TY  - JOUR
AU  - Stamenković, Marija
AU  - Steinwall, Elin
AU  - Nilsson, Anders K.
AU  - Wulff, Angela
PY  - 2020
UR  - https://www.sciencedirect.com/science/article/pii/S0031942219304558?via%3Dihub
UR  - https://radar.ibiss.bg.ac.rs/handle/123456789/3529
AB  - Desmids (Zygnematophyceae) are a group of poorly studied green microalgae. The aim of the present study was to identify fatty acids (FAs) that could be used as biomarkers in desmids in general, and to determine FAs as traits within different ecophysiological desmid groups. FA profiles of 29 desmid strains were determined and analysed with respect to their geographic origin, trophic preference and age of cultivation. It appeared that merely FAs present in relatively large proportions such as palmitic, linoleic, α-linolenic and hexadecatrienoic acids could be used as biomarkers for reliable categorization of this microalgal group. Linear discriminant analysis applied to three a priori defined groups of desmids, revealed clear strain-specific characteristics regarding FA distribution, influenced by climate and trophic conditions at the source sites as well as by the age of culture and growth phase. Accordingly, when considering FAs for the determination of lower taxonomic ranks we recommend using the term "trait" instead of "biomarker", as the latter designates unchangeable "fingerprint" of a specific taxon. Furthermore, despite that desmids were regarded as microalgae having stable genomes, long-term cultivation appeared to cause modifications in FA metabolic pathways, evident as a larger proportion of stearidonic acid in desmid strains cultivated over extensive time periods (>35 years).
T2  - Phytochemistry
T1  - Fatty acids as chemotaxonomic and ecophysiological traits in green microalgae (desmids, Zygnematophyceae, Streptophyta): A discriminant analysis approach.
VL  - 170
DO  - 10.1016/j.phytochem.2019.112200
SP  - 112200
ER  - 

@article{
author = "Stamenković, Marija and Steinwall, Elin and Nilsson, Anders K. and Wulff, Angela",
year = "2020",
abstract = "Desmids (Zygnematophyceae) are a group of poorly studied green microalgae. The aim of the present study was to identify fatty acids (FAs) that could be used as biomarkers in desmids in general, and to determine FAs as traits within different ecophysiological desmid groups. FA profiles of 29 desmid strains were determined and analysed with respect to their geographic origin, trophic preference and age of cultivation. It appeared that merely FAs present in relatively large proportions such as palmitic, linoleic, α-linolenic and hexadecatrienoic acids could be used as biomarkers for reliable categorization of this microalgal group. Linear discriminant analysis applied to three a priori defined groups of desmids, revealed clear strain-specific characteristics regarding FA distribution, influenced by climate and trophic conditions at the source sites as well as by the age of culture and growth phase. Accordingly, when considering FAs for the determination of lower taxonomic ranks we recommend using the term "trait" instead of "biomarker", as the latter designates unchangeable "fingerprint" of a specific taxon. Furthermore, despite that desmids were regarded as microalgae having stable genomes, long-term cultivation appeared to cause modifications in FA metabolic pathways, evident as a larger proportion of stearidonic acid in desmid strains cultivated over extensive time periods (>35 years).",
journal = "Phytochemistry",
title = "Fatty acids as chemotaxonomic and ecophysiological traits in green microalgae (desmids, Zygnematophyceae, Streptophyta): A discriminant analysis approach.",
volume = "170",
doi = "10.1016/j.phytochem.2019.112200",
pages = "112200"
}

Stamenković, M., Steinwall, E., Nilsson, A. K.,& Wulff, A.. (2020). Fatty acids as chemotaxonomic and ecophysiological traits in green microalgae (desmids, Zygnematophyceae, Streptophyta): A discriminant analysis approach.. in Phytochemistry, 170, 112200.
https://doi.org/10.1016/j.phytochem.2019.112200

Stamenković M, Steinwall E, Nilsson AK, Wulff A. Fatty acids as chemotaxonomic and ecophysiological traits in green microalgae (desmids, Zygnematophyceae, Streptophyta): A discriminant analysis approach.. in Phytochemistry. 2020;170:112200.
doi:10.1016/j.phytochem.2019.112200 .

Stamenković, Marija, Steinwall, Elin, Nilsson, Anders K., Wulff, Angela, "Fatty acids as chemotaxonomic and ecophysiological traits in green microalgae (desmids, Zygnematophyceae, Streptophyta): A discriminant analysis approach." in Phytochemistry, 170 (2020):112200,
https://doi.org/10.1016/j.phytochem.2019.112200 . .

