CAJ | 학술논문

探讨了不同浓度Cu~(2+)长期暴露对三角褐指藻生长、光合作用、呼吸作用和色素含量等生理特性的影响.结果表明:三角褐指藻在较低浓度下 (0.25mg·L~(-1),0.5 mg·L~(-1)) 生长受到刺激,而在高浓度下(1.5 mg·L-1)则下降.叶绿素荧光参数有效光化学效率(Yield)与最大光化学效率(Fv/Fm)对Cu~(2+)非常敏感,它们均随Cu~(2+)的升高而显著下降;Cu~(2+)暴露对光合作用速率也具有抑制作用;而在Cu~(2+)长期暴露下,类胡萝卜素含量比对照组高,但提高的程度随Cu~(2+)浓度升高而下降.这些结果说明,叶绿素荧光参数可以作为三角褐指藻受到Cu~(2+)胁迫的灵敏指标;光合作用与生长并不耦合;类胡萝卜素含量和呼吸作用速率升高可能能够降低Cu~(2+)对三角褐指藻的毒性.
탐토료불동농도Cu~(2+)장기폭로대삼각갈지조생장、광합작용、호흡작용화색소함량등생리특성적영향.결과표명:삼각갈지조재교저농도하 (0.25mg·L~(-1),0.5 mg·L~(-1)) 생장수도자격,이재고농도하(1.5 mg·L-1)칙하강.협록소형광삼수유효광화학효솔(Yield)여최대광화학효솔(Fv/Fm)대Cu~(2+)비상민감,타문균수Cu~(2+)적승고이현저하강;Cu~(2+)폭로대광합작용속솔야구유억제작용;이재Cu~(2+)장기폭로하,류호라복소함량비대조조고,단제고적정도수Cu~(2+)농도승고이하강.저사결과설명,협록소형광삼수가이작위삼각갈지조수도Cu~(2+)협박적령민지표;광합작용여생장병불우합;류호라복소함량화호흡작용속솔승고가능능구강저Cu~(2+)대삼각갈지조적독성.
This paper investigates the effect of the long-term exposure of different concentrations of copper (Ⅱ) on growth, photosynthesis, respiration and contents of pigments in the diatom Phaeodactylum triconutum. The results showed that the growth rates were stimulated under low concentration of Cu~(2+) (0.25-0.5mg·L~(-1)) , but were depressed under high concentration of Cu~(2+) (1.5mg·L~(-1)) . Both effective quantum efficiency (Yield) and the optimal quantum yield (Fv/Fm) were sensitive to Cu~(2+), being markedly reduced with the increase of Cu~(2+) concentration. Photosynthetic rates were also inhibited with the exposure to Cu~(2+). However, the contents of carotenoid of the alga exposed to Cu~(2+) were higher than the control, but the contents decreased while concentrations of Cu~(2+) increased. It is proposed that chlorophyll fluorescence parameters can be a sensitive indication for Cu~(2+) stress. Photosynthesis is not coupled with the growth. The increase of contents of carotenoids and the rates of respiration may protect Phaeodactylum triconutum from the toxicity of copper.