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1.
Thelephantins D-H: five p-terphenyl derivatives from the inedible mushroom Thelephora aurantiotincta
Ngoc Quang D Hashimoto T Hitaka Y Tanaka M Nukada M Yamamoto I Asakawa Y 《Phytochemistry》2003,63(8):919-924
Five p-terphenyl derivatives named thelephantins D-H (1-5) together with nine known compounds, thelephantins A-C (6-8), ganbajunin E (9), p-hydroxylbenzoic acid (10), ganbajunin C (11), thelephorin A (12), 2-O-methylatromentin (13) and atromentin (14), were isolated from the methanolic extract of fruit bodies of the Thelephoraceous Basidiomycete Thelephora aurantiotincta. Their structures were elucidated by high-resolution MS, 2D NMR, IR and UV spectroscopic analysis. 相似文献
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Quang DN Hashimoto T Nukada M Yamamoto I Hitaka Y Tanaka M Asakawa Y 《Phytochemistry》2003,62(1):109-113
Three benzoyl p-terphenyl derivatives named thelephantins A, B and C were isolated from the ethyl acetate extract of fruit bodies of the Thelephoraceous Basidiomycete Thelephora aurantiotincta. Their structures were elucidated by analysis of high-resolution 2D NMR, MS, IR and UV spectra. 相似文献
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The processes of symbiotic germination and seedling development were analysed in the myco-heterotrophic orchid Corallorhiza trifida , seeds of which were buried in 'packets' either adjacent to or at varying distances from adult plants in defined communities of ectomycorrhizal tree species. Germination occurred within eight months of burial under Betula – Alnus and within seven months under Salix repens . It was always associated with penetration of the suspensor by a clamp-forming mycorrhizal fungus. Four distinct developmental stages were defined and the rates of transition through these stages were plotted. There was no evidence of a relationship between extent of germination or rate of development and the presence of naturally distributed plants of C. trifida at the spatial scale of 1 m. The best germination and the most rapid rate of development of C. trifida seedlings occurred in a Salix repens community located at a considerable distance from any extant C. trifida population. Determination of internal transcribed spacer (ITS) RFLPs and of gene sequences of the fungi involved in symbiotic germination and growth of C. trifida , revealed them to belong exclusively to the Thelephora – Tomentella complex of the Thelephoraceae. These fungi are known also to be ectomycorrhizal associates of trees. It is hypothesized that the rate of growth of the C. trifida seedlings is determined by the ability of the fungal symbionts to transfer carbon from their ectomycorrhizal co-associates. 相似文献
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The hypothesis that biosynthesis of the xylerythrin-type pigments occurs via a pulvinic acid intermediate was confirmed by controlled biological experiments. 相似文献
6.
Friedrich von Massow 《Phytochemistry》1977,16(11):1695-1698
Culture experiments with the fungus Peniophora sanguinea showed that the xylerythrin-type pigments of this organism are bio-synthesized via a pulvinic acid intermediate. 相似文献
7.
Asymbiotic seedling propagation and introduction of seedlings into a natural habitat were achieved for Cephalanthera falcata. For immature seeds collected 65 days after pollination, high germination rate (av. 50%) was achieved on Hyponex agar medium
plates. Root development occurred in about 10% of the protocorms 5 months after seed sowing. Rooted protocorms were transferred
to a culture bottle containing 100 ml of the Hyponex agar medium and incubated continually. In about 30% of the transferred
individuals, shoot height reached 1.5–2 cm 8 months after the transfer. After acclimatization in wet vermiculite at 4°C for
6 months, 135 individuals were planted in a natural stand of C. falcata in mid February 2001. Shoot appearance rate was 44.4% at the first year and flowering was noted in some plants. At the fifth
year, shoots with an average height of 21.6 cm still appeared in four plants, and flowering was noted in three of them. Colonization
of mycorrhizal fungi was examined in two of them as well as one wild plant, in which the mycorrhizal fungi were identified
to be in Thelephoraceae or Russulaceae. These fungi are known to form ectomycorrhiza with trees, and thus a tripartnership
symbiosis consisting of C. falcata, mycorrhizal fungi and trees was suggested. The involvement of ectomycorrhizal fungi might be the reason for the low survival
rate in the field experiment, because the distribution of ectomycorrhizal fungi relevant to this orchid is assumed to be uneven.
The possibility of introducing artificially propagated orchids into natural habitats was discussed. 相似文献
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* Three members of the Nyctaginaceae, two Neea species and one Guapira species, occurred scattered within a very species-rich neotropical mountain rain forest. The three species were found to form ectomycorrhizas of very distinctive characters, while all other tree species examined formed arbuscular mycorrhizas. * The ectomycorrhizas were structurally typified according to light and transmission electron microscope investigations. The internal transcribed spacer (ITS) rDNA and part of the nuclear large subunit (LSU, 28S) rDNA of the mycorrhiza forming fungi were amplified and sequenced. Phylogenetic analyses were carried out. * Neea species 1 was found to form typical ectomycorrhizas with five different fungal species, Russula puiggarii, Lactarius sp., two Tomentella or Thelephora species, and one ascomycete. Neea species 2 and the Guapira species were associated with only one fungus each, a Tomentella/Thelephora species clustering closely together in an ITS-neighbour-joining tree. The long and fine rootlets of the Guapira species showed proximally a hyphal mantle and a Hartig net, but distally intracellular fungal colonization of the epidermis and root hair development. The ectomycorrhizal segments of the long roots of Neea species 2 displayed a hyphal mantle and a Hartig net around alive root-hair-like outgrowths of the epidermal cells. * The distribution and the evolution of ectomycorrhizas in the predominantly neotropic Nyctaginaceae are discussed. 相似文献
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Thelephantins I-N; p-terphenyl derivatives from the inedible mushroom Hydnellum caeruleum 总被引:1,自引:0,他引:1
Quang DN Hashimoto T Hitaka Y Tanaka M Nukada M Yamamoto I Asakawa Y 《Phytochemistry》2004,65(8):1179-1184
Phytochemical investigation of the methanolic extract of the fruiting bodies of the inedible mushroom Hydnellum caeruleum resulted in the isolation of six p-terphenyl derivatives named thelephantins I-N (1-6), together with a known compound, dihydroaurantiacin dibenzoate (7). These structures were determined by high-resolution MS, 2D NMR, IR and UV spectroscopic analysis, and by the chemical reactions. 相似文献
10.
Seven p-terphenyl derivatives named terrestrins A-G together with three known ganbajunin B, thelephantins F and H, were isolated from the methanol extract of fruiting bodies of the Japanese inedible mushroom Thelephora terrestris (Thelephoraceae). Their structures were elucidated by means of high-resolution MS, 2D NMR, IR and UV spectroscopy, and X-ray crystallographic analysis. 相似文献