TY  - CHAP
AU  - Gajić, Gordana
AU  - Stamenković, Marija
AU  - Pavlović, Pavle
PY  - 2018
UR  - http://www.studiumpress.in/environment-and-photosynthesis-a-future-prospect.html
UR  - https://radar.ibiss.bg.ac.rs/handle/123456789/3037
AB  - Photosynthesis is an essential energy process in all plants and algae that sustains life on the earth. Plants are capable of converting the energy of light into a biochemical form of energy, the process that occurs in the chloroplasts. Light harvesting pigments capture the energy of photons and transfer the excitation energy to the reaction centers of the photosystems. Photosystem II oxidizes water to oxygen and provides electron flow and protons for the generation of NADPH and ATP which are used in the photosynthetic carbon assimilation process, leading to the biosynthesis of organic compounds. The essential metals such as copper, iron, manganese, and zinc are redox active transition metals which can act as cofactors of metalloproteins involved in the photosynthetic electron transport, or they are integral components of enzymes involved in the stress antioxidant response. However, metal(loid)s such as arsenic, lead, chromium, and cadmium do not have physiological functions and can be toxic at low concentrations. Metal(loid)s pollution represents a great environmental concern due to human activities (mining, coal fly ash, metal industry, agriculture practice, solid waste, and traffic) and may greatly affect photosynthesis in plants. Therefore, metal deficiency or metal excess may induce changes in pigment composition, alterations in light harvesting protein complexes, photosystem core complexes, chlorophyll fluorescence, the electron transport system, gas exchange parameters, and activity of key photosynthetic enzymes. In addition, metal(loid) stress can lead to the overproduction of reactive oxygen species which may cause extensive damage in plant cells. The chapter summarizes the present knowledge on the effects of metal(loid)s on photosynthetic process and on the defence systems of plants exposed to metal(loid) stress, such as activity of enzymatic and non-enzymatic antioxidant compounds. Additional emphasis is given to the alleviation of metal(loid)s toxicity on photosynthesis by silicon.
PB  - Studium Press (India) Pvt. Ltd.
T2  - Environment and Photosynthesis: A Future Prospect
T1  - Plant Photosynthetic Response to Metal(loid) Stress
SP  - 145
EP  - 209
UR  - https://hdl.handle.net/21.15107/rcub_ibiss_3037
ER  - 

@inbook{
author = "Gajić, Gordana and Stamenković, Marija and Pavlović, Pavle",
year = "2018",
abstract = "Photosynthesis is an essential energy process in all plants and algae that sustains life on the earth. Plants are capable of converting the energy of light into a biochemical form of energy, the process that occurs in the chloroplasts. Light harvesting pigments capture the energy of photons and transfer the excitation energy to the reaction centers of the photosystems. Photosystem II oxidizes water to oxygen and provides electron flow and protons for the generation of NADPH and ATP which are used in the photosynthetic carbon assimilation process, leading to the biosynthesis of organic compounds. The essential metals such as copper, iron, manganese, and zinc are redox active transition metals which can act as cofactors of metalloproteins involved in the photosynthetic electron transport, or they are integral components of enzymes involved in the stress antioxidant response. However, metal(loid)s such as arsenic, lead, chromium, and cadmium do not have physiological functions and can be toxic at low concentrations. Metal(loid)s pollution represents a great environmental concern due to human activities (mining, coal fly ash, metal industry, agriculture practice, solid waste, and traffic) and may greatly affect photosynthesis in plants. Therefore, metal deficiency or metal excess may induce changes in pigment composition, alterations in light harvesting protein complexes, photosystem core complexes, chlorophyll fluorescence, the electron transport system, gas exchange parameters, and activity of key photosynthetic enzymes. In addition, metal(loid) stress can lead to the overproduction of reactive oxygen species which may cause extensive damage in plant cells. The chapter summarizes the present knowledge on the effects of metal(loid)s on photosynthetic process and on the defence systems of plants exposed to metal(loid) stress, such as activity of enzymatic and non-enzymatic antioxidant compounds. Additional emphasis is given to the alleviation of metal(loid)s toxicity on photosynthesis by silicon.",
publisher = "Studium Press (India) Pvt. Ltd.",
journal = "Environment and Photosynthesis: A Future Prospect",
booktitle = "Plant Photosynthetic Response to Metal(loid) Stress",
pages = "145-209",
url = "https://hdl.handle.net/21.15107/rcub_ibiss_3037"
}

Gajić, G., Stamenković, M.,& Pavlović, P.. (2018). Plant Photosynthetic Response to Metal(loid) Stress. in Environment and Photosynthesis: A Future Prospect
Studium Press (India) Pvt. Ltd.., 145-209.
https://hdl.handle.net/21.15107/rcub_ibiss_3037

Gajić G, Stamenković M, Pavlović P. Plant Photosynthetic Response to Metal(loid) Stress. in Environment and Photosynthesis: A Future Prospect. 2018;:145-209.
https://hdl.handle.net/21.15107/rcub_ibiss_3037 .

