Interactive effects of cadmium and Microcystis aeruginosa (cyanobacterium) on the growth, antioxidative responses and accumulation of cadmium and microcystins in rice seedlings.
Cadmium pollution and harmful cyanobacterial blooms are two prominent environmental problems. The interactive effects of cadmium(II) and harmful cyanobacteria on rice seedlings remain unknown. In order to elucidate this issue, the interactive effects of cadmium(II) and Microcystis aeruginosa FACHB905 on the growth and antioxidant responses of rice seedling were investigated in this study, as well as the accumulation of cadmium(II) and microcystins. The results showed that the growth of rice seedlings was inhibited by cadmium(II) stress but promoted by inoculation of M. aeruginosa FACHB905. cadmium(II) stress induced oxidative damage on rice seedlings. Inoculation of M. aeruginosa FACHB905 alleviated the toxicity of cadmium(II) on rice seedlings. The accumulation of cadmium(II) in rice seedlings was decreased by M. aeruginosa FACHB905, but the translocation of cadmium(II) from root to shoot was increased by this cyanobacterium. The accumulation of microcystins in rice seedlings was decreased by cadmium(II). Results presented in this study indicated that cadmium(II) and M. aeruginosa had antagonistic toxicity on rice seedlings. The findings of this study throw new light on evaluation of ecological- and public health-risks for the co-contamination of cadmium(II) and harmful cyanobacteria.
Collaborative Innovation Center of Grain and Oil Crops in South China, Hunan Agricultural University, Changsha, 410128, P. R. China.|College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, P. R. China.
Xiaolin
X
Kuang
College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, P. R. China.|School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, P. R. China.
Ji-Dong
JD
Gu
College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, P. R. China.
BaiQing
B
Tie
Collaborative Innovation Center of Grain and Oil Crops in South China, Hunan Agricultural University, Changsha, 410128, P. R. China.
Bangsong
B
Yao
Collaborative Innovation Center of Grain and Oil Crops in South China, Hunan Agricultural University, Changsha, 410128, P. R. China. shao@hunau.net.|College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, P. R. China. shao@hunau.net.
Jihai
J
Shao
D002104:Cadmium / Q000378:metabolism / Q000633:toxicity*; D052998:Microcystins / Q000378:metabolism*; D046931:Microcystis / Q000502:physiology*; D012275:Oryza / Q000187:drug effects / Q000502:physiology*; D036226:Seedlings / Q000187:drug effects / Q000502:physiology; D012989:Soil Pollutants / Q000378:metabolism / Q000633:toxicity*; D018675:Toxicity Tests
D052998:Microcystins; D012989:Soil Pollutants; D002104:Cadmium
Antioxidative responses; Cadmium; Microcystins; Microcystis aeruginosa; Rice seedlings