Salinity tolerance and desalination properties of a Haematococcus lacustris strain from eastern Hungary
Nowadays the increasing amount of saline wastewaters has given rise to various biological desalination processes, among which the application possibilities of microalgae represents a priority research area. Next to “real” aquatic species (members of phytoplankton or phytobenthon), species from ephem...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2024-03-01
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| Series: | Frontiers in Microbiology |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmicb.2024.1332642/full |
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| author | István Bácsi István Bácsi Aida Figler Edina Simon Edina Simon Majd Muwafaq Yaqoob Kamilla Márton Viktória B-Béres |
| author_facet | István Bácsi István Bácsi Aida Figler Edina Simon Edina Simon Majd Muwafaq Yaqoob Kamilla Márton Viktória B-Béres |
| author_sort | István Bácsi |
| collection | DOAJ |
| description | Nowadays the increasing amount of saline wastewaters has given rise to various biological desalination processes, among which the application possibilities of microalgae represents a priority research area. Next to “real” aquatic species (members of phytoplankton or phytobenthon), species from ephemeral aquatic habitats or aeroterrestrial algae also could be good candidates of research studying salt tolerance or desalination ability, since salinity stress is often referred as “physiological drought” and species from ephemeral habitats can be characterized by high drought tolerance. In this study, the salinity tolerance, salt and nutrient removal ability of a Haematococcus lacustris strain from eastern Hungary were investigated. Vegetative cells showed low salt tolerance, survival was ensured by the formation of cysts up to a sodium-chloride concentration of 2,000 mg l−1. Although relatively moderate (a max. 30%) conductivity reduction and chloride removal were observed, notable (nearly 100%) nitrate and phosphate removal occurred even in the presence of 2,000 mg l−1 NaCl. Carotenoid accumulation was observed earlier and in higher extent in salt treated cultures than in drying out ones, although the amount of astaxanthin-esters was significantly higher in the cultures of drying out experiment than in the corresponding cultures of salt treatment characterized with similar chloride content. Our results suggest that algae isolates from ephemeral aquatic habitats endangered by regular drying out (exposed to special salt stress), could have notable salt tolerance and consequently successful applicability in nutrient removal processes from slightly saline wastewaters. The accumulation of valuable metabolites (such as astaxanthin) as a response to salinity stress, could enhance the economic value of the biomass. |
| first_indexed | 2024-04-24T23:54:26Z |
| format | Article |
| id | doaj.art-d33a987116084f5d88d9080f1099a457 |
| institution | Directory Open Access Journal |
| issn | 1664-302X |
| language | English |
| last_indexed | 2024-04-24T23:54:26Z |
| publishDate | 2024-03-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Microbiology |
| spelling | doaj.art-d33a987116084f5d88d9080f1099a4572024-03-14T16:31:36ZengFrontiers Media S.A.Frontiers in Microbiology1664-302X2024-03-011510.3389/fmicb.2024.13326421332642Salinity tolerance and desalination properties of a Haematococcus lacustris strain from eastern HungaryIstván Bácsi0István Bácsi1Aida Figler2Edina Simon3Edina Simon4Majd Muwafaq Yaqoob5Kamilla Márton6Viktória B-Béres7Department of Hydrobiology, University of Debrecen, Debrecen, HungaryHUN-REN−UD Functional and Restoration Ecology Research Group, Debrecen, HungaryDepartment of Bioinformatics, Semmelweis University, Budapest, HungaryDepartment of Ecology, University of Debrecen, Debrecen, HungaryHUN-REN–UD Anthropocene Ecology Research Group, Debrecen, HungaryDepartment of Hydrobiology, University of Debrecen, Debrecen, HungaryDepartment of Hydrobiology, University of Debrecen, Debrecen, HungaryFunctional Algology Research Group, HUN-REN–Centre for Ecological Research, Institute of Aquatic Ecology, Debrecen, HungaryNowadays the increasing amount of saline wastewaters has given rise to various biological desalination processes, among which the application possibilities of microalgae represents a priority research area. Next to “real” aquatic species (members of phytoplankton or phytobenthon), species from ephemeral aquatic habitats or aeroterrestrial algae also could be good candidates of research studying salt tolerance or desalination ability, since salinity stress is often referred as “physiological drought” and species from ephemeral habitats can be characterized by high drought tolerance. In this study, the salinity tolerance, salt and nutrient removal ability of a Haematococcus lacustris strain from eastern Hungary were investigated. Vegetative cells showed low salt tolerance, survival was ensured by the formation of cysts up to a sodium-chloride concentration of 2,000 mg l−1. Although relatively moderate (a max. 30%) conductivity reduction and chloride removal were observed, notable (nearly 100%) nitrate and phosphate removal occurred even in the presence of 2,000 mg l−1 NaCl. Carotenoid accumulation was observed earlier and in higher extent in salt treated cultures than in drying out ones, although the amount of astaxanthin-esters was significantly higher in the cultures of drying out experiment than in the corresponding cultures of salt treatment characterized with similar chloride content. Our results suggest that algae isolates from ephemeral aquatic habitats endangered by regular drying out (exposed to special salt stress), could have notable salt tolerance and consequently successful applicability in nutrient removal processes from slightly saline wastewaters. The accumulation of valuable metabolites (such as astaxanthin) as a response to salinity stress, could enhance the economic value of the biomass.https://www.frontiersin.org/articles/10.3389/fmicb.2024.1332642/fullsalt-treatmentdrying outHaematococcusion removalcyst formationcyst maturation |
| spellingShingle | István Bácsi István Bácsi Aida Figler Edina Simon Edina Simon Majd Muwafaq Yaqoob Kamilla Márton Viktória B-Béres Salinity tolerance and desalination properties of a Haematococcus lacustris strain from eastern Hungary Frontiers in Microbiology salt-treatment drying out Haematococcus ion removal cyst formation cyst maturation |
| title | Salinity tolerance and desalination properties of a Haematococcus lacustris strain from eastern Hungary |
| title_full | Salinity tolerance and desalination properties of a Haematococcus lacustris strain from eastern Hungary |
| title_fullStr | Salinity tolerance and desalination properties of a Haematococcus lacustris strain from eastern Hungary |
| title_full_unstemmed | Salinity tolerance and desalination properties of a Haematococcus lacustris strain from eastern Hungary |
| title_short | Salinity tolerance and desalination properties of a Haematococcus lacustris strain from eastern Hungary |
| title_sort | salinity tolerance and desalination properties of a haematococcus lacustris strain from eastern hungary |
| topic | salt-treatment drying out Haematococcus ion removal cyst formation cyst maturation |
| url | https://www.frontiersin.org/articles/10.3389/fmicb.2024.1332642/full |
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