Production of the antibiotic cyanobacterin LU-1 by Nostoc linckia CALU 892 (cyanobacterium)

Gromov, B.V.; Vepritskiy, Alexey A.; Titova, N. N.; Mamkayeva, Kira A.; Alexandrova, Olga V.

doi:10.1007/bf00003919

Cited by 67 publications

(34 citation statements)

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“…Nutrients interfered with the production of these allelopathically active compounds (Ray and Bagchi, 2001). Nostoc linckia produced and released another allelochemical named cyanobacterin LU-1 that inhibited the growth of many cyanobacteria and eukaryotic algae but not heterotrophic bacteria and fungi (Gromov et al, 1991). Nostoc strain 31 produces cyclic heptapeptides, nostocyclamide and nostocyclamide M, which are allelopathically active against cyanobacteria and algae (Todorova and Jüttner, 1995;Jüttner et al, 2001).…”

Section: Cyanobacteriamentioning

confidence: 99%

Allelopathy of Aquatic Autotrophs

Gross¹

2003

Critical Reviews in Plant Sciences

542

355

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Allelopathy in aquatic environments may provide a competitive advantage to angiosperms, algae, or cyanobacteria in their interaction with other primary producers. Allelopathy can influence the competition between different photoautotrophs for resources and change the succession of species, for exarnple, in phytoplankton cornmunities. Field evidence and laboratory studies indicate that allelopathy occurs in all aquatic habitats (marine and freshwater), and that ail prirnary producing organisms (cyanobacteria, micro-and macroalgae as well as angiospenns) are capable of producing and releasing allelopathically active compounds. Although allelopathy also includes positive (stimulating) interactions, the majority of studies describe the inhibitory activity of ailelopathicaily active compounds. Different mechanisms operate depending on whether allelopathy takes place in the Open water (pelagic zone) or is Substrate associated (benthic habitats). Allelopathical interactions are especiaily common in fully aquatic species, such as submersed macrophytes or benthic algae and cyanobacteria. The prevention of shading by epiphytic and planktonic primary producers and the competition for space may be the ultimate cause for allelopathical interactions. Aquatic ailelochemicals often target multiple physiological processes. The inhibition of photosynthesis of competing primary producers seems tobe a frequent mode of action. Multiple biotic and abiotic factors determine the strength of allelopathic interactions. Bacteria associated with the donor or target organism can metabolize excreted aiielochemicals. Frequently, the impact of surplus or limiting nutrients has been shown to affect the overail production of allelochemicals and their effect on target species. Similarities and differences of ailelopathic interactions in marine and freshwater habitats as well as between the different types of producing organisms are discussed.

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Section: Cyanobacteriamentioning

confidence: 99%

Allelopathy of Aquatic Autotrophs

Gross¹

2003

Critical Reviews in Plant Sciences

542

355

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“…A ce titre, les possibilités de valorisation de cette richesse naturelle apparaissent donc très importantes. De nombreux produits intéressant les industries chimiques, agroalimentaires, pharmaceutiques, cosmétiques et autres peuvent être extraits de bio-masses d'algues (Debro & Ward 1979, Leavitt 1983, Fattom & Shilo 1984, Moulton et al 1987, Borowitzka 1988a, Cannell et al 1988, Schwartz et al 1988, Gromov et al 1991. Par ailleurs, leur composition biochimique, particulièrement intéressante (teneur élevée en protéines, bonne composition en acides gras et acides aminés), en fait une source alimentaire de bonne qualité tant pour les animaux que pour les humains (Becker 1988).…”

Section: Introductionunclassified

Influence de la température, de l'intensité lumineuse et du stade de croissance sur la composition biochimique deChlorella sorokinianaShihira & Krauss

Belkoura¹,

Benider²,

Dauta

1997

Ann. Limnol. - Int. J. Lim.

