砷在蓝藻颤藻属中的积累

Accumulation of arsenic in blue-green alga, Phormidium sp.

作者信息

Matsuto S, Kasuga H, Okumoto H, Takahashi A

出版信息

Comp Biochem Physiol C Comp Pharmacol Toxicol. 1984;78(2):377-82.

Abstract

The behavior of a blue-green alga, Phormidium sp., against inorganic arsenic dissolved in media was studied. The Phormidium sp. was shown to have capabilities of endurance against a high concentration stress of arsenic and of accumulation of arsenic. Studies on excretion of arsenic by the alga showed that there were two excretion modes, each of which had a characteristic rate constant and it could be attributed to two types of binding situations between arsenic and the tissues of the alga. The arsenate absorbed by the algae was readily reduced to arsenite within their tissues.

摘要

对一种蓝绿藻——席藻属（Phormidium sp.）针对溶解在培养基中的无机砷的行为进行了研究。结果表明，席藻属具有耐受高浓度砷胁迫以及积累砷的能力。对该藻类砷排泄的研究表明，存在两种排泄模式，每种模式都有其特征速率常数，这可归因于砷与藻类组织之间的两种结合情况。藻类吸收的砷酸盐在其组织内很容易还原为亚砷酸盐。