Number of the records: 1

Biological dinitrogen fixation by selected soil cyanobacteria as affected by strain origin, morphotype, and light conditions

SYSNO ASEP	0349707
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Biological dinitrogen fixation by selected soil cyanobacteria as affected by strain origin, morphotype, and light conditions
Author(s)	Hrčková, K. (CZ) Šimek, Miloslav (BC-A)_{RID, ORCID} Hrouzek, Pavel (MBU-M)_ORCID Lukešová, Alena (BC-A)_{RID, ORCID}
Source Title	Folia Microbiologica. - : Springer - ISSN 0015-5632 Roč. 55, č. 5 (2010), s. 467-473
Number of pages	7 s.
Language	eng - English
Country	CZ - Czech Republic
Keywords	biological dinitrogen fixation ; soil cyanobacteria ; strain origin
Subject RIV	EH - Ecology, Behaviour
R&D Projects	LC06066 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	IAA600660605 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
CEZ	AV0Z60660521 - UPB-H, BC-A (2005-2011)
	AV0Z50200510 - MBU-M (2005-2011)
UT WOS	000282873200010
DOI	10.1007/s12223-010-0078-6
Annotation	The potential for N₂ fixation by heterocystous cyanobacteria isolated from soils of different geographical areas was determined as nitrogenase activity (NA) using the acetylene reduction assay. Morphology of cyanobacteria had the largest influence on NA determined under light conditions. NA was generally higher in species lacking thick slime sheaths. The highest value (1446 nmol/h C₂H₄ per g fresh biomass) was found in the strain of branched cyanobacterium Hassalia (A Has 1) from the polar region. A quadratic relationship between NA and biomass was detected in the Tolypothrix group under light conditions. The decline of NA in dark relative to light conditions ranged from 37 to 100 % and differed among strains from distinct geographical areas. Unlike the NA of temperate and tropical strains, whose decline in dark relative to light was 24 and 17 %, respectively, the NA of polar strains declined to 1 % in the dark.
Workplace	Biology Centre (since 2006)
Contact	Dana Hypšová, eje@eje.cz, Tel.: 387 775 214
Year of Publishing	2011

Number of the records: 1