Mechanisms of tree decline and death after intensive thinning in Chamaecyparis obtusa: Responses to environmental changes which include changes of wind environment.

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K14753
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Forest science
• Research Institution: Shizuoka University
• Principal Investigator: naramoto masaaki 静岡大学, 農学部, 准教授 (10507635)
• Co-Investigator(Kenkyū-buntansha): 片畑 伸一郎 岐阜大学, 応用生物科学部, 助教 (80648395)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 風環境 / 遺伝子発現 / 生理応答 / キャビテーション

Outline of Final Research Achievements

Physiological and growth responses under wind and drought treatments were measured for saplings of Chamaecyparis obtusa. And transcriptome which may relate to some stress after these treatments were collected by using RNA-sequencing. Although the frequency of cavitation increased, photosynthetic rate and stomatal conductance didn’t change under wind treatment. Saplings of wind treatment had prevailing laterally extension growth, though there were no significant differences. There were differences in the amount of gene expression level between control and treated trees. For example, expression level of 2572 genes increased in saplings under wind and drought treatment. The frequency of cavitation increased under natural windy conditions, too for a mature tree of Chamaecyparis obtusa. The effects of not only the increases in sap flow but stem shaking on cavitation occurrence were suggested by SEM analysis.

Free Research Field

森林科学