The comprehensive observation of water use in xylem with transplants in woody species

• Project/Area Number: 16K18713
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Forest science
• Research Institution: Hokkaido University
• Principal Investigator: Umebayashi Toshihiro 北海道大学, 農学研究院, 博士研究員 (20585997)
• Research Collaborator: SANO Yuzou ; UTSUMI Yasuhiro ; KUSUMOTO Dai ; FUKUDA Kenji
• Project Period (FY): 2016-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
• Keywords: 水分生理 / 根切り / 枯死 / 脆弱性曲線 / 通水阻害 / 植栽 / 針葉樹 / 広葉樹 / 根系切断 / 水ストレス / 林学 / 生理学 / 生態学 / 植物 / 環境

Outline of Final Research Achievements

This study was conducted to reveal the relationship between the loss of hydraulic conductivity in xylem after transplants and the mortality ratio among species. The vulnerability curve was drawn to explain the relationship between water stress and the loss of hydraulic conductivity among species. Dead saplings with increasing the amount of pruned roots were detected in ring-porous species forming long vessels and in species that was more vulnerable to water-stress-induced embolisms, and the conductivity in these species significantly decreased with the treatment of root pruning. On the other hand, in Japanese cedar of high resistance to water-stress-induced embolisms, the loss of hydraulic conductivity was induced regardless the amount of pruned roots. This result suggests that the water in xylem may be used to form the new roots after transplants.

Research Products

• [Journal Article] In situ observation of pinewood nematode in wood (2017)
  • Author(s): Umebayashi, T., Yamada, T., Fukuhara, K., Endo, R., Kusumoto, D., Fukuda, K.
  • Journal Title: European Journal of Plant Pathology Volume: 147 Issue: 2 Pages: 463-467
  • DOI: 10.1007/s10658-016-1013-8
  • Peer Reviewed
• [Journal Article] patial distribution of xylem embolisms in the stems of Pinus thunbergii at the threshold of fatal drought stress (2016)
  • Author(s): Umebayashi, T., Morita, T., Utsumi, Y., Kusumoto, D., Yasuda, Y., Haishi, T., Fukuda, K.
  • Journal Title: Tree Physiology Volume: 36 Issue: 10 Pages: 1210-1218
  • DOI: 10.1093/treephys/tpw050
  • Peer Reviewed
• [Journal Article] Differences in drought- and freeze-induced embolisms in deciduous ring-porous plant species in Japan (2016)
  • Author(s): Umebayashi, T., Utsumi, Y., Koga, S., Murata, I., Fukuda, K.
  • Journal Title: Planta Volume: 244 Issue: 3 Pages: 753-760
  • DOI: 10.1007/s00425-016-2564-9
  • Peer Reviewed
• [Journal Article] Observations on the embolism and survival of Pinus thunbergii seedlings inoculated with Bursaphelenchus xylophilus (2016)
  • Author(s): Umebayashi T, Yamada T, Fukuhara K, Endo R
  • Journal Title: European Journal of Plant Pathology Volume: 145 Issue: 1 Pages: 227-231
  • DOI: 10.1007/s10658-015-0829-y
  • Peer Reviewed
• [Journal Article] Freezing xylem conduits with liquid nitrogen creates artifactual embolisms in water-stressed broadleaf trees (2015)
  • Author(s): Toshihiro Umebayashi, Mayumi Y. Ogasa, Naoko H. Miki, Yasuhiro Utsumi, Tomoyuki Haishi & Kenji Fukuda
  • Journal Title: Trees Volume: 30 Issue: 1 Pages: 305-316
  • DOI: 10.1007/s00468-015-1302-4
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] 針葉樹2種の苗木において根切りと水ストレスが通水に及ぼす影響 (2018)
  • Author(s): 梅林利弘・福田健二・内海泰弘・楠本大・佐野雄三
  • Organizer: 日本森林学会
• [Presentation] 苗木の根系切断による水輸送効率低下の種間差 (2017)
  • Author(s): 梅林利弘・内海泰弘・佐野雄三
  • Organizer: 日本森林学会
  • Place of Presentation: 鹿児島大学（鹿児島県・鹿児島市）
  • Year and Date: 2017-03-26
• [Presentation] The interspecific difference in drought stress tolerance with transplants between two woody species (2017)
  • Author(s): Umebayashi, T., Utsumi, Y., Sano, Y.
  • Organizer: Botanical Society of America
  • Int'l Joint Research