[ Objective ] To explore the effect of several plant hormones on the growth of photosynthetic bacteria, so as to provide references for studying its growth promotion factors. [Method] The influence of different concentrations of indole acetic acid, a-NAA, gibberellin and mixing plant hormone on the growth of photosynthetic bacteria was observed. [ Result ] The three kinds of plant hormones can accelerate the growth of photosynthetic bacteria. Gibberellin had the most significant growth promotion effect on the photosynthetic bacteria, then was the mixing plant hormones. The optimum concentrations of indole acetic acid, a-NAA and gibbereliin are 0.5, 5 and 0.5 mg/L respectively. [Conclusion] It is feasible to promote the growth of the photosynthelic bacteria by adding some plant hormones in enrichment cultivation.%[目的]探讨几种植物激素对光合细菌生长的影响,以期为光合细菌增殖培养的促生长因子研究提供参考依据.[方法]研究了不同浓度的吲哚乙酸、α-萘乙酸和赤霉素以及混合植物激素对光合细菌生长的影响.[结果]3种植物激素对光合细菌的生长均具有促进作用,其中赤霉素效果最为明显,其次为混合植物激素.吲哚乙酸、α-萘乙酸和赤霉素促生长的最佳浓度分别为0.5、1和0.5 mg/L.[结论]该研究结果表明在增殖培养基中加入某些植物生长激素来促进光合细菌的生长是可行的.
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