Gajić, Gordana, Stamenković, Marija, Pavlović, Pavle, "Plant Photosynthetic Response to Metal(loid) Stress" in Environment and Photosynthesis: A Future Prospect (2018):145-209,
https://hdl.handle.net/21.15107/rcub_ibiss_3037 .

TY  - JOUR
AU  - Stamenković, Marija
AU  - Steinwall, Elin
AU  - Nilsson, Anders K.
AU  - Wulff, Angela
PY  - 2018
UR  - http://link.springer.com/10.1007/s10811-018-1598-8
UR  - https://radar.ibiss.bg.ac.rs/handle/123456789/3129
AB  - This study aimed to investigate fatty acid content and productivity of the insufficiently investigated group of freshwater microalgae—desmids (Zygnematophyceae, Streptophyta)—and to estimate their commercial potential. A total of 29 desmid strains of various environmental preferences were grown in standard cultivation conditions to assess fatty acid concentration and composition and biomass productivity during the growth phases. Six desmid strains belonging to Cosmarium crenatum var. boldtianum, C. meneghinii, C. regnellii var. pseudoregnellii, C. leave, Staurastrum boreale, and S. punctulatum had distinctly high total fatty acid contents (> 200 mg g−1 dry weight), among which C. crenatum had by far the highest average of total fatty acids (308.1 mg g−1 dry weight). Despite that desmids were grown in a medium which was not enriched with nutrients and CO2, these six strains achieved moderate biomass productivity (up to 0.14 g dry weight L−1 day−1), while the fatty acid productivity was in the range 8–11.1 mg L−1 day−1. The relatively high amounts of linoleic and palmitic acids in C. crenatum var. boldtianum and C. meneghinii were comparable to those found in several commercially grown plants, indicating that fatty acid extracts of these desmids could be utilized in cosmetics, pharmacy, medicine, or in additional industrial applications. On the other hand, the high proportion of oleic acid in a new isolate of Staurastrum boreale, along with its relatively high biomass productivity and cell size, pointed that this strain might be used for further investigations regarding biodiesel production.
T2  - Journal of Applied Phycology
T1  - Desmids (Zygnematophyceae, Streptophyta) as a promising freshwater microalgal group for the fatty acid production: results of a screening study
DO  - 10.1007/s10811-018-1598-8
ER  - 

@article{
author = "Stamenković, Marija and Steinwall, Elin and Nilsson, Anders K. and Wulff, Angela",
year = "2018",
abstract = "This study aimed to investigate fatty acid content and productivity of the insufficiently investigated group of freshwater microalgae—desmids (Zygnematophyceae, Streptophyta)—and to estimate their commercial potential. A total of 29 desmid strains of various environmental preferences were grown in standard cultivation conditions to assess fatty acid concentration and composition and biomass productivity during the growth phases. Six desmid strains belonging to Cosmarium crenatum var. boldtianum, C. meneghinii, C. regnellii var. pseudoregnellii, C. leave, Staurastrum boreale, and S. punctulatum had distinctly high total fatty acid contents (> 200 mg g−1 dry weight), among which C. crenatum had by far the highest average of total fatty acids (308.1 mg g−1 dry weight). Despite that desmids were grown in a medium which was not enriched with nutrients and CO2, these six strains achieved moderate biomass productivity (up to 0.14 g dry weight L−1 day−1), while the fatty acid productivity was in the range 8–11.1 mg L−1 day−1. The relatively high amounts of linoleic and palmitic acids in C. crenatum var. boldtianum and C. meneghinii were comparable to those found in several commercially grown plants, indicating that fatty acid extracts of these desmids could be utilized in cosmetics, pharmacy, medicine, or in additional industrial applications. On the other hand, the high proportion of oleic acid in a new isolate of Staurastrum boreale, along with its relatively high biomass productivity and cell size, pointed that this strain might be used for further investigations regarding biodiesel production.",
journal = "Journal of Applied Phycology",
title = "Desmids (Zygnematophyceae, Streptophyta) as a promising freshwater microalgal group for the fatty acid production: results of a screening study",
doi = "10.1007/s10811-018-1598-8"
}

Stamenković, M., Steinwall, E., Nilsson, A. K.,& Wulff, A.. (2018). Desmids (Zygnematophyceae, Streptophyta) as a promising freshwater microalgal group for the fatty acid production: results of a screening study. in Journal of Applied Phycology.
https://doi.org/10.1007/s10811-018-1598-8

Stamenković M, Steinwall E, Nilsson AK, Wulff A. Desmids (Zygnematophyceae, Streptophyta) as a promising freshwater microalgal group for the fatty acid production: results of a screening study. in Journal of Applied Phycology. 2018;.
doi:10.1007/s10811-018-1598-8 .

