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ID 25949
file
creator
Oguntimehin, Ilemobayo
Nakatani, Nobutake
subject
PAHs fumigation
Fluoranthene
Phenanthrene
Mannitol
Pine needles
NDC
Botany
abstract
Polycyclic aromatic hydrocarbons (PAHs) have been widely studied with respect to their carcinogenic and mutagenic effects on animals and human cells. Phenanthrene (PHE) and fluoranthene (FLU) effects on the needle photosynthetic traits of two-year-old Japanese red pine (Pinus densiflora Sieb. et. Zucc) seedlings were investigated. Three months after fumigation of foliage with solutions containing these PAHs (10 μM each), FLU had negative effects on net photosynthesis at near-saturating irradiance, stomatal conductance, initial chlorophyll fluorescence, and the contents of total chlorophyll, magnesium, and ribulose 1,5-bisphosphate carboxylase (rubisco) of current-year needles. PHE had similar negative effects to FLU but in lesser magnitude. The effects of the PAHs were mitigated by the addition of an OH-radical scavenger (mannitol) into the PAHs solutions. PAHs deposited on the surface of pine needles may induce the generation of reactive oxygen species in the photosynthetic apparatus, a manner closely resembling the action of the herbicide paraquat.

Capsule: Fluoranthene and phenanthrene caused negative effects on the needles of Japanese red pine.
journal title
Environmental Pollution
volume
Volume 154
issue
Issue 2
start page
264
end page
271
date of issued
2008-06
publisher
Elsevier Science Ltd.
issn
0269-7491
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
author
rights
Copyright (c) 2007 Elsevier Ltd
relation url
department
Graduate School of Biosphere Science