【摘要】 本文报道了不同浓度Se⁴⁺和Se⁶⁺对文昌鱼的毒性效应以及对文昌鱼生长的影响。研究结果表明,Se⁴⁺的毒性大于Se⁶⁺,且对文昌鱼的致毒效应与底质有关;组织学观察发现,文昌鱼中毒器官主要是鳃、肠和肌肉;适宜浓度的Se⁴⁺可明显地促进文昌鱼的生长。更多还原

【Abstract】 The paper reports the toxic effects of different dosages of selenium(Se⁴⁺ and Se⁶⁺) on amphioxus and its growth. The results showed that the toxicity of Se⁴⁺ was higher than of Se⁶⁺, and the toxic effects of selenium on the animal were concerned with the living base. The toxicity of selenium in sand-base water was lower than that in non-base water; the histology observation indicated that the poisoned organs of the animal were gill, intestine and muscle. The two species of selenium induced the gill cells to necrote, intestinal villi to drop off and muscle to wither. Because it destroied the function of the respiration and intestinal epithele, resulting in the death of the animal; the physiological dosage of Se⁴⁺ could promote the growth of amphioxus.更多还原