The occurrence of sesquiterpenes was investigated with the geosmin-producing cyanobacterium Calothrix PCC 7507. The essential oil obtained by vacuum destillation was studied in more detail by GC-MS methods and superposition with authentic compounds. Geosmin was the dominating compound while the other sesquiterpenes were minor components. Sesquiterpenes that have not been described before in cya...

Dehydrins are a family of desiccation proteins that were identified originally in plants (T.J. Close, A.A. Kortt, P.M. Chandler [1989] Plant Mol Biol 13: 95-108; G. Galau, T.J. Close [1992] Plant Physiol 98: 1523-1525). Dehydrins are characterized by the consensus amino acid sequence domain EKKGIMDKIKEKLPG found at or near the carboxy terminus; the core of this domain (KIKEKLPG) may be repeated...

a r t i c l e i n f o Considering the important role of N 2 fixation for primary productivity and CO 2 sequestration, it is crucial to assess the response of diazotrophs to ocean acidification. Previous studies on the genus Trichodesmium suggested a strong sensitivity towards ocean acidification. In view of the large functional diversity in N 2 fixers, the objective of this study was to improve...

Windblown and water-induced erosion cause substantial soil losses worldwide, especially for drylands. Any sustainable management program that increases organic matter improves the stability of crustal layer could considerably enhance productivity preservation erosion-prone land. This paper presents a laboratory investigation cyanobacteria-inoculated medium sand fine soils studied severe runoff ...

A Lagoa Salgada é um corpo aquático hipersalino costeiro localizado no norte do Estado Rio de Janeiro e reconhecido pela presença estromatólitos. As cianobactérias são os principais produtores primários dessas estruturas em lagoas hipersalinas costeiras. O objetivo estudo foi identificar as presentes na por meio da metagenômica. material genético obtido uma amostra água coletada mês junho 2019 ...

We amplified, TA-cloned, and sequenced the 16S-23S internal transcribed spacer (ITS) regions from single isolates of several cyanobacterial species, Calothrix parietina, Scytonema hyalinum, Coelodesmium wrangelii, Tolypothrix distorta, and a putative new genus (isolates SRS6 and SRS70), to investigate the potential of this DNA sequence for phylogenetic and population genetic studies. All isolat...

Calcium sensitive actin severing protein, adseverin, with Mr 74,000, was cleaved into two fragments of Mr 42,000 and Mr 39,000 by V8 protease and trypsin, and both fragments were purified by high performance (pressure) liquid chromatography ion-exchange column chromatography. To understand how adseverin can sever actin filaments, we identified the actin-binding domains. The NH2 termini of nativ...

Biofertilizers containing living organisms are attractive because of their potential positive impact on plant growth and reduced environmental effect compared to mineral fertilizers. Many studies have reported the growth-promoting rhizobacteria (PGPR) cyanobacteria, applied singly or in combination. In present study, combined PGPR cyanobacteria Triticum aestivum L. was examined a hydroponic sys...