Many theories have been proposed to account for the accumulation of citrate in selected strains of Aspergillus niger (Berry et al., 1977). Citrate accumulation was attributed by Ramakrishnan et al. (1955) to loss of aconitase and isocitrate dehydrogenase activity, but the presence of these enzymes was clearly demonstrated by La Nauze (1966). The presence of tricarboxylic acid-cycle enzymes thro...

Abstract The European program ‘Renovation Wave’ aims to fasten the energy retrofit of building stock by increasing a factor 4 current renovation rate. Mycelium-based materials gained momentum as insulation solutions in recent years due their 100% biological composition. However, durability issues, particularly risk fast decay high moisture content, need be investigated promote safe use construc...

In Streptomyces griseus, A-factor (2-isocapryloyl-3R-hydroxymethyl-gamma-butyrolactone) triggers secondary metabolism and morphogenesis by binding a repressor protein (ArpA) and dissociating it from DNA. UV-mutagenesis of the A-factor-deficient mutant HH1 generated strain HO2, defective in the synthesis of ArpA and therefore able to form aerial mycelium, spores and streptomycin. Shotgun cloning...

Mycelial colonies of the developmentally complex actinomycete Streptomyces coelicolor growing on solid medium contain glycogen in two distinct locations. Phase I deposits are found in a substrate mycelium region bordering the developing aerial mycelium. Their production involves GlgBI, one of two glycogen branching enzyme isoforms. Phase II deposits occur in the upper regions of aerial hyphae, ...

Intensive harvesting of forest residues for energy production may lead to the depletion of organic matter and mineral nutrients in the forest floor. In order to restore nutrient content wood ash has been suggested as a fertiliser. Ectomycorrhizal (EM) fungi are involved in the nutrient uptake of forest trees and this study investigates the influence of intensive harvesting and wood ash fertilis...

The sclerotium of Wolfiporia cocos has been used as an edible mushroom and/or a traditional herbal medicine for centuries. W. cocos sclerotial formation is dependent on parasitism of the wood of Pinus species. Currently, the sclerotial development mechanisms of W. cocos remain largely unknown and the lack of pine resources limit the commercial production. The CAZymes (carbohydrate-active enzyme...

The objectives of this 14 days experiment were to investigate the effect of spaceflight on the growth of Ulocladium chartarum, to study the viability of the aerial and submerged mycelium and to put in evidence changes at the cellular level. U. chartarum was chosen for the spaceflight experiment because it is well known to be involved in biodeterioration of organic and inorganic substrates cover...

Brown spot caused by Bipolaris oryzae is an important rice disease in Southern coast of Caspian Sea, the major rice growing region in Iran. A total of 45 Trichoderma isolates were obtained from rice paddy fields in Golestan and Mazandaran provinces which belonged to Trichoderma harzianum, T. virens and T. atroviride species. Initially, they were screened against B. oryzae by antagonism tests in...

The mycelium composites composed of fungal and plant substrate are a practical alternative to petroleum plastic-based foam materials. However, the effects physiological traits fungus on composites’ microscopic structure mechanical properties remain poorly understood. Here, we compared two basidiomycetes with distinct morphology white-decay modes. Cross-sectional observation revealed that posses...