Temperature induced changes in the heterocyst glycolipid composition of N2 fixing heterocystous cyanobacteria
Access Status
Authors
Date
2014Type
Metadata
Show full item recordCitation
Source Title
ISSN
Collection
Abstract
We investigated the effect of temperature on the heterocyst glycolipid (HG) composition of the diazotrophic heterocystous cyanobacteria Anabaena sp. strain CCY9613 and Nostoc sp. strain CCY9926 grown at 9, 12, 16, 20 and 24 °C. Both strains contained an overall similar composition of heterocyst glycolipids, with 1-(O-hexose)-3,25-hexacosanediols (HG26 diols) and 1-(O-hexose)-3-keto-25-hexacosanols (HG26 keto-ols) dominating minor quantities of 1-(O-hexose)-3,27-octacosanediols (HG28 diols) and 1-(O-hexose)-3-keto-27-octacosanols (HG28 keto-ols). The relative proportion of HG diols vs. HG keto-ols increased with increasing growth temperature, which was quantitatively expressed as HGI26 (heterocyst glycolipid index of 26 carbons). Values of the index decreased from 0.30 to 0.12 in Nostoc CCY9926 and from 0.18 to 0.10 in Anabaena CCY9613 over the temperature interval investigated. Likewise, HGI28 (heterocyst glycolipid index of 28 carbons) values decreased from 0.33 to 0.10 in Nostoc CC9926 and from 0.12 to 0.07 in Anabaena CCY9613 with increasing temperature. Our results thus provide the first evidence that changes in the composition of the heterocyst cell envelope as a function of temperature occur systematically in different heterocystous cyanobacteria and may constitute a mechanism for allowing optimum N2 fixation by regulating the rate of gas diffusion into the heterocyst.
Related items
Showing items related by title, author, creator and subject.
-
Bauersachs, T.; Rochelmeier, J.; Schwark, Lorenz (2015)It has been demonstrated that the relative distribution of heterocyst glycolipids (HGs) in cultures of N2-fixing heterocystous cyanobacteria is largely controlled by growth temperature, suggesting a potential use of these ...
-
Bauersachs, T.; Mudimu, O.; Schulz, R.; Schwark, Lorenz (2014)N2-fixing heterocystous cyanobacteria have been shown to hold a suite of unique glycolipids, so-called heterocyst glycolipids (HGs), as part of the heterocyst cell envelope. It was also demonstrated that the distribution ...
-
Lengger, Sabine; Hopmans, E.; Reichart, G.; Nierop, K.; Damste, J.; Schouten, S. (2012)The TEX86 is a proxy based on a ratio of pelagic archaeal glycerol dibiphytanyl glycerol tetraether lipids (GDGTs), and used for estimating past sea water temperatures. Concerns exist that in situ production of GDGTs ...