[Responses of Arabidopsis thaliana to oxidative stress induced by polycyclic aromatic hydrocarbon fluoranthene].
With the seedlings of model plant Arabidopsis thaliana and the polycyclic aromatic hydrocarbon fluoranthene as test materials, this paper studied the physiological responses of plants to polycyclic aromatic hydrocarbons from the aspects of antioxidases and membrane protection system that are tightly related to abiotic stresses. The results showed that under fluoranthene stress, the seedlings experienced oxidative stress and membrane-lipid peroxidization. At 0.75 mmol x L(-1) of fluoranthene, the photosynthetic process was inhibited; at 1.00 mmol x L(-1) of fluoranthene, the malonaldehydic acid (MDA) content increased and the ascorbate peroxidase (APX) activity decreased significantly, indicating an accelerated membrane-lipid peroxidization; and at 1.25 mmol x L(-1) of fluoranthene, the peroxidase (POD) activity decreased significantly and H2O2 had a high accumulation, making the seedlings injured severely.
Liu
Hong
H
College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China. fjauliuhong@163.com
Ye
Yuan-Bei
YB
Cui
Bo
B
Zheng
Li-Min
LM
Huang
Yan-He
YH
Wang
Zong-Hua
ZH
D017360:Arabidopsis / Q000187:drug effects* / Q000502:physiology; D004784:Environmental Monitoring / Q000379:methods; D005449:Fluorenes / Q000633:toxicity*; D015227:Lipid Peroxidation / Q000187:drug effects; D008315:Malondialdehyde / Q000378:metabolism; D018384:Oxidative Stress / Q000187:drug effects*; D010788:Photosynthesis / Q000187:drug effects; D012989:Soil Pollutants / Q000633:toxicity*
D005449:Fluorenes; D012989:Soil Pollutants; C007738:fluoranthene; D008315:Malondialdehyde