Article
Plant Sciences
Siyeon Byeon, Wookyung Song, Minjee Park, Sukyung Kim, Seohyun Kim, HoonTaek Lee, Jihyeon Jeon, Kunhyo Kim, Minsu Lee, Hyemin Lim, Sim-Hee Han, ChangYoung Oh, Hyun Seok Kim
Summary: This study revealed that the down-regulation of photosynthesis is mainly caused by the dilution of nitrogen due to an increase in nonstructural carbohydrates, rather than progressive nitrogen limitation. Different plant species exhibit varying levels of flexibility in N allocation against changes in CO2 concentration.
JOURNAL OF PLANT PHYSIOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Gaia Santini, Liliana Rodolfi, Natascia Biondi, Giacomo Sampietro, Mario R. Tredici
Summary: This study evaluated the biostimulant activity of five cyanobacterial hydrolysates on Ocimum basilicum L. grown in hydroponics. The results showed that three of the tested cyanobacterial hydrolysates were effective in promoting plant growth and increasing the number and weight of leaves, and outperformed commercial biostimulants. The biochemical characterization suggested that the observed bioactivity may be related to a high carbohydrate content in the hydrolysates.
JOURNAL OF APPLIED PHYCOLOGY
(2022)
Article
Marine & Freshwater Biology
Savenia B. Silveira, Clarisse Odebrecht
Summary: The harmful effects of toxic cyanobacterium Nodularia spumigena in marine shrimp production ponds in Brazil were studied. Light intensity and the concentration of dissolved inorganic nitrate and phosphate were found to influence the growth, toxin concentration, heterocyte formation, and akinete germination of N. spumigena. Phosphate availability was identified as the main factor favoring the growth of N. spumigena and the formation and germination of akinetes, with the concentration of nodularin per cell highest under phosphate deficiency.
Article
Environmental Sciences
Fei Zhao, Sujin Zhang, Ruonan Chen, Liyun Xiao, Guize Luan, Siwen Feng, Zhiqiang Xie
Summary: The study found that the predictive model effectively predicts the dynamic transfer of cyanobacteria, which can help decision-makers monitor lake health.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Pilar Aguila-Carricondo, Juan Pablo de la Roche Cadavid, Pedro Luis Galan, Luis Fernando Bautista, Gemma Vicente
Summary: Microalgae and cyanobacteria consortia were used to develop sustainable and cost-effective biorefineries for producing cosmetic ingredients and bioenergy. The extraction of chlorophylls was optimized using solvent screening and cell disruption experiments. High-potential antioxidant chlorophyll extracts were obtained using ethanol and water as solvents. The residual biomass of the consortia was found to have a higher cumulative biomethane production compared to the initial consortia. Overall mass balances showed that it is possible to recover up to 100% of the consortia weight as cosmetic ingredients, biogas, and fertilizers or cultivation media.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Biochemistry & Molecular Biology
Kosuke Inabe, Ayaka Miichi, Mami Matsuda, Takanobu Yoshida, Yuichi Kato, Ryota Hidese, Akihiko Kondo, Tomohisa Hasunuma
Summary: Cyanobacteria exhibit different metabolic profiles and growth rates depending on whether they are grown in NH4Cl or NaNO3 medium. The assimilation rate of nitrogen is higher in NH4Cl medium, leading to more abundant metabolites involved in the CBB cycle, glycolysis, TCA cycle, and amino acids. The GS-GOGAT cycle for nitrogen assimilation also varies between the two nitrogen sources.
Article
Plant Sciences
Karl Kasper, Ilka N. Abreu, Kirstin Feussner, Krzysztof Zienkiewicz, Cornelia Herrfurth, Till Ischebeck, Dennis Janz, Andrzej Majcherczyk, Kerstin Schmitt, Oliver Valerius, Gerhard H. Braus, Ivo Feussner, Andrea Polle
Summary: This study investigated how variations in nitrogen nutrition affected the metabolome and proteome of xylem sap, as well as the growth of the xylem endophyte Brennaria salicis and the transcriptional re-wiring of leaf defenses in poplar. The results showed that nitrogen nutrition had a significant impact on the composition of xylem sap, leading to changes in protein and metabolite abundances. These changes in xylem composition also affected the growth of the xylem endophyte and the transcriptional landscape of leaves, influencing plant defenses.