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Dans une optique de valorisation de l'algue verte Chlorella sorokiniana, la composition biochimique de cette espèce a été déterminée en fonction de la température d'incubation, de l'intensité lumineuse et du stade de croissance. A 35°C, sous un éclairement de 140 uE.nr 2 .s _1 , et en phase exponentielle de croissance, les analyses effectuées ont révélé que la biomasse algale était composée d'environ 40 % de protéines, 30 % de glucides et 18 % de lipides (% de la matière sèche des cellules). Les résultats obtenus ont montré également que les teneurs de ces constituants dépendaient étroitement des conditions de culture. Ainsi, il est possible d'orienter le métabolisme cellulaire de cette espèce vers la production du ou des metabolites souhaités, en choisissant les conditions environnementales appropriées et le moment de la récolte de la biomasse algale. Effects of temperature, light intensity and growth phase on the biochemical composition of Chlorella sorokiniana Shihira & KraussKeywords : Chlorella sorokiniana, proteins, carbohydrates, lipids, environmental factors.In view of the valorization of the green alga Chlorella sorokiniana, the biochemical composition of this species was determined as a function of temperature, light intensity and growth phase. At 35°C, under an irradiancé of 140 nE.m^.s 1 , and at the exponential growth phase, the algal biomass contains about 40 % of proteins, 30 % of carbohydrates and 18 % of lipids (% of cellular dry weight). The relative amounts of these compounds are closely dependent on environmental factors and culture age. So, by selecting the suitable environmental conditions and the harvesting time, it is possible to orient the cellular metabolism to the production of the desirable compounds.

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“…7. possesses algicidal compounds like Crytophycin-A and nestodione-A, hexapeptides, Cyanobacterin LU-1 and LU-2 30 . Compounds isolated from cyanobacteria act on the photosynthetic electron transport chain (ETC), proton coupling, pigment synthesis and photo-oxidative effects and synthesis of amino acids 31 .…”

Section: Gc-ms Analysis Of Nostoc Sp Extractmentioning

confidence: 99%

Untitled

2016

IJPSR

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A freshwater microalga, Nostoc sp. isolated from Tamdil Wetland of Mizoram was tested for its algicidal, antibacterial and antifungal activity. Extracts were prepared with methanol, ethanol:water and dichloromethane:isopropanol and tested for their antimicrobial activity against nine microorganisms comprising of three chlorophycean algae (Chlorella vulgaris, Scenedesmus quadricauda and Selenastrum capricornatum), one cyanobacterium (Anabaena variabilis), three bacterial strains (Bacillus subtilis, Bacillus pumilus and Escherichia coli) and two fungal strains (Fusarium udum and Fusarium culmorum). Among the three extracts tested the methanol extract was found most effective on algal test organisms. The highest (60%) inhibitory effect was observed against A. variabilis by methanol extract followed by 31% inhibition by dichloromethane:isopropanol. When tested on bacterial strains, the highest inhibition zone (23.67±1.58mm) was observed in B. subtilis by dichloromethane:isopropanol extract followed by ethanol:water extract. In case of fungal activity, the highest inhibition zone (11.00±0.58mm) was observed in F. culmorum by dichloromethane:isopropanol extract and the rest of the extracts showed almost similar effect. MICs of each extract on all the organisms varied. The extracts were further analysed by UV-VIS Spectrophotometer, which reveals the presence of active compounds. Among the three extracts, methanol indicated the highest percentage inhibition and also obtained highest absorption spectra. So, this extract was analysed by GC-MS and we identified the presence of main components in the extract as 1,2-Benzenedicarboxylic acid, mono (2-ethylhexyl) ester, Phytol, n-Hexadecanoic acid, 9,12-Octadecadienoic acid, etc. Further study for purification of the potent compound will explain their usefulness in pharmaceutical and biotechnological industry.

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Production of the antibiotic cyanobacterin LU-1 by Nostoc linckia CALU 892 (cyanobacterium)

Cited by 67 publications

References 4 publications

Allelopathy of Aquatic Autotrophs

Allelopathy of Aquatic Autotrophs

Influence de la température, de l'intensité lumineuse et du stade de croissance sur la composition biochimique deChlorella sorokinianaShihira & Krauss

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