Development of a co-benefit type vegetative treatment system using the Lemnoideae with enhanced frond function

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K00580
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Environmental engineering and reduction of environmental burden
• Research Institution: University of Yamanashi
• Principal Investigator: TANAKA Yasuhiro 山梨大学, 大学院総合研究部, 准教授 (50377587)
• Co-Investigator(Kenkyū-buntansha): 遠山 忠 山梨大学, 大学院総合研究部, 准教授 (60431392) ; 森 一博 山梨大学, 大学院総合研究部, 准教授 (90294040)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: ウキクサ / PGPB / 水質浄化

Outline of Final Research Achievements

We succeeded in isolating two plant growth-promoting bacteria (PGPB; the strains LA-C6 and SP-2-C10) from Lemna minor, a member of Lemnoideae. These PGPB also elevated the growth of microalgae.
Additionally, 27 bacterial strains, which have a gene for phenol hydroxylase involving degradation of phenol and trichloroethylene etc., were isolated from the fronds of Lemnoideae. By inoculating the phenol hydroxylase gene positive strains, 21L25, 22L16, 22L21, 32L3 and 22L7, into aseptic duckweed, we successfully obtained the plant possessing high level of phenol degrading ability. During this process, it was also revealed that the strain 22L7 is a PGPB for L. minor.

Free Research Field

環境微生物学