Effect of arbuscular mycorrhizal fungus (Glomus caledonium) on the accumulation and metabolism of atrazine in maize (Zea mays L.) and atrazine dissipation in soil.
Effects of an arbuscular mycorrhizal (AM) fungus (Glomus caledonium) on accumulation and metabolism of atrazine in maize grown in soil contaminated with different concentrations of atrazine were investigated in a series of pot experiments. Roots of mycorrhizal plants accumulated more atrazine than non-mycorrhizal roots. In contrast, atrazine accumulation in shoot decreased in mycorrhizal compared with non-mycorrhizal plants. No atrazine derivatives were detected in the soil, either with or without mycorrhizal colonization. However, atrazine metabolites, deethylatrazine (DEA) and deisopropylatrazine (DIA), were detected in plant roots and the AM colonization enhanced the metabolism. After plant harvest atrazine concentrations decreased markedly in the soils compared to the initial concentrations. The decreases were the most in rhizosphere soil and then near-rhizosphere soil and the least in bulk soil. Mycorrhizal treatment enhanced atrazine dissipation in the near-rhizosphere and bulk soils irrespective of atrazine application rates.
Huang
Honglin
H
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, 18th Shuangqinglu, Haidian District, Beijing 100085, China.
Zhang
Shuzhen
S
Shan
Xiao-quan
XQ
Chen
Bao-Dong
BD
Zhu
Yong-Guan
YG
Bell
J Nigel B
JN
D001280:Atrazine / Q000031:analogs & derivatives / Q000032:analysis / Q000378:metabolism / Q000493:pharmacokinetics*; D018533:Biomass; D006540:Herbicides / Q000032:analysis*; D038821:Mycorrhizae / Q000378:metabolism*; D018517:Plant Roots / Q000378:metabolism; D018520:Plant Shoots / Q000378:metabolism; D012987:Soil / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis; D014227:Triazines / Q000032:analysis; D003313:Zea mays / Q000378:metabolism*
C445502:6-chloro-N-ethyl-1,3-5-triazine-2,4-diamine; D006540:Herbicides; D012987:Soil; D012989:Soil Pollutants; D014227:Triazines; C446541:deethylatrazine; D001280:Atrazine