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Effects of a novel allelochemical ethyl 2-methyl acetoacetate (EMA) on the ultrastructure and pigment composition of cyanobacterium Microcystis aeruginosa.
Bull Environ Contam Toxicol. 2009 Oct; 83(4):502-8.BE

Abstract

Allelochemical ethyl 2-methyl acetoacetate (EMA) can significantly inhibit the growth of bloom-forming Microcystis aeruginosa. In order to assess the implication of the damage of EMA on the algal photosynthetic apparatus, the effects of EMA on the algal ultrastructure and pigment composition were investigated. At initial exposure time to EMA (0-40 h), algal allophycocyanin, phycoerythrin and carotenoid degraded firstly; chlorophyll a increased, especially by 47% in the algae exposed to 2 mg L(-1) of EMA; phycocyanin was not significantly affected; lipid bodies increased remarkably. After 40 h of EMA exposure, chlorophyll a decreased gradually, especially by 45% in the algae exposed to 4 mg L(-1) of EMA; lipid bodies greatly reduced but cyanophycin granules accumulated; thylakoid structures were dissolved or disappeared with the presence of numerous vacuoles. These results showed that all ophycocyanin, phycoerythrin and carotenoid were more sensitive to EMA than other pigments, the cells of M. aeruginosa was stressed by EMA with the occurrence of cyanophycin granules and the photosynthesis pigments and ultrastructure of M. aeruginosa were quickly destroyed by EMA with exposure time increasing.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Hong Y
College of Environmental Science and Engineering, Beijing Forestry University, P.O. Box 60, 35# Qinghua Dong Road, Haidian District, 100083 Beijing, People's Republic of China. yuhong829908@gmail.com
Huang JJ
No affiliation info available
Hu HY
No affiliation info available

MeSH

AcetoacetatesMicrocystisPigments, BiologicalWater Pollutants, Chemical

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

19557299

Citation

Hong, Yu, et al. "Effects of a Novel Allelochemical Ethyl 2-methyl Acetoacetate (EMA) On the Ultrastructure and Pigment Composition of Cyanobacterium Microcystis Aeruginosa." Bulletin of Environmental Contamination and Toxicology, vol. 83, no. 4, 2009, pp. 502-8.
Hong Y, Huang JJ, Hu HY. Effects of a novel allelochemical ethyl 2-methyl acetoacetate (EMA) on the ultrastructure and pigment composition of cyanobacterium Microcystis aeruginosa. Bull Environ Contam Toxicol. 2009;83(4):502-8.
Hong, Y., Huang, J. J., & Hu, H. Y. (2009). Effects of a novel allelochemical ethyl 2-methyl acetoacetate (EMA) on the ultrastructure and pigment composition of cyanobacterium Microcystis aeruginosa. Bulletin of Environmental Contamination and Toxicology, 83(4), 502-8. https://doi.org/10.1007/s00128-009-9795-4
Hong Y, Huang JJ, Hu HY. Effects of a Novel Allelochemical Ethyl 2-methyl Acetoacetate (EMA) On the Ultrastructure and Pigment Composition of Cyanobacterium Microcystis Aeruginosa. Bull Environ Contam Toxicol. 2009;83(4):502-8. PubMed PMID: 19557299.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of a novel allelochemical ethyl 2-methyl acetoacetate (EMA) on the ultrastructure and pigment composition of cyanobacterium Microcystis aeruginosa. AU - Hong,Yu, AU - Huang,Jing-Jing, AU - Hu,Hong-Ying, Y1 - 2009/06/26/ PY - 2008/03/22/received PY - 2009/06/14/accepted PY - 2009/6/27/entrez PY - 2009/6/27/pubmed PY - 2009/11/10/medline SP - 502 EP - 8 JF - Bulletin of environmental contamination and toxicology JO - Bull Environ Contam Toxicol VL - 83 IS - 4 N2 - Allelochemical ethyl 2-methyl acetoacetate (EMA) can significantly inhibit the growth of bloom-forming Microcystis aeruginosa. In order to assess the implication of the damage of EMA on the algal photosynthetic apparatus, the effects of EMA on the algal ultrastructure and pigment composition were investigated. At initial exposure time to EMA (0-40 h), algal allophycocyanin, phycoerythrin and carotenoid degraded firstly; chlorophyll a increased, especially by 47% in the algae exposed to 2 mg L(-1) of EMA; phycocyanin was not significantly affected; lipid bodies increased remarkably. After 40 h of EMA exposure, chlorophyll a decreased gradually, especially by 45% in the algae exposed to 4 mg L(-1) of EMA; lipid bodies greatly reduced but cyanophycin granules accumulated; thylakoid structures were dissolved or disappeared with the presence of numerous vacuoles. These results showed that all ophycocyanin, phycoerythrin and carotenoid were more sensitive to EMA than other pigments, the cells of M. aeruginosa was stressed by EMA with the occurrence of cyanophycin granules and the photosynthesis pigments and ultrastructure of M. aeruginosa were quickly destroyed by EMA with exposure time increasing. SN - 1432-0800 UR - https://www.unboundmedicine.com/medline/citation/19557299/Effects_of_a_novel_allelochemical_ethyl_2_methyl_acetoacetate__EMA__on_the_ultrastructure_and_pigment_composition_of_cyanobacterium_Microcystis_aeruginosa_ L2 - https://dx.doi.org/10.1007/s00128-009-9795-4 DB - PRIME DP - Unbound Medicine ER -