Stamenković, Marija, Steinwall, Elin, Nilsson, Anders K., Wulff, Angela, "Desmids (Zygnematophyceae, Streptophyta) as a promising freshwater microalgal group for the fatty acid production: results of a screening study" in Journal of Applied Phycology (2018),
https://doi.org/10.1007/s10811-018-1598-8 . .

TY  - JOUR
AU  - Stamenković, Marija
AU  - Hanelt, Dieter
PY  - 2017
UR  - http://link.springer.com/10.1007/s10750-016-2958-5
UR  - https://radar.ibiss.bg.ac.rs/handle/123456789/2618
AB  - Although conjugating algae are considered to have a cosmopolitan freshwater distribution, numerous ecological and taxonomic investigations revealed that many desmid taxa (at the level of genus, species and variety) are capable of occupying specific geographic zones, characterized by particular climatic attributes. Earlier studies have dealt with influences of temperature and irradiation (photosynthetically active radiation and ultraviolet radiation) on the physiology and ultrastructure of desmids. Yet, recent investigations demonstrated a clear relationship between these climatic factors and the distributional potential of conjugating algae, taking into account their photosynthetic, physiological and ultrastructural adaptations which had been revealed during and after certain temperature and irradiation treatments. Despite the fact that desmids can be considered as high-light-adapted algae, various species- and strain-specific characteristics and adaptations appeared in accordance with the light intensities predominating at their source localities, as estimated by their photosynthetic performance (obtained from PAM fluorometry and oxygen evolution measurements), pigment composition and morpho-anatomical characteristics. Interestingly, the high-light adaptation of photosynthesis as well as the relatively high growth temperature optima for majority of the desmid species investigated may provide some support for Coesel’s hypothesis on the origin of desmids in the tropical zone.
T2  - Hydrobiologia
T1  - Geographic distribution and ecophysiological adaptations of desmids (Zygnematophyceae, Streptophyta) in relation to PAR, UV radiation and temperature: a review
IS  - 1
VL  - 787
DO  - 10.1007/s10750-016-2958-5
SP  - 1
EP  - 26
ER  - 

@article{
author = "Stamenković, Marija and Hanelt, Dieter",
year = "2017",
abstract = "Although conjugating algae are considered to have a cosmopolitan freshwater distribution, numerous ecological and taxonomic investigations revealed that many desmid taxa (at the level of genus, species and variety) are capable of occupying specific geographic zones, characterized by particular climatic attributes. Earlier studies have dealt with influences of temperature and irradiation (photosynthetically active radiation and ultraviolet radiation) on the physiology and ultrastructure of desmids. Yet, recent investigations demonstrated a clear relationship between these climatic factors and the distributional potential of conjugating algae, taking into account their photosynthetic, physiological and ultrastructural adaptations which had been revealed during and after certain temperature and irradiation treatments. Despite the fact that desmids can be considered as high-light-adapted algae, various species- and strain-specific characteristics and adaptations appeared in accordance with the light intensities predominating at their source localities, as estimated by their photosynthetic performance (obtained from PAM fluorometry and oxygen evolution measurements), pigment composition and morpho-anatomical characteristics. Interestingly, the high-light adaptation of photosynthesis as well as the relatively high growth temperature optima for majority of the desmid species investigated may provide some support for Coesel’s hypothesis on the origin of desmids in the tropical zone.",
journal = "Hydrobiologia",
title = "Geographic distribution and ecophysiological adaptations of desmids (Zygnematophyceae, Streptophyta) in relation to PAR, UV radiation and temperature: a review",
number = "1",
volume = "787",
doi = "10.1007/s10750-016-2958-5",
pages = "1-26"
}

Stamenković, M.,& Hanelt, D.. (2017). Geographic distribution and ecophysiological adaptations of desmids (Zygnematophyceae, Streptophyta) in relation to PAR, UV radiation and temperature: a review. in Hydrobiologia, 787(1), 1-26.
https://doi.org/10.1007/s10750-016-2958-5

Stamenković M, Hanelt D. Geographic distribution and ecophysiological adaptations of desmids (Zygnematophyceae, Streptophyta) in relation to PAR, UV radiation and temperature: a review. in Hydrobiologia. 2017;787(1):1-26.
doi:10.1007/s10750-016-2958-5 .

Stamenković, Marija, Hanelt, Dieter, "Geographic distribution and ecophysiological adaptations of desmids (Zygnematophyceae, Streptophyta) in relation to PAR, UV radiation and temperature: a review" in Hydrobiologia, 787, no. 1 (2017):1-26,
https://doi.org/10.1007/s10750-016-2958-5 . .