刻な影響を及ぼすことが懸念されている．しかし温帯つる植物の生態については不明な点が多く，温暖化がつる植物群に与える影響を検証するための材料が欠けている．本研究はこの空白を埋めるべく温帯つる植物の基礎的な通導特性，特に冬期の凍結への反応評価を行った．得られた結果は先例のない発見を多く含み，温帯つる植物の生態の理解を深め，その将来的な森林機能への影響を評価することにつながる重要な成果である．
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