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Dissolved organic matter, calcium ion and extracellular polymeric substances on living associated bacteria of Microcystis colony are crucial for unicellular Microcystis to efficiently form colonies.
Yang, Chunyan; Ding, Mengyue; Hou, Kaiyu; Feng, Junzhou; Li, Xu; Pan, Xiaoyi; Yang, Caiyun; Zhang, Xiaohui; Guo, Jianlin; Dai, Xianzhu.
Afiliación
  • Yang C; Chongqing Key Laboratory of Bio-Resource Development for Bioenergy, College of Resources and Environment, Southwest University, Chongqing 400715, China.
  • Ding M; Chongqing Key Laboratory of Bio-Resource Development for Bioenergy, College of Resources and Environment, Southwest University, Chongqing 400715, China.
  • Hou K; Chongqing Key Laboratory of Bio-Resource Development for Bioenergy, College of Resources and Environment, Southwest University, Chongqing 400715, China.
  • Feng J; Chongqing Key Laboratory of Bio-Resource Development for Bioenergy, College of Resources and Environment, Southwest University, Chongqing 400715, China.
  • Li X; Chongqing Key Laboratory of Bio-Resource Development for Bioenergy, College of Resources and Environment, Southwest University, Chongqing 400715, China.
  • Pan X; Key Laboratory of Healthy Freshwater Aquaculture, Ministry of Agriculture and Rural Affairs, Key Laboratory of Fish Health and Nutrition of Zhejiang Province, Zhejiang Institute of Freshwater Fisheries, Huzhou 313001, China.
  • Yang C; Chongqing Key Laboratory of Bio-Resource Development for Bioenergy, College of Resources and Environment, Southwest University, Chongqing 400715, China.
  • Zhang X; Chongqing Key Laboratory of Bio-Resource Development for Bioenergy, College of Resources and Environment, Southwest University, Chongqing 400715, China.
  • Guo J; Key Laboratory of Healthy Freshwater Aquaculture, Ministry of Agriculture and Rural Affairs, Key Laboratory of Fish Health and Nutrition of Zhejiang Province, Zhejiang Institute of Freshwater Fisheries, Huzhou 313001, China.
  • Dai X; Chongqing Key Laboratory of Bio-Resource Development for Bioenergy, College of Resources and Environment, Southwest University, Chongqing 400715, China; National Base of International S&T Collaboration on Water Environmental Monitoring and Simulation in TGR Region (WEMST), 400716 Chongqing, Chin
J Hazard Mater ; 471: 134352, 2024 Jun 05.
Article en En | MEDLINE | ID: mdl-38677120
ABSTRACT
Microcystis typically forms colonies under natural conditions, which contributes to occurrence and prevalence of algal blooms. The colonies consist of Microcystis and associated bacteria (AB), embedded in extracellular polymeric substances (EPS). Previous studies indicate that AB can induce Microcystis to form colonies, however the efficiency is generally low and results in a uniform morphotype. In this study, by using filtrated natural water, several AB strains induced unicellular M. aeruginosa to form colonies resembling several Microcystis morphotypes. The mechanisms were investigated with Methylobacterium sp. Z5. Ca2+ was necessary for Z5 to induce Microcystis to form colonies, while dissolved organic matters (DOM) facilitated AB to agglomerate Microcystis to form large colonies. EPS of living Z5, mainly the aromatic protein components, played a key role in colony induction. Z5 initially aggregated Microcystis via the bridging effects of Ca2+ and DOM, followed by the induction of EPS synthesis and secretion in Microcystis. In this process, the colony forming mode shifted from cell adhesion to a combination of cell adhesion and cell division. Intriguingly, Z5 drove the genomic rearrangement of Microcystis by upregulating some transposase genes. This study unveiled a novel mechanism about Microcystis colony formation and identified a new driver of Microcystis genomic evolution.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Calcio / Microcystis / Matriz Extracelular de Sustancias Poliméricas Idioma: En Revista: J Hazard Mater Asunto de la revista: SAUDE AMBIENTAL Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Países Bajos

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Calcio / Microcystis / Matriz Extracelular de Sustancias Poliméricas Idioma: En Revista: J Hazard Mater Asunto de la revista: SAUDE AMBIENTAL Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Países Bajos