2013 Fiscal Year Final Research Report

Development of evaluation method for water stress in coastal Japanese black pine.

Research Project

Project/Area Number	23580215
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Research Field	Forest science
Research Institution	Hokkaido Research Organization
Principal Investigator	MASAKA Kazuhiko 地方独立行政法人北海道立総合研究機構, 森林研究本部林業試験場, 主査 (60414273)
Project Period (FY)	2011 – 2013
Keywords	クロマツ / 水ストレス / 衰退 / 生理生態 / 針葉
Research Abstract	We compared leaf transpiration rate, leaf nitrogen contents and leaf delta 13C of Pinus thunbergii saplings among flooding, drought and control treatment to evaluate the tolerance to strong water stress. Leaf delta 13C of drought treatment was singficantly higher than that of control. It implies that stamata tended to be closed not to lose water from needles. On the other hand, leaf transpiration rate of flooding treatment was significantly higher than that of control, and no significant difference was observed in leaf delta 13C. Besides, many saplings died in flooding treatment. Saplings in flooding treatment declined by loss of water due to open stamata, although the saplings sufferred strong water stress.