Influence of phosphorus and pH on the fungicidal potential of <i>Anabaena</i> strains

Chaudhary, Vidhi; Prasanna, Radha; Bhatnagar, A. K.

doi:10.1002/jobm.201100520

Cited by 12 publications

(6 citation statements)

References 37 publications

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“…; Chaudhary et al . ). However, in the field, pH is affected by the uptake of carbon dioxide during cyanobacterial photosynthesis, which increases the pH surrounding the cyanobacterial cell (Planavsky et al .…”

Section: Discussionmentioning

confidence: 97%

Spatial and seasonal shifts in bloom‐forming cyanobacteria in Lake Chaohu: Patterns and driving factors

Zhang

Yang

et al. 2015

Phycological Research

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The patterns of spatial and temporal shifts in bloom-forming cyanobacteria and the driving factors for these patterns were determined by analyzing the distribution of these cyanobacteria in Lake Chaohu using data from satellite images and field samples collected during 2012 and 2013. The cyanobacterial blooms primarily occupied the western region of Lake Chaohu, and the direction and speed of the prevailing wind determined the spatial distribution of these blooms. The cyanobacteria in Lake Chaohu were dominated by species of Microcystis and Anabaena. Microcystis reached its peak in June, and Anabaena had peaks in May and November, with an overall biomass that was higher than that of Microcystis. Microcystis generally occupied the western region of the lake in summer, whereas Anabaena dominated in other regions and seasons. Temperature may be responsible for these seasonal shifts. However, total phosphorus (TP), pH, temperature, turbidity and nitrate/nitrite nitrogen determined the coexistence of the two genera in different regions in summer. TP was correlated with Microcystis dominance, and pH and light availability were correlated with Anabaena dominance. Our results contribute to the understanding of shifts in bloom-forming cyanobacteria and are important for the control of cyanobacterial blooms.

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Section: Discussionmentioning

confidence: 97%

Spatial and seasonal shifts in bloom‐forming cyanobacteria in Lake Chaohu: Patterns and driving factors

Zhang

Yang

et al. 2015

Phycological Research

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“…At pH values of 5 and 9, the synthesis of the metabolite undergoes a reduction of about 98.35 and 63.8%, respectively [ 306 ]. Chaudhary, Prasanna, and Bhatnagar (2012) [ 317 ] demonstrated that the growth of Anabaena strains differ under distinct pH conditions, thus resulting in significant changes in the fungicidal potential of the cell-free filtrate obtained from these cyanobacteria. Using P. debaryanum and F. oxysporum during the experiment, it was noted that such consequences vary depending on the target microorganism utilized.…”

Section: Regulationmentioning

confidence: 99%

“…Using P. debaryanum and F. oxysporum during the experiment, it was noted that such consequences vary depending on the target microorganism utilized. For example, although a pH of 5.5 provides the best conditions for the acquisition of antimicrobial metabolites from the RP69 strain that works against P. debaryanum , the same pH has no elicitor effect on the antagonistic activity that works against F. oxysporum , compared with the other tested pH values (7.5 and 9.5) [ 317 ]. On some occasions, the optimum pH for cyanobacterial growth offered the most favorable environment for the synthesis of the biocide compounds, S. maxima and S. ocellatum ; indeed, their best growth and inhibitory compound production occurred between the pH values of 8.0–8.5 [ 299 , 318 ].…”

Section: Regulationmentioning

confidence: 99%

Cyanobacteria: A Promising Source of Antifungal Metabolites

et al. 2023

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Cyanobacteria are a rich source of secondary metabolites, and they have received a great deal of attention due to their applicability in different industrial sectors. Some of these substances are known for their notorious ability to inhibit fungal growth. Such metabolites are very chemically and biologically diverse. They can belong to different chemical classes, including peptides, fatty acids, alkaloids, polyketides, and macrolides. Moreover, they can also target different cell components. Filamentous cyanobacteria have been the main source of these compounds. This review aims to identify the key features of these antifungal agents, as well as the sources from which they are obtained, their major targets, and the environmental factors involved when they are being produced. For the preparation of this work, a total of 642 documents dating from 1980 to 2022 were consulted, including patents, original research, review articles, and theses.

