摘要:
本文研究了萘及其衍生物(萘、1-萘酚、2-萘酚和1-萘胺)对普通小球藻的生长、叶绿素含量、光合强度和呼吸强度的影响。萘、1-萘酚和1-萘胺在低浓度下能促进普通小球藻的生长,高浓度则抑制藻的生长;2-萘酚在实验浓度下都抑制藻的生长。萘、1-萘酚、2-萘酚和1-萘胺的96hEC50分别为98.06、11.87、13.39和6.95mg/L。萘及其衍生物对叶绿素含量和光合强度的影响比对生长的影响强,而对叶绿素含量的影响又比对光合强度的影响强。可以这样认为:萘及其衍生物对普通小球藻生长的抑制是通过抑制藻叶绿素a的形成,进而降低光合强度实现的。低浓度的萘和1-萘酚增强普通小球藻的呼吸强度,而高浓度则减弱;与此相反,低浓度的2-萘酚对藻的呼吸强度影响不大,高浓度能显著增强;在实验浓度下的1-萘胺使藻呼吸强度明显减弱,但随着时间的推移,呼吸强度出现回升,且高浓度回升较快。
Abstract:
In this paper, it was studied that the effects of naphthalene and its derivants ( naphthalene, 1-naphthol, 2-naphthol and 1-naphthylamine) on growth, chlorophyll a content, intensity of photosynthesis and respiration of C.vulgaris.Naphthalene, 1-naphthol and 1-naphthylamine in low concentrations stimulated the growth of Chlorella vulgaris, but these chemicals in higher concentrations inhabited its growth significantly.2-naphthol inhabited the growth in all concentrations (1 to 40 mg/L) tested.The EC50 of naphthalene, 1-naphthol, 2-naphthol and 1-naphthylamine were 98.06, 11.87, 13.39 and 6.95mg/L, respectively.The toxic effects of naphthalene and its derivants on chlorophyll a content and intensity of photosynthesis were stronger than those of growth.Naphthalene and 1-naphthol in low concentrations, intensity of respiration of C.vulgaris were of stimulative effects, but at higher concentrations, the intensity reduced.On the contrary, 2-naphthol did not affect intensity of respiration of C.vulgaris at low concentrations, the intensity increased significantly.1-Naphthylamine reduced respiration intensity of C.vulgaris, but then increased slowly.
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