期刊
TOXINS
卷 14, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/toxins14030215
关键词
cyanotoxins; biocrusts; loess; terrestrial cyanobacteria; sedimentary biosignatures; land restoration
资金
- ERASMUS+ mobility program [2015-2-FI01-KA107-022151, 2017-1-FI01-KA107-034440]
- Abo Akademi University Doctoral Scholarship Programme
- Alfred Kordelin Foundation [200173]
- Ministry of Education, Science and Technological Development of the Republic of Serbia [451-03-68/2022-14/200125]
- Science Fund of the Republic of Serbia [7726976]
- Integrated Strategy for Rehabilitation of Disturbed Land Surfaces and Control of Air Pollution-RECAP
- National Natural Science Foundation of China [41888101, 41625010]
This study investigated the production of cyanotoxins in biological loess crusts and cyanobacterial cultures. The results showed no detection of targeted cyanotoxins or cyanotoxin-encoding genes in the samples.
Cyanotoxins are a diverse group of bioactive compounds produced by cyanobacteria that have adverse effects on human and animal health. While the phenomenon of cyanotoxin production in aquatic environments is well studied, research on cyanotoxins in terrestrial environments, where cyanobacteria abundantly occur in biocrusts, is still in its infancy. Here, we investigated the potential cyanotoxin production in cyanobacteria-dominated biological loess crusts (BLCs) from three different regions (China, Iran, and Serbia) and in cyanobacterial cultures isolated from the BLCs. The presence of cyanotoxins microcystins, cylindrospermopsin, saxitoxins, and beta-N-methylamino-L-alanine was analyzed by liquid chromatography-tandem mass spectrometry (LC-MS/MS) method, while the presence of cyanotoxin-encoding genes (mcyE, cyrJ, sxtA, sxtG, sxtS, and anaC) was investigated by polymerase chain reaction (PCR) method. We could not detect any of the targeted cyanotoxins in the biocrusts or the cyanobacterial cultures, nor could we amplify any cyanotoxin-encoding genes in the cyanobacterial strains. The results are discussed in terms of the biological role of cyanotoxins, the application of cyanobacteria in land restoration programs, and the use of cyanotoxins as biosignatures of cyanobacterial populations in loess research. The article highlights the need to extend the field of research on cyanobacteria and cyanotoxin production to terrestrial environments.
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