近红外光源对光合细菌生长的影响

光合细菌的光合色素能吸收近红外光进行光合作用.利用加可见光滤光镜的卤钨灯作为近红外光源,照射光合细菌,探讨其对光合细菌生长的影响.结果表明,相对于可见光,近红外光对光合细菌的生长有明显促进作用,可使最大菌体浓度提高45％以上.近红外光照强度饱和区为20W～35W之间,低于20W时,光合细菌的生长速率随光照强度升高而升高；超过50W后,近红外光对光合细菌产生抑制作用.温度和pH值2个培养参数对近红外光的光照效果没有明显的影响.

Influence of near-infrared on growth of photosynthetic bacteria

The photosynthetic pigments can absorb near-infrared lights for photosynthesis.Halogen tungsten lamp filtered with visible-light filter lens as light source,influence of photosynthetic bacteria growth was researched.The results were as follows： compared with visible-light,near-infrared lights can promote photosynthetic bacteria growth markedly and can increase the max cell concentration about 45%;the region of near-infrared light saturation was between 20W to 35W;when lower than 20W,growth rate of photosynthetic bacteria increased with light intensity increasing;when higher than 50W,near-infrared light could inhibit photosynthetic bacteria growth.The temperature and pH value had no influence on the near-infrared light effect.