| upgrading root physiology for stress tolerance by ectomycorrhizas: insights from metabolite and transcriptional profiling into reprogramming for stress anticipation. | ectomycorrhizas (ems) alleviate stress tolerance of host plants, but the underlying molecular mechanisms are unknown. to elucidate the basis of em-induced physiological changes and their involvement in stress adaptation, we investigated metabolic and transcriptional profiles in em and non-em roots of gray poplar (populus x canescens) in the presence and absence of osmotic stress imposed by excess salinity. colonization with the ectomycorrhizal fungus paxillus involutus increased root cell volume ... | 2009 | 19812185 |
| mycorrhiza formation is not needed for early growth induction and growth-related changes in polyamines in scots pine seedlings in vitro. | ectomycorrhizal (ecm) fungi have been shown to improve growth of the host plant before the formation of physical ecm structures, i.e. during the so-called pre-mycorrhizal phase. in the present study, changes in growth and the concentrations of individual polyamines (pas) were followed during the mycorrhiza formation in scots pine (pinus sylvestris) seedlings in the presence of two ecm fungi, pisolithus tinctorius and paxillus involutus. the two fungus stains were chosen because they differed in ... | 2010 | 20188581 |
| antimicrobial and antioxidant activities of mycelia of 10 wild mushroom species. | antimicrobial and antioxidant activities of mycelia obtained from 10 wild edible mushrooms-armillaria mellea, meripilus giganteus, morchella costata, morchella elata, morchella esculenta var. vulgaris, morchella hortensis, morchella rotunda, paxillus involutus, pleurotus eryngii, and pleurotus ostreatus-were investigated. for determination of antimicrobial activities of these mushrooms, ethanol extracts were examined with 11 test microorganisms by the agar well diffusion method. p. ostreatus and ... | 2010 | 20192845 |
| boron and other elements in sporophores of ectomycorrhizal and saprotrophic fungi. | fungi are usually thought not to have a boron (b) requirement. it is not known if mycorrhizas take up b from low concentrations that are common in forest soils, as fungi might also immobilise b. here, we studied the b concentrations in sporophores of 49 ectomycorrhizal and 10 saprotrophic fungi to assess whether b is translocated in mycelium or not. additionally, p and metal concentrations were measured for comparison. variability both within species and between species was very large, as the lo ... | 2011 | 20526634 |
| surface-bound phosphatase activity in living hyphae of ectomycorrhizal fungi of nothofagus obliqua. | we determined the location and the activity of surface-bound phosphomonoesterase (sbp) of five ectomycorrhizal (em) fungi of nothofagus oblique. em fungal mycelium of paxillus involutus, austropaxillus boletinoides, descolea antartica, cenococcum geophilum and pisolithus tinctorius was grown in media with varying concentrations of dissolved phosphorus. sbp activity was detected at different ph values (3-7) under each growth regimen. sbp activity was assessed using a colorimetric method based on ... | 2004 | 21148871 |
| nitrous oxide production by the ectomycorrhizal fungi paxillus involutus and tylospora fibrillosa. | nitrous oxide (n(2)o) production by filamentous fungi has been demonstrated in pure culture and has been estimated indirectly in soils. however, it is unknown whether ectomycorrhizal fungi can also produce n(2)o. we demonstrate for the first time the ability of nitrogen (n)-tolerant ectomycorrhizal fungi (paxillus involutus and tylospora fibrillosa), found in forest soils under moderate to high rates of n deposition, to produce n(2)o from nitrate reduction. the n(2)o concentrations from the ecto ... | 2011 | 21204923 |
| bioconcentration potential of metallic elements by poison pax (paxillus involutus) mushroom. | bioconcentration potential of ag, al, ba, ca, cd, co, cr, cu, fe, hg, k, mg, mn, na, ni, sr, pb, rb and zn by pioson pax (paxillus involutus) fungus was investigated in field collections of mushrooms from 12 geographically distant sites in poland. caps, stipes and soil (0-15 cm layer) underneath to the fruiting bodies were examined. inductively coupled plasma - atomic emission spectrometry (icp-aes) was used to determine the total metallic elements content. both "labile" (cold 20% hno(3) extract ... | 2011 | 21391032 |
| variations in metal levels accumulated in poison pax (paxillus involutus) mushroom collected at one site over four years. | k, ca, mg, na, zn, al, fe, mn, rb, cu, sr, ag, ba, pb, ni, cd, co, cr and hg content have been examined in caps and stipes of mature fruiting bodies of poison pax (paxillus involutus) collected from the same site over 4 years in 1999-2002. cluster analysis (ca) did indicate on a different composition of these mineral constituents in fruiting bodies that emerged in 1999 and 2000, when compared to 2001 and 2002. in light of principal component analysis (pca), the metals differentiating these two b ... | 2011 | 21500073 |
| basidiomycetous yeasts from boletales fruiting bodies and their interactions with the mycoparasite sepedonium chrysospermum and the host fungus paxillus. | interactions between mushrooms, yeasts, and parasitic fungi are probably common in nature, but are rarely described. bolete fruiting bodies are associated with a broad spectrum of microorganisms including yeasts, and they are commonly infected with filamentous mycoparasites of the genus sepedonium (teleomorph hypomyces). we report the isolation of 17 yeast strains from paxillus and xerocomus, 16 of which were obtained from the surface tissue, the primary site of sepedonium infection. phylogeneti ... | 2011 | 21833540 |
| zn pollution counteracts cd toxicity in metal-tolerant ectomycorrhizal fungi and their host plant, pinus sylvestris. | adaptive zn and cd tolerance have evolved in populations of the ectomycorrhizal fungus suillus luteus. when exposed to high concentrations of both metals in vitro, a one-sided antagonism was apparent in the zn- and cd-tolerant isolates. addition of high zn concentrations restored growth of cd-stressed isolates, but not vice versa. the antagonistic effect was not detected in a s. luteus isolate from non-contaminated land and in paxillus involutus. the fungi were inoculated on pine seedlings and s ... | 2010 | 21966908 |