Effect Of Antifouling Agent Irgarol 1051 On The Growth Of Phaeodactylum Tricornutum

- Jul 31, 2019-

Irgarol 1051 (2-methylthio-4-tert-butylamino-6-cyclopropylamino-s-triazine) is a triazine-based organic herbicide that acts as a photosystem II (PSII) inhibitor to effectively inhibit marine-attached algae. Growth, often combined with cuprous oxide to form a composite antifouling agent to achieve control of marine fouling organisms. In recent years, Irgarol 1051, a new antifouling agent that combines copper compounds, has become one of the major products in the marine antifouling coatings market due to the total ban on organotin antifouling agents. In the marine antifouling process, Irgarol 1051

The rate of 2.5~16 g/cm2/d is released into the surrounding water body, which is the main way to enter the water body. Due to the slow degradation of Irgarol 1051, it is difficult to be degraded by biological or abiotic processes. The half-life is as long as 100-350 d, and its mass concentration in nearshore waters has reached g/L. It is the most widely used antifouling agent. The most easily detected, half-fading in the environment

One of the longer antifouling agents.

Studies have shown that Irgarol 1051 can inhibit the survival of algae by inhibiting the electron transfer in PSII, thereby affecting the survival and growth of algae; and it has a cumulative effect on aquatic ecosystems and can cause toxic effects on non-target aquatic plants. . At present, the mechanism of toxic effects of Irgarol 1051 on aquatic plants is clear. There are three main ways: First, it binds to D1 protein in PSII, interferes with the electron transfer of PSII, and thus reduces the yield of ATP, NADPH, etc. Accumulate reactive oxygen species (ROS), increase the oxidative stress on PSII; third, hinder the turnover of D1 protein. In addition, as an environmental pollutant, Irgarol 1051 can also alter the composition and abundance of environmental biomes and induce biotolerance while producing toxic effects on aquatic ecosystems. Wendt et al. studied the effect of Irgarol 1051 supplier  on the attachment and growth of zoospores of Ulvalactuca L.

With Irgarol 1051 reaching 2000 nM, the attachment and growth of zoospores were not affected, indicating that the zoospores of Oryza sativa have strong tolerance to Irgarol 1051, and it is speculated that this tolerance may be due to glutathione. Peptide S transferase-based enzymatic detoxification system.

Antifouling agent Irgarol 1051 supplier inhibits the growth of P. tricornutum and induces its biotolerance, but the mechanism of tolerance needs further study. Under the stress of Irgarol 1051, the content of chlorophyll a and soluble protein in P. tricornutum increased gradually, which was used to resist the stress of Irgarol 1051 and maintain its growth state. Under the stress of Irgarol 1051, obvious physiological and biochemical reactions occurred in P. tricornutum cells, such as the increase of SOD activity and the decrease of MDA content, indicating that the balance between ROS production and elimination in cells was related to the quality of Irgarol 1051. The increase of concentration is gradually destroyed, and the accumulation of ROS can cause the destruction of algal cell membrane, which affects the growth and physiological characteristics of P. tricornutum.