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“…Estos valores permanecieron en el rango de 7-10 sin requerir ser controlados mediante la adición de sustancias amortiguadoras. Dicho rango resulta adecuado para el crecimiento de cada uno de los organismos presentes en el CM como proteobacterias, cianobacterias, flavobacterias, microalgas y diatomeas (Eroğlu et al 2008, Roubeix y Lancelot 2008, Chaudhary et al 2012, Hadas et al 2013, Silaban et al 2013, Hernández 2015.…”

Section: Estudiaron La Producción Deunclassified

Producción a La Intemperie De Un Consorcio Microbiano Fotosintético Fijador De Nitrógeno en Cultivo Por Lote Y Semicontinuo en Un Fotobiorreactor De Puente Aéreo De Cara Plana

Melchor

Cristiani‐Urbina

Cerrato

et al. 2017

Rev. Int. Contam. Ambie.

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Palabras clave: cianobacteria, autotrofía, biofertilizante RESUMENLas cianobacterias son organismos fotótrofos oxigénicos que tienen la capacidad de formar consorcios. Una estrategia que ha sido utilizada para mejorar la productividad de cianobacterias y microalgas en fotobiorreactores es producirlas en cultivo semicontinuo. En nuestro grupo de trabajo hemos estudiado un consorcio microbiano (CM) fotosintético con capacidad de fijar nitrógeno, constituido principalmente por cianobacterias, el cual tiene uso potencial como biofertilizante. El objetivo de este estudio fue evaluar la capacidad de producción de biomasa del CM en dos fotobiorreactores (FBR) de puente aéreo de cara plana (50 y 150 L) a la intemperie, en cultivo por lote en ambos FBR y en cultivo semicontinuo en el FBR de mayor volumen. La máxima concentración de biomasa en cultivo por lote se obtuvo en el FBR de 150 L, con un valor de 600 mg/L, en comparación a la biomasa obtenida en el FBR de 50 L, la cual fue igual a 385 mg/L. La productividad de biomasa en los FBR de 50 y 150 L fue de 0.77 y 1.19 mg/L/h, respectivamente. El cultivo del CM en semicontinuo se realizó por tres ciclos (7, 7 y 5 d cada uno, respectivamente). Se obtuvo un aumento de la productividad de biomasa tras cada ciclo, con valores de 1.86, 1.94 y 2.94 mg/L/h. Asimismo, los valores máximos de actividad de nitrogenasa se obtuvieron al final de cada ciclo, los cuales fueron de 4963, 5366 y 5689 nmol eteno/g peso seco/h, respectivamente. Estos valores fueron superiores a los obtenidos en cultivo por lote. En conclusión, es factible producir el CM en los FBR en cultivo por lote y semicontinuo a la intemperie, sin afectar su capacidad de fijación de nitrógeno.Key words: cyanobacteria, autotrophy, biofertilizer 74 ABSTRACTCyanobacteria are oxygenic phototrophic organisms that have the capacity to form consortia. One strategy that has been used to improve the productivity of cyanobacteria and algae in photobioreactors is to produce them in semicontinuous cultures. In our research group, a photosynthetic microbial consortium (MC) with nitrogen fixing capacity was studied. It consists mainly of cyanobacteria and could potentially be used as a biofertilizer. The aim of this study was to evaluate the capability to produce biomass of MC in two flat-panel airlift photobioreactors (PBR) (50 y 150 L) in batch culture, and in semicontinuous culture in a PBR with 150 L capacity, outdoors. The maximum biomass concentration in batch culture was obtained in the PBR of 150 L, with a value of 600 mg/L, in comparison with the biomass concentration obtained in the PBR of 50 L, which was equal to 385 mg/L. The biomass productivity at the end of the batch culture in both PBR (50 and 150 L) was 0.77 and 1.19 mg/L/h, respectively. The semicontinuous culture of CM was operated during three cycles (7, 7 and 5 d, respectively), attaining an increase in the biomass productivity following each cycle, with values of 1.86, 1.94 and 2.94 mg/L/h, respectively. Similarly, the maximum values of the nitrogenase activit...

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Influence of phosphorus and pH on the fungicidal potential of Anabaena strains

Cited by 12 publications

References 37 publications

Spatial and seasonal shifts in bloom‐forming cyanobacteria in Lake Chaohu: Patterns and driving factors

Spatial and seasonal shifts in bloom‐forming cyanobacteria in Lake Chaohu: Patterns and driving factors

Cyanobacteria: A Promising Source of Antifungal Metabolites

Producción a La Intemperie De Un Consorcio Microbiano Fotosintético Fijador De Nitrógeno en Cultivo Por Lote Y Semicontinuo en Un Fotobiorreactor De Puente Aéreo De Cara Plana

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