Article
Environmental Sciences
Yinliu Wang, Signe Lett, Kathrin Rousk
Summary: This study found that moss-associated nitrogen fixation is less sensitive to organic nitrogen inputs than inorganic nitrogen inputs, and highlights the importance of considering different nitrogen forms and species-specific responses when estimating the impact of nitrogen inputs on ecosystem functions.
Article
Agronomy
Trequan McGee, Bruce Schaffer, Muhammad Adnan Shahid, Jose X. Chaparro, Ali Sarkhosh
Summary: Flooding affects the carbohydrate and nitrogen metabolism in leaves of peach trees grafted onto various Prunus rootstock cultivars. Enzymatic activities related to sucrose metabolism show significant changes in flooded trees, suggesting a potential impact on overall metabolic processes.
Article
Biotechnology & Applied Microbiology
Janine Kaewbai-ngam, Nannaphat Sukkasam, Onuma Phoraksa, Aran Incharoensakdi, Tanakarn Monshupanee
Summary: This study found that under nitrogen deprivation, the growth and protein synthesis of Synechocystis sp. PCC 6803 were inhibited while the production of glycogen and poly-3-hydroxybutyrate was enhanced. Disruption of glycogen and poly-3-hydroxybutyrate synthesis affected the production of hydrogen and cellular NAD(P)H differently. Glycogen and poly-3-hydroxybutyrate storage are important for normal growth and maximal production of proteins and photosynthetic pigments.
JOURNAL OF APPLIED PHYCOLOGY
(2022)
Article
Agronomy
Long Qian, Jingshang Xiao, Zulin Zhang, Lie Yang, Ling Xia, Maria E. Farias, Rosa Maria Torres, Li Wu
Summary: The study investigates the effect of nitrogen deposition on biocrusts, specifically on the abundance and composition of exopolysaccharides (EPSs) in the biocrusts. Nitrate-N showed no obvious effect on the cyanobacterial biomass, while ammonia-N and urea-N decreased cyanobacterial biomass and shifted bacterial communities. Additionally, higher nitrogen levels reduced EPSs content and changed the proportion of rhamnose and fucose in EPSs.
Article
Microbiology
Brenda S. Pratte, Teresa Thiel
Summary: This study identified unique and overlapping functions of two homologous transcriptional activators, CnfR1 and CnfR2, in regulating two distinct nitrogenase systems in Anabaena variabilis. CnfR1 was found to be promiscuous in activating both nitrogenase systems, while CnfR2 relied on additional cellular factors to activate only one nitrogenase system.
MICROBIOLOGY SPECTRUM
(2021)
Article
Multidisciplinary Sciences
Vanessa Krauspe, Matthias Fahrner, Philipp Spat, Claudia Steglich, Nicole Frankenberg-Dinkel, Boris Macek, Oliver Schilling, Wolfgang R. Hess
Summary: The protein NblD plays a crucial role in the degradation of phycobilisomes in cyanobacteria under nitrogen-limited conditions. Studies have shown that NblD is essential for maintaining normal growth of cyanobacterial cells during nitrogen limitation.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Biochemistry & Molecular Biology
Meng-Yun Chen, Wen-Kai Teng, Liang Zhao, Bo-Ping Han, Li-Rong Song, Wen-Sheng Shu
Summary: In this study, the evolutionary trajectory and driving forces of biological nitrogen fixation (BNF) by cyanobacteria were explored through genome analysis. The distribution of diazotrophic cyanobacteria carrying nitrogen fixation gene clusters (NFGCs) was found to be uneven and shaped by multiple independent losses. Two types of NFGCs were identified, with one type being ancestral and abundant, and the other type resembling anaerobic bacteria and sparse, possibly acquired through horizontal gene transfer. The origin of BNF in cyanobacteria coincided with major evolutionary events such as the origin of multicellularity and simultaneous genetic innovations.
