College of Forest Resources and Environment, Nanjing Forestry University, Nanjing 210037, PR China.
Ecotoxicol Environ Saf. 2011 May;74(4):1006-10. doi: 10.1016/j.ecoenv.2011.01.014. Epub 2011 Feb 19.
Many measures have been developed to control the harmful algal blooms that are potentially threatening potable waters. The pilot experiments showed that the unfiltered and the sterile-filtered decoctions of radix Astragali inhibited the growth of Microcystis aeruginosa. The inhibitory effect diminished in natural pond conditions after 68 days, due to photo-degradation of the flavonoids from radix Astragali that appear to be responsible for the action on M. aeruginosa. Four phases (assemblage, conglomeration, cell membrane destruction and decomposition) can be characterized in the process of cell death with increasing decoction dose. The quantum yields and electron transport rates of photosynthesis system II of M. aeruginosa cells markedly decreased during contact with the decoction, resulting in the disruption of M. aeruginosa photosynthesis. The results indicate that the application of radix Astragali decoction for the inhibition of M. aeruginosa growth is feasible when the dose is less than 20 ml L(-1).
已经开发出许多措施来控制可能威胁饮用水安全的有害藻类水华。初步试验表明，未经滤和无菌过滤的黄芪水提液可以抑制铜绿微囊藻的生长。68 天后，在自然池塘条件下，由于黄酮类化合物的光降解，这种抑制作用减弱，而黄酮类化合物似乎是对铜绿微囊藻起作用的物质。在细胞死亡过程中，随着剂量的增加，可以分为四个阶段（聚集、凝聚、细胞膜破坏和分解）。铜绿微囊藻细胞的光合作用系统 II 的量子产率和电子传递速率在与水提液接触过程中显著降低，导致铜绿微囊藻光合作用的破坏。结果表明，当剂量小于 20ml/L 时，应用黄芪水提液抑制铜绿微囊藻的生长是可行的。
