杉木粉对塔玛亚历山大藻生长的抑制作用

近年来 ,世界范围内赤潮 (HABs)发生的频次有明显增长的趋势。尽管已发展了多种控制赤潮的方法 ,但真正能推广应用的方法寥寥无几 ,寻找新的、高效、经济、无污染的赤潮防治方法仍然是赤潮领域研究的热点。本文研究了杉木粉对赤潮藻———塔玛亚历山大藻 (Alexandriumtamarense)生长的影响 ,并对其机制进行了初步探讨。结果显示 ,杉木粉能明显抑制塔玛亚历山大藻的生长 ,杉木粉对藻细胞有明显的沉降作用 ,其多酚提取物具有显著的抑藻作用。这些结果提示 ,杉木粉可能是一种潜在的控制赤潮藻生长的新材料 ,其抑藻机制可能与杉木粉中的多酚类活性物质和杉木粉对藻的沉降作用有关。

INHIBITORY EFFECT AND SINKING BEHAVIOUR OF WOOD MEALS FROM CHINA FIR ON ALEXANDRIUM TAMARENSE IN CULTURES

In recent years,there had been an apparent increase in the occurrence of harmful algal blooms (HABs) throughout the world. Many researchers focused on the methods to control HABs,and many approaches had been found,but seldom be applied in practice. The method to control HABs,which was economical,effective and friendly to environment,was prerequisite and the exploration of such method was getting a spotlight in HABs field. In this paper,effects of the wood meals from China fir on the growth of Alexandrium tamarense were assessed in laboratory. The inhibitory effect of the extracts from fir wood meals and sinking behaviour of the wood meals on microalga was observed,and possible mechanism was put forward. The results showed that fir wood meals whether autoclaved or not had negative impact on A. tamarense. The growth of A. tamarense was inhibited by 0.04% w/v of fir wood meals,with the cell density some 20-fold lower than the control. In addition,the extracts containing polyphenols from fir wood meal was found to inhibit the growth of A. tamarense. Sinking action of fir wood meals on microalga did occurred. These results suggested that fir wood meals may be a potential candidate for HABs control. Some algicidal bioactive substances such as polyphenols and sinking action of fir wood meals were responsible for that.