MOLECULAR BIOLOGY AND EVOLUTION
(2022)
Article
Biotechnology & Applied Microbiology
Giridhar Babu Anam, Govarthanan Muthusamy, Young-Ho Ahn
Summary: Global warming and eutrophication affect the growth and toxin production of Anagnostidinema carotinosum. This study found that temperature stimulates the growth of A. carotinosum at 30 and 34 degrees C and increases cellular toxin content at 25 and 34 degrees C with increasing nitrate levels.
JOURNAL OF APPLIED MICROBIOLOGY
(2022)
Article
Environmental Sciences
J. Saul Garcia-Perez, Sara Paulina Cuellar-Bermudez, Alejandra Arevalo-Gallegos, Carmen Salinas-Salazar, Jose Rodriguez-Rodriguez, Reynaldo de la Cruz-Quiroz, Hafiz M. N. Iqbal, Roberto Parra-Saldivar
WASTE AND BIOMASS VALORIZATION
(2020)
Article
Environmental Sciences
Mercedes Llamas, Jose Antonio Magdalena, Silvia Greses, Elia Tomas-Pejo, Cristina Gonzalez-Fernandez
Summary: Short-chain fatty acids are important building blocks for bioproducts production, and their bioconversion efficiency can be enhanced by thermal and enzymatic pretreatments on microalgae biomass. Proteins were found to be the limiting factor in the conversion of raw biomass into SCFAs. The microbial community dynamics and distribution were strongly influenced by the pretreatment methods, affecting SCFAs bioconversion yields.
Article
Thermodynamics
Mercedes Llamas, Jose Antonio Magdalena, Elia Tomas-Pejo, Cristina Gonzalez-Fernandez
Editorial Material
Chemistry, Physical
Largus T. Angenent, Jose A. Magdalena, Byoung S. Jeon, Joseph G. Usack
Article
Agricultural Engineering
Jose-Luis Galvez-Martos, Silvia Greses, Jose-Antonio Magdalena, Diego Iribarren, Elia Tomas-Pejo, Cristina Gonzalez-Fernandez
Summary: Research has found that adjusting operational conditions of anaerobic digestion can result in the production of volatile fatty acids, which show better environmental behavior mainly due to the substitution of conventional chemicals.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Antonio David Moreno, Jose Antonio Magdalena, Jose Miguel Oliva, Silvia Greses, Caterina Coll Lozano, Marcos Latorre-Sanchez, Maria Jose Negro, Ana Susmozas, Raquel Iglesias, Mercedes Llamas, Elia Tomas-Pejo, Cristina Gonzalez-Fernandez
Summary: The study explored the use of municipal organic waste for the production of bioethanol and biogas, with non-isothermal and simultaneous saccharification and fermentation (NSSF) proving effective in increasing ethanol and methane yields. The research highlighted the beneficial role of NSSF in enhancing methane production during anaerobic digestion (AD), which could serve as a bioenergy source to offset operational costs.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Environmental Sciences
Jose Antonio Magdalena, Silvia Greses, Cristina Gonzalez-Fernandez
Summary: Organic fraction of municipal solid waste (OFMSW) is a promising feedstock for bioethanol production due to its richness in cellulosic materials. The remaining residue after fermentation and distillation can be utilized for anaerobic digestion (AD) to produce methane and offset production costs. The sequential combination of fermentation and AD processes allows for the conversion of organic residues into marketable bioenergy products, with potential methane production and cost reduction benefits.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Energy & Fuels
Marie Celine Noguer, Jose Antonio Magdalena, Nicolas Bernet, Renaud Escudie, Eric Trably
Summary: The adaptation of microbial communities to butyric acid can enhance hydrogen production, but it is uncertain how to select appropriate communities for complex substrates in continuous fermentation.
Review
Chemistry, Medicinal
Itzel Y. Lopez-Pacheco, Laura Isabel Rodas-Zuluaga, Sara P. Cuellar-Bermudez, Enrique Hidalgo-Vazquez, Abraham Molina-Vazquez, Rafael G. Araujo, Manuel Martinez-Ruiz, Sunita Varjani, Damia Barcelo, Hafiz M. N. Iqbal, Roberto Parra-Saldivar
Summary: Microalgae and cyanobacteria can serve as renewable biomass sources for bioplastic production, with high growth rates and no requirement for arable land. They can also be used for wastewater treatment, reducing nutrient supply.
