Effects of plant hormone IAA and vitamin $ B_{12} $ on growth and aggregation of Chlamydomonas microsphaera

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Dec.2025, Vol.48 No.12: 1621-1628

DOI: 10.3969/j.issn.1003-5060.2025.12.007

Authors

WANG Ke $ ^{1} $, CHEN Guowei $ ^{1} $, JIA Wei $ ^{1,2} $, WU Xuefei $ ^{1} $, LIU Li $ ^{1} $

(1. School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China; 2. Hefei Municipal Design and Research Institute Co., Ltd., Hefei 230041, China)

Abstract and Keywords

Abstract: In order to effectively cultivate and collect microalgae, this paper focused on Chlamydomonas microsphaera and studied the effects of plant growth hormone indole-3-acetic acid (IAA) and vitamin $ B_{12} $ on microalgae growth and aggregation in biological collection methods. The results showed that both IAA and $ B_{12} $ had a promoting effect on the aggregation of microalgae, and the higher the concentration of IAA and $ B_{12} $, the better the promoting effect, but it would inhibit the growth of microalgae. In addition, it was found that the aggregation rate of microalgae in the bacterial-algal system was higher than that in the pure algal system, but the biomass was lower than that in the pure algal system. In a bacterial-algal co-culture system with an initial IAA concentration of 0.1 mg/L and a ratio of bacteria to algae of 3:1, the maximum microalgae aggregation rate was 39%. This study provides a theoretical basis and parameter reference for the effective cultivation and collection of microalgae.

Keywords: Chlamydomonas microsphaera; bacterial-algal system; microalgae biomass; microalgae aggregation rate

作者信息

汪锞 $ ^{1} $，陈国炜 $ ^{1} $，贾伟 $ ^{1,2} $，吴雪菲 $ ^{1} $，刘丽 $ ^{1} $

(1. 合肥工业大学土木与水利工程学院，安徽合肥 230009；2. 合肥市市政设计研究总院有限公司，安徽合肥 230041)

摘要和关键词

摘要: 为了有效培养和收集微藻，文章以小球衣藻（Chlamydomonas microsphaera）为研究对象，研究生物收集法中植物生长激素吲哚乙酸（indole-3-acetic acid，IAA）和维生素 $ B_{12} $对于微藻生长与聚集的影响。结果表明：IAA和 $ B_{12} $对于微藻的聚集均有促进效果，且IAA和 $ B_{12} $质量浓度越高，促进效果越好，但是会抑制微藻的生长，此外，微藻在菌藻体系中的聚集率优于纯藻体系，但是微藻细胞数量却低于纯藻体系；在IAA初始质量浓度为0.1 mg/L、菌藻细胞数量比为3：1的菌藻共培养体系中有最大微藻聚集率39%。该研究可为有效培养和收集微藻提供一定理论基础和参数依据。

关键词: 小球衣藻；菌藻体系；微藻生物量；微藻聚集率

Funding

国家自然科学基金资助项目（42277298）

合肥工业大学学报(自然科学版)

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