Regeneration strategy of tree species, Thujopsis dolabrata var. hondae living long as shrub-like form

2016 Fiscal Year Final Research Report

• Project/Area Number: 26450213
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Forest science
• Research Institution: Forestry and Forest Products Research Institute
• Principal Investigator: Yagihashi Tsutomu 国立研究開発法人森林総合研究所, 東北支所, グループ長 (00353889)
• Co-Investigator(Renkei-kenkyūsha): Saitoh Tomoyuki 国立研究開発法人森林総合研究所, 東北支所, 主任研究員 (00414483) ; Takata Katsuhiko 秋田県立大学, 木材高度加工研究所, 教授 (50264099) ; Hasegawa Yoichi 国立研究開発法人国際農林水産業研究センター, 林業領域, 研究助手 (30634034)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 伏条 / ヒノキアスナロ / マイクロサテライトマーカー / マルチプレックス EST-SSR / クローン繁殖 / 耐陰性

Outline of Final Research Achievements

Under the low-light condition, Thujopsis dolabrata var. hondae (hiba) could make layering with several branches and each layered branch could stand independent from the non-photosynthetic tissue behind the adventitious root. We assumed that this is a regeneration strategy of increasing the number of ramet, and occupying space horizontally. We set up an experimental plot in place where hiba sustained seedling bank over 80 years under the beech forest canopy. We carried out DNA analyses to identify individual and tree-ring analysis to elucidate the age of several ramets. As a result, it was revealed that hiba increased the number of stems in a shrub-like manner by layering, occupied space horizontally, and there were trunks surviving for 90 years under the beech forest canopy.

Free Research Field

森林生態学