Article
Biotechnology & Applied Microbiology
Sara P. Cuellar-Bermudez, Tom Struyf, Maxime Versluys, Wim Van den Ende, Ruddy Wattiez, Koenraad Muylaert
Summary: Nitrogen starvation in Arthrospira leads to accumulation of carbohydrates, especially glycogen, which can be used as feedstock for biofuels or in the chemical industry.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2022)
Article
Polymer Science
Alejandra Arevalo-Gallegos, Sara P. P. Cuellar-Bermudez, Elda M. M. Melchor-Martinez, Hafiz M. N. Iqbal, Roberto Parra-Saldivar
Summary: This study evaluated maltodextrin/alginate and β-glucan/alginate mixtures as wall materials for microencapsulation of Schizochytrium sp. oil, an important source of DHA. Both mixtures exhibited shear-thinning behavior, with higher viscosity in β-glucan/alginate. Maltodextrin/alginate showed more homogeneous morphology and higher oil-encapsulation efficiency (90%) compared to β-glucan/alginate (80%). Furthermore, maltodextrin/alginate microcapsules displayed prolonged stability, while β-glucan/alginate microcapsules degraded under high temperature. Therefore, maltodextrin/alginate is a suitable wall material for microencapsulation of Schizochytrium sp. oil, providing high oil-encapsulation efficiency and stable microcapsules.
Article
Chemistry, Medicinal
Itzel Y. Lopez-Pacheco, Victoria Guadalupe Ayala-Moreno, Catherinne Arlette Mejia-Melara, Jose Rodriguez-Rodriguez, Sara P. Cuellar-Bermudez, Reyna Berenice Gonzalez-Gonzalez, Karina G. Coronado-Apodaca, Leonardo I. Farfan-Cabrera, Georgia Maria Gonzalez-Meza, Hafiz M. N. Iqbal, Roberto Parra-Saldivar
Summary: The production of biomolecules by microalgae has a wide range of applications, and microalgae biomass can be produced using waste in a smaller space, showing its great potential as a source of biomass.
Review
Plant Sciences
Georgia M. Gonzalez-Meza, Joel H. Elizondo-Luevano, Sara P. Cuellar-Bermudez, Juan Eduardo Sosa-Hernandez, Hafiz M. N. Iqbal, Elda M. Melchor-Martinez, Roberto Parra-Saldivar
Summary: Food production is facing challenges due to the pandemic and climate change, and seaweeds offer a valuable opportunity for sustainable animal feed supply. Seaweeds have traditionally been used in aquafeed, but their demand in the feed market is growing parallel to the increased food demand. They are also being promoted for their nutritional benefits, containing biologically active compounds that contribute to animals' health, growth, and performance. Additionally, seaweeds possess beneficial properties such as antibacterial, antifungal, antiviral, antioxidant, and anti-inflammatory effects, making them potential sources of healthy food ingredients.
Review
Biotechnology & Applied Microbiology
Jose Antonio Magdalena, Largus T. Angenent, Joseph G. Usack
Summary: Many practitioners believe that oxygen is detrimental to anaerobic fermentation processes, but intentional oxygen sparging can effectively remove H2S in anaerobic digestion systems. Additionally, microaeration techniques have shown that small doses of oxygen can enhance process performance and promote the degradation of recalcitrant compounds. However, existing oxygen dosing techniques are imprecise, highlighting the need for robust monitoring and process control.
FERMENTATION-BASEL
(2022)
Article
Environmental Sciences
Jose Antonio Magdalena, Silvia Greses, Cristina Gonzalez-Fernandez
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2020)
Article
Biotechnology & Applied Microbiology
Sung-Yeoul Kim, Vikash Chandra Roy, Jin-Seok Park, Byung-Soo Chun
Summary: This study aims to extract functional substances from Undaria pinnatiida sporophyll using supercritical carbon dioxide (SC-CO2) and subcritical water extraction (SWE). The results showed that the consecutive green extraction method can yield extracts rich in fucoxanthin and beta-carotene, and the sporophyll of Undaria pinnatiida contains health-beneficial fatty acids. Additionally, SWE can extract substances with antioxidant, antibacterial, and antihypertensive activities.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2024)