The effect of environmental factors on pine wilt disease resistance in Pinus thunbergii

2014 Fiscal Year Final Research Report

• Project/Area Number: 24780161
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Forest science
• Research Institution: Forestry and Forest Products Research Institute
• Principal Investigator: MATSUNAGA Koji 独立行政法人森林総合研究所, 九州育種場, 主任研究員 (40415039)
• Research Collaborator: CHIGIRA Osamu 独立行政法人森林総合研究所, 林木育種センター九州育種場, 育種研究室長
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: クロマツ / マツ材線虫病 / 抵抗性 / 環境要因 / 光強度 / 気温

Outline of Final Research Achievements

To clarify the effect of environmental factors on resistance performance of Pinus thunbergii, I conducted several inoculations with Bursaphelenchus xylophilus to P. thubergii seedlings that have various level of genetically resistance. Inoculation test under different light intensities showed that 1) seedling mortality were affected by light intensity and pine family but not associated with their interaction, 2) reduction of resistance performance induced by relatively slight deterioration of light condition, 3) host plant physiology states acclimatized to light condition were also affected to resistance performance. In addition, I performed a similar inoculation experiment under a different condition of the temperature. Almost all seedlings were dead under high temperature condition irrespective of their genetic background. This result suggested that resistance performance of resistance families were dependent on temperature environment.

Free Research Field

林木育種