Interactive effects of cadmium and Microcystis aeruginosa (cyanobacterium) on the growth, antioxidative responses and accumulation of cadmium and microcystins in rice seedlings
Interactive effects of cadmium and Microcystis aeruginosa (cyanobacterium) on the growth, antioxidative responses and accumulation of cadmium and microcystins in rice seedlings
复制标题
镉和铜绿微囊藻（蓝藻）的相互作用对水稻幼苗生长、抗氧化反应以及镉和微囊藻毒素积累的影响
DOI：
10.1007/s10646-016-1714-y
复制
发表时间：
2016-10-01
期刊：
影响因子：
2.7
通讯作者：
Shao, Jihai
中科院分区：
文献类型：
--
作者：
Kuang, Xiaolin;Gu, Ji-Dong;Shao, Jihai
镉污染和有害的蓝藻繁殖是两个突出的环境问题。镉（II）和有害蓝藻对水稻幼苗的相互作用尚不清楚。为了阐明这一问题，本研究研究了镉（II）和铜绿微囊藻FACHB905对水稻幼苗生长和抗氧化反应的交互作用，以及镉（II）和微囊藻毒素的积累。结果表明，镉胁迫对水稻幼苗生长有抑制作用，接种铜绿假单胞菌FACHB905对水稻幼苗生长有促进作用。镉胁迫诱导水稻幼苗氧化损伤。接种铜绿假单胞菌FACHB905可减轻镉（II）对水稻幼苗的毒性。铜绿假单胞菌FACHB905降低了水稻幼苗中镉（II）的积累，但增加了镉（II）从根向茎部的转运。镉降低了水稻幼苗微囊藻毒素的积累。本研究结果表明，镉（II）和铜绿假单胞菌对水稻幼苗具有拮抗毒性。本研究结果为镉（II）和有害蓝藻共同污染的生态和公共卫生风险评估提供了新的视角。
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.