Novel concept of 'gravitational reaction wood' and 'stress reaction wood'

2015 Fiscal Year Final Research Report

• Project/Area Number: 26660140
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Wood science
• Research Institution: Nagoya University
• Principal Investigator: YOSHIDA Masato 名古屋大学, 生命農学研究科, 准教授 (30242845)
• Research Collaborator: YAYAMOTO Hiroyuki 名古屋大学, 大学院生命農学研究科, 教授 (50210555) ; MATSUO Miyuki 名古屋大学, 大学院生命農学研究科, 助教 (70631597) ; SATO Saori 名古屋大学, 大学院生命農学研究科, 特任助教 (60641058) ; KATSURAHARA Hiroki ; KOSUGI Shinnosuke
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: あて材形成

Outline of Final Research Achievements

Reaction wood is formed in leaning stems as a response to 'gravity' and 'stress'. How does each stimulus act on the generation of reaction wood? We investigated the cells formed under only 'stress'-loaded condition in vertical stems.
In Sugi, gymnosperm, compressive stresses made radial diameter of cells decrease; and cell wall thickness large. Similar changes were obtained in tensile-stress condition.
In Buna, angiosperm, compressive stresses made cell wall thickness large; S3 layer disappeared; lignin less; and amount of vessel decrease. Tensile stress made G-layer and decrease of vessel number.

Free Research Field

木質科学