文献类型: 外文期刊
作者: Chen, Jian 1 ; Han, Fengxiang X. 4 ; Wang, Fan 1 ; Zhang, Haiqiang 5 ; Shi, Zhiqi 1 ;
作者机构: 1.Jiangsu Acad Agr Sci, Inst Food Safety & Qual, Nanjing 210014, Peoples R China
2.Minist Agr, Key Lab Agrofood Safety & Qual, Nanjing 210014, Peoples R China
3.State Key Lab Breeding Base, Key Lab Food Qual & Safety Jiangsu Prov, Nanjing 210014, Peoples R China
4.Jackson State Univ, Dept Chem & Biochem, Jackson, MS 39217 USA
5.Nanjing Agr Univ, Coll Life Sci, Nanjing 210095, Peoples R China
关键词: MC-LR accumulation;rice grains;rice root;reactive oxygen species;nitric oxide
期刊名称:ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY ( 影响因子:6.291; 五年影响因子:6.393 )
ISSN:
年卷期:
页码:
收录情况: SCI
摘要: Irrigation with eutrophic water containing microcystins-LR (MC-LR) poses a potential risk to crops. However, the accumulation of MC-LR in rice grains and the mechanism of MC-LR-induced inhibition in rice roots are not understood. In this study, we detected the accumulation of MC-LR in rice grains collected from Taihu Lake region. MC-LR could accumulate in rice grains, but the risk evaluation suggested that MC-LR levels in rice grains from Taihu Lake region may not pose a threat to human health currently. In addition, MC-LR with low concentrations did not affect the growth of rice roots. However, MC-LR with high concentrations impeded the rice root morphogenesis by inhibiting root elongation, crown root formation, and lateral root development from primordia. Treatment with high concentrations of MC-LR stimulated the production of reactive oxygen species (ROS) and inhibited the production of nitric oxide (NO) in rice roots. Exogenous NO treatment reversed the inhibition of rice root growth under MC-LR stress. These results indicated that ROS and NO played important roles in the development of rice roots in responding to MC-LR stress.
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