Evaluation of the effect of 137Cs on heavy-metal tolerance of tree seedlings

2017 Fiscal Year Final Research Report

• Project/Area Number: 25292080
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Forest science
• Research Institution: University of Tsukuba
• Principal Investigator: YAMAJI Keiko 筑波大学, 生命環境系, 准教授 (00420076)
• Co-Investigator(Kenkyū-buntansha): 田村 憲司 筑波大学, 生命環境系, 教授 (70211373) ; 升屋 勇人 国立研究開発法人森林研究・整備機構, 森林総合研究所東北支所, チーム長 (70391183)
• Research Collaborator: HOSHI Misaki ; KATO Haruka ; NIKKESHI Aoi ; HARUMA Toshikatsu
• Project Period (FY): 2013-04-01 – 2018-03-31
• Keywords: 放射性 Cs / 重金属 / ストレス耐性 / 内生菌

Outline of Final Research Achievements

Due to the accident at the Fukushima Daiichi nuclear power plant, large amounts of 137Cs have been released into the atmosphere. Generally, root endophytes enhance environmental stress in plants. We evaluated the effect of 137Cs on the symbiosis between C. barvinervis and root endophytes, which enhance heavy-metal tolerance of the plant, analyzing the effect of 137Cs on isolation frequency of endophytes and their chemical characteristics. nMDS analysis showed that the isolation frequency was influenced by 137Cs concentration in soil. In contrast, GLMM analysis clarified that the isolation frequency of each species was not significantly influenced by 137Cs. GLMM analysis also clarified that Zn detoxicants or melanin productions by several endophytes showed significantly positive correlation with 137Cs concentration. We conclude that 137Cs would not remarkably influence symbiosis between C. barbinervis and root endophytes under heavy-metal stress.

Free Research Field

森林・環境生態化学