Influence of Growth Temperature on Lipid and Soluble Carbohydrate Synthesis by Fungi Isolated from Fellfield Soil in the Maritime Antarctic

Weinstein, Richard N.; Montiel, Pedro O.; Johnstone, Keith

doi:10.2307/3761554

Cited by 62 publications

(32 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Trehalose, a cryoprotective carbohydrate commonly found in polar biota (Montiel 1998, Weinstein et al 2000, was detected in all three species, despite not being detected in these species in a previous study from the same region . This compound is common in many organisms capable of withstanding near-complete desiccation, including cyanobacteria, fungi, yeast, arthropods and plant seeds, as it is very effective at stabilizing proteins and other macromolecules during dehydration (Crowe et al 1992).…”

Section: Biochemical Factors Which Could Aid Desiccation Tolerancecontrasting

confidence: 62%

Some like it wet — biological characteristics underpinning tolerance of extreme water stress events in Antarctic bryophytes

Wasley

Robinson

Lovelock

et al. 2006

Functional Plant Biol.

View full text Add to dashboard Cite

Antarctic bryophyte communities presently tolerate physiological extremes in water availability, surviving both desiccation and submergence events. This study investigated the relative ability of three Antarctic moss species to tolerate physiological extremes in water availability and identified physiological, morphological, and biochemical characteristics that assist species performance under such conditions. Tolerance of desiccation and submergence was investigated using chlorophyll fluorescence during a series of field-and laboratorybased water stress events. Turf water retention and degree of natural habitat submergence were determined from gametophyte shoot size and density and ?13C signatures respectively. Finally, compounds likely to assist membrane structure and function during desiccation events (fatty acids and soluble carbohydrates) were determined. The results of this study show significant differences in the performance of the three study species under contrasting water stress events. The results indicate that the three study species occupy distinctly different ecological niches with respect to water relations and provide a physiological explanation for present species distributions. The poor tolerance of submergence seen in Ceratodon purpureus helps explain its restriction to drier sites and conversely, the low tolerance of desiccation and high tolerance of submergence displayed by the endemic Grimmia antarctici is consistent with its restriction to wet habitats. Finally the flexible response observed for Bryum pseudotriquetrum is consistent with its co-occurrence with the other two species across the bryophyte habitat spectrum. The likely effects of future climate change induced shifts in water availability are discussed with respect to future community dynamics.

show abstract

Section: Biochemical Factors Which Could Aid Desiccation Tolerancecontrasting

confidence: 62%

Some like it wet — biological characteristics underpinning tolerance of extreme water stress events in Antarctic bryophytes

Wasley

Robinson

Lovelock

et al. 2006

Functional Plant Biol.

View full text Add to dashboard Cite

show abstract

“…It is noteworthy that a similar induction of trehalose and glycogen was observed at temperatures above the optimum. An accumulation of cryoprotective carbohydrates in response to suboptimal growth temperature was observed in Humicola marvinii and Mortierella elongata, described from fell-field soils in maritime Antarctica (Weinstein et al 2000) and in yeast strains (Schade et al 2004).…”

Section: Discussionmentioning

confidence: 99%

Comparison of the oxidative stress response of two Antarctic fungi to different growth temperatures

Kostadinova¹,

Tosi²,

Spassova³

et al. 2017

Polish Polar Research

View full text Add to dashboard Cite

Two fungal strains, isolated from Livingston Island, Antarctica (Penicillium commune 161, psychrotolerant and Aspergillus glaucus 363, mesophilic) were investigated for a relationship between growth temperature and oxidative stress response. Cultivation at temperatures below -(10 and 15°C and 10 and 20°C for P. commune and A. glaucus, respectively) and above (25°C and 30°C for P. commune and A. glaucus, respectively) the optimum caused significant difference in growth and glucose uptake in comparison with the control cultures. Enhanced level of reserve carbohydrates (glycogen and trehalose) was determined under cultivation at different temperatures from the optimal one. While the highest content of trehalose was found in the exponential phase, glycogen accumulation was observed in the stationary phase when growth conditions deteriorate. The growth at temperature below-and above-optimum caused strain-dependent changes in two antioxidant enzymes superoxide dismutase (SOD) and catalase (CAT). While SOD activity in the psychrotolerant strain increases with decreasing of growth temperature, the mesophilic A. glaucus demonstrated marked reduction of it at below-and above-optimal temperature. Decreasing trend of CAT activity was observed in both strains below the optimal temperature indicating a lack of antioxidant protection from this enzyme under the cold stress conditions.

show abstract

“…Thus, using strains capable of growing in the non-detoxified hydrolysate is necessary for viable microbial lipid production in an industrial context. In addition, previous reports indicate that temperature is an key factor in regulating the fatty acid composition in fungi (Kendrick and Ratledge 1992;Weinstein, Montiel et al 2000). Similarly, some oleaginous filamentous fungi can also produce lipids by utilizing glycerol, acetic acid, soluble starch, wheat straw, and wheat bran.…”

Section: Yeast and Fungimentioning

confidence: 97%

Microbial Biodiesel Production - Oil Feedstocks Produced from Microbial Cell Cultivations

Zhang¹,

Hu²

2011

Biodiesel - Feedstocks and Processing Technologies

View full text Add to dashboard Cite

Influence of Growth Temperature on Lipid and Soluble Carbohydrate Synthesis by Fungi Isolated from Fellfield Soil in the Maritime Antarctic

Cited by 62 publications

References 38 publications

Some like it wet — biological characteristics underpinning tolerance of extreme water stress events in Antarctic bryophytes

Some like it wet — biological characteristics underpinning tolerance of extreme water stress events in Antarctic bryophytes

Comparison of the oxidative stress response of two Antarctic fungi to different growth temperatures

Microbial Biodiesel Production - Oil Feedstocks Produced from Microbial Cell Cultivations

Contact Info

Product

Resources

About