Cell wall polymers in Archaea (Archaebacteria)

Kandler, Otto; König, Helmut

doi:10.1007/s000180050156

Cited by 171 publications

(101 citation statements)

References 11 publications

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“…We hypothesized that AOA may be less sensitive to Cu addition as archaea are reported to tolerate extreme conditions. Typically, archaeal membranes are less permeable to ions than bacterial membranes because of the chemical structure of their membrane lipids (Kandle and König 1998). This characteristic may provide archaea with the ability to survive under stress (e.g.…”

Section: Discussionmentioning

confidence: 99%

Do ammonia-oxidizing archaea respond to soil Cu contamination similarly asammonia-oxidizing bacteria?

Zhu

Cavagnaro

et al. 2009

Plant Soil

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Inhibitory experiments were conducted to investigate the responses of the population sizes of ammonia-oxidizing archaea (AOA) and bacteria (AOB) and the potential nitrification rates (PNRs) to Cu contamination in four Chinese soils. PNR was determined using a substrate-induced nitrification (SIN) assay, and the population size of the nitrifiers represented by amoA gene abundances was quantified using a real-time polymerase chain reaction (qPCR) assay. Both population size and PNR of the ammonia oxidizers reduced considerably at high Cu concentrations in all the soils. Bacterial amoA gene abundance was reduced by from 107-fold (Hailun soil) to more than 232-fold (Hangzhou soil) at the highest Cu concentrations (2,400 mg kg −1 Cu for Hailun, Langfang and Guangzhou soils and 1,600 mg kgCu for Hangzhou soil), while reduction in archaeal amoA gene abundance was from 10-fold (Langfang soil) to 89-fold (Hangzhou soil). AOA seemed more tolerant to Cu contamination than AOB. Nitrification rates were inhibited by more than 50% at a Cu concentration of 600 mg kg −1 , and by more than 90%at the highest Cu concentrations in all soils. These results indicated that both AOA and AOB can be inhibited by toxic metals, highlighting the need to consider the role of AOA in nitrification in soils.

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Section: Discussionmentioning

confidence: 99%

Do ammonia-oxidizing archaea respond to soil Cu contamination similarly asammonia-oxidizing bacteria?

Zhu

Cavagnaro

et al. 2009

Plant Soil

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“…Halococcal cells resist lysis when suspended in low-osmolarity solutions (3.5 % NaCl) (Mani et al 2012;Legat et al 2013). The cell wall of Halococcus is composed of heteropolysaccharide with acetylated amino sugars unlike glycoprotein S-layer in genus Haloferax (Schleifer et al 1982;Kandler and Konig 1998). This could be a contributing factor for higher metal resistance of these organisms.…”

Section: Effect Of Zn and Zno Nps On Growth Of Halophilic Archaeamentioning

confidence: 99%

Resistance of extremely halophilic archaea to zinc and zinc oxide nanoparticles

2015

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Industrialization as well as other anthropogenic activities have resulted in addition of high loads of metal and/or metal nanoparticles to the environment. In this study, the effect of one of the widely used heavy metal, zinc (Zn) and zinc oxide nanoparticles (ZnO NPs) on extremely halophilic archaea was evaluated. One representative member from four genera namely Halococcus, Haloferax, Halorubrum and Haloarcula of the family Halobacteriaceae was taken as the model organism. All the haloarchaeal genera investigated were resistant to both ZnCl 2 and ZnO NPs at varying concentrations. Halococcus strain BK6 and Haloferax strain BBK2 showed the highest resistance in complex/minimal medium of up to 2.0/1.0 mM ZnCl 2 and 2.0/1.0-0.5 mM ZnO NP. Accumulation of ZnCl 2 /ZnO NPs was seen as Haloferax strain BBK2 (287.2/549.6 mg g -1 ) [ Halococcus strain BK6 (165.9/388.5 mg g -1 ) [ Haloarcula strain BS2 (93.2/28.5 mg g -1 ) [ Halorubrum strain BS17 (29.9/16.2 mg g -1 ). Scanning electron microscopy and energy dispersive X-ray spectroscopy (SEM-EDX) analysis revealed that bulk ZnCl 2 was sorbed at a higher concentration (21.77 %) on the cell surface of Haloferax strain BBK2 as compared to the ZnO NPs (14.89 %).

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“…This may have been because archaeal membranes are typically less permeable to ions than bacterial membranes (Kandler and König, 1998). This distinction makes archaea more tolerant to stress than bacteria (Valentine, 2007).…”

Section: Discussionmentioning

confidence: 99%

Limitation of spatial distribution of ammonia-oxidizing microorganisms in the Haihe River, China, by heavy metals

Chao

Shan

Zhang

et al. 2014

Journal of Environmental Sciences

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a b s t r a c tThe Haihe River is characterized by high ammonia pollution. Therefore, it is necessary to determine how environmental factors, such as heavy metals in the river limit the spatial distribution of ammonia-oxidizing microorganisms. In this study, the relationships between five heavy metals and ammonia-oxidizing microorganisms were studied. The results showed that under high ammonia, low oxygen and high concentrations of suspended particles, ammonia-oxidizing bacteria (AOB) ranged from 10 1.3 to 10 4.8 gene copies/mL and ammonia-oxidizing archaea (AOA) ranged from 10 2.7 to 10 4.9 gene copies/mL. The average metal concentrations in water were 23.57 (Cr), 21.58 (Ni), 65.09 (Cu), 622.03 (Zn) and 10.16 (As) μg/L, with those of Zn, Cu and Cr being higher than the US EPA criteria. Scatter plots of microbial abundance and metals indicated that both AOA and AOB were limited by heavy metals, but in different ways. As had an inhibitory effect on AOB, while Ni and Zn promoted AOA, and the other metals investigated showed no significant correlation with microbial abundance. Overall, our results indicated that the effects of heavy metals on ammonia-oxidizing microorganisms in water are complex, and that the final effect is determined by the physiological role of each element in the microorganisms, as well as environmental conditions such as complexation of organic matter, not simply the total metal concentration.

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Cell wall polymers in Archaea (Archaebacteria)

Cited by 171 publications

References 11 publications

Do ammonia-oxidizing archaea respond to soil Cu contamination similarly asammonia-oxidizing bacteria?

Do ammonia-oxidizing archaea respond to soil Cu contamination similarly asammonia-oxidizing bacteria?

Resistance of extremely halophilic archaea to zinc and zinc oxide nanoparticles

Limitation of spatial distribution of ammonia-oxidizing microorganisms in the Haihe River, China, by heavy metals

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