Water relations of Pinus pumila in the melting season at the alpine region of Mt. Tateyama.

• MARUTA E.

  Faculty of Science, Toho University

• NAKANO Takashi

  Faculty of Science, Tokyo Metropolitan University

• ISHIDA Atsushi

  Forestry and Forest Products Research Institute

• IIDA Hajime

  Yoshida Scientific Museum

• MASUZAWA Takehiro

  Faculty of Science, Shizuoka University

抄録

During the snow melting season of 1994, some exposed needles of Pinus pumila turned yellow in the alpine zone (2450 m) on Mt. Tateyama. However, relative water content (RWC) of the needles was far over the lethal RWC. Temperatures of soil and stems below snowpack remained near 0℃ during midday on 7 May, whereas those of needles and shoots over snowpack increased to 15℃ under high solar radiation. This result shows that transpired water from needles may be sufficiently replenished with water stored in sapwood of stems in the spring. It is concluded that desiccation is an unlikely cause of needle die-back. The most likely alternative explanation appears to be freezing damage, because freezing tolerance of most plants rapidly decreases in spring when minimum air temperature is often below zero in night at high altitude.

収録刊行物

• Proceedings of the NIPR Symposium on Polar Biology

  Proceedings of the NIPR Symposium on Polar Biology (9), 335-342, 1996

  国立極地研究所

詳細情報

• CRID: 1572543026736037632
• NII論文ID: 110001026287
• NII書誌ID: AA10819561
• ISSN: 0914563X
• 本文言語コード: en
• データソース種別:
  • CiNii Articles