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タイトル: Initial hydraulic failure followed by late-stage carbon starvation leads to drought-induced death in the tree Trema orientalis
著者: Kono, Yuri
Ishida, Atsushi
Saiki, Shin-Taro
Yoshimura, Kenichi
Dannoura, Masako
Yazaki, Kenichi
Kimura, Fuku
Yoshimura, Jin
Aikawa, Shin-ichi
著者名の別形: 甲野, 裕理
石田, 厚
才木, 真太朗
吉村, 謙一
檀浦, 正子
矢崎, 健一
木村, 芙久
吉村, 仁
相川, 真一
キーワード: Ecophysiology
Forest ecology
Plant sciences
発行日: 7-Jan-2019
出版者: Springer Nature
誌名: Communications Biology
巻: 2
論文番号: 8
抄録: Drought-induced tree death has become a serious problem in global forest ecosystems. Two nonexclusive hypotheses, hydraulic failure and carbon starvation, have been proposed to explain tree die-offs. To clarify the mechanisms, we investigated the physiological processes of drought-induced tree death in saplings with contrasting Huber values (sapwood area/total leaf area). First, hydraulic failure and reduced respiration were found in the initial process of tree decline, and in the last stage carbon starvation led to tree death. The carbohydrate reserves at the stem bases, low in healthy trees, accumulated at the beginning of the declining process due to phloem transport failure, and then decreased just before dying. The concentrations of non-structural carbohydrates at the stem bases are a good indicator of tree damage. The physiological processes and carbon sink-source dynamics that occur during lethal drought provide important insights into the adaptive measures underlying forest die-offs under global warming conditions.
記述: 乾燥を受けた樹木が枯死に至る生理過程を解明 --地球温暖化の森林への影響を高精度に予測する道を開く成果--. 京都大学プレスリリース. 2019-01-28.
著作権等: © The Author(s) 2019. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
URI: http://hdl.handle.net/2433/235961
DOI(出版社版): 10.1038/s42003-018-0256-7
PubMed ID: 30623104
関連リンク: http://www.kyoto-u.ac.jp/ja/research/research_results/2018/190107_1.html
出現コレクション:学術雑誌掲載論文等

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