Topic
Arabitol
About: Arabitol is a research topic. Over the lifetime, 388 publications have been published within this topic receiving 8398 citations. The topic is also known as: D-(+)-Arabitol & D-arabitol.
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TL;DR: Growth and metabolite formation of P. anomala was analyzed under two conditions of oxygen limitation: initial aerobic conditions with restricted oxygen access during the growth period and initial microaerobic conditions followed by anaerobiosis.
Abstract: The biocontrol yeast Pichia anomala J121 prevents mould growth during the storage of moist grain under low oxygen/high carbon dioxide conditions. Growth and metabolite formation of P. anomala was analyzed under two conditions of oxygen limitation: (a) initial aerobic conditions with restricted oxygen access during the growth period and (b) initial microaerobic conditions followed by anaerobiosis. Major intra- and extracellular metabolites were analyzed by high-resolution magic-angle spinning (HR-MAS) NMR and HPLC, respectively. HR-MAS NMR allows the analysis of major soluble compounds inside intact cells, without the need for an extraction step. Biomass production was higher in treatment (a), whereas the specific ethanol production rate during growth on glucose was similar in both treatments. This implies that oxygen availability affected the respiration and not the fermentation of the yeast. Following glucose depletion, ethanol was oxidized to acetate in treatment (a), but continued to be produced in (b). Arabitol accumulated in the culture substrate of both treatments, whereas glycerol only accumulated in treatment (b). Trehalose, arabitol, and glycerol accumulated inside the cells in both treatments. The levels of these metabolites were generally significantly higher in treatment (b) than in (a), indicating their importance for P. anomala during severe oxygen limitation/anaerobic conditions.
36 citations
TL;DR: It is suggested that glucitol and ribitol may be intermediates (or by-products) of glucose utilization, whereas mannitol, arabitol and trehalose represent storage carbohydrates.
Abstract: SUMMARY: An examination of the soluble carbohydrates of the wheat stem rust fungus, Puccinia graminis Pers. f. sp. tritici Erikss. & E. Henn., showed the presence of glucitol (sorbitol), ribitol, fructose, and traces of xylitol, as well as confirming the presence of mannitol, arabitol, trehalose, inositol and erythritol. Ribitol and glucitol were major components in glucose-grown mycelium, and appeared to be the major components in mycelium parasitic on wheat leaves, but not in germinated or ungerminated uredospores. It is suggested that glucitol and ribitol may be intermediates (or by-products) of glucose utilization, whereas mannitol, arabitol and trehalose represent storage carbohydrates.
36 citations
TL;DR: It appears that trehalose is the major form by which carbohydrate is translocated in Serpula lacrimans mycelial regions.
Abstract: Trehalose and arabitol are the most abundant carbohydrates in mycelium of Serpula lacrimans growing over Perspex. Trehalose is the major soluble carbohydrate in strands while arabitol reaches high levels in more marginal regions. Uptake of [14C]glucose results in the bulk of label being found in trehalose in all mycelial regions. It appears that trehalose is the major form by which carbohydrate is translocated.
36 citations
TL;DR: It is identified that arabitol is the primary compatible solute in S. nodorum but in-built levels of redundancy are present allowing the fungus to tolerate osmotic stress.
35 citations
TL;DR: Glycerol and arabitol were the main solutes accumulated by C. sake cells in response to lowered a(w), and intracellular concentration of these polyols depended more on the solute used to adjust the a-w than on the a(W) itself.
Abstract: The biocontrol agent Candida sake was cultured on either an unmodified molasses-based medium (water activity, aw 0.996) or on water stressed media produced by the addition of glycerol, glucose, NaCl, sorbitol, or proline to 0.98, and 0.96 aw for 24, 48, and 72 h, to study their impact on subsequent cell viability, and on concentrations of endogenous sugars (trehalose and glucose) and polyols (glycerol, erythritol, arabitol, and mannitol). The viability of cells of different ages cultured on these media was evaluated on NYDA medium with freely available water (aw 0.995), and on medium modified with polyethylene glycol to aw 0.95. Regardless of solute used, viable counts of cells grown on molasses-based medium (aw 0.98) were equal to or higher than those obtained from the medium with water freely available. The amino acid proline stimulated growth at 10% concentration. In contrast, water stress induced by addition of NaCl, glucose, or sorbitol at aw 0.96 caused a significant reduction in viable counts. Olde...
34 citations