Shunxing Guo

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A dark-septate endophytic (DSE) fungus EF-M was isolated from the roots of an alpine plant Saussurea involucrata Kar. et Kir. ex Maxim. The fungus was identified by sequencing the PCR-amplified rDNA 5.8S gene and ITS regions. The sequence was compared with similar sequences in the GenBank, and results showed that EF-M was congeneric to Leptodontidium.(More)
2-(2-Phenylethyl) chromones and a 2-(2-phenylethenyl) chromone, were isolated from the ethanolic extract of Chinese eaglewood. Their structures were determined on the basis of extensive analyses of spectroscopic data. Among those, one showed significant neuroprotective activities against both glutamate-induced and corticosterone-induced neurotoxicity in P12(More)
A study on the chemical constituents of the endophytic fungus Preussia sp. led to the isolation of three new spirobisnaphthalene analogues, spiropreussione A (1), spiropreussione B (2), and spiropreussomerin A (3). Compound 2 is a spirobisnaphthalene analogue with a cyclopenteno-naphthoindene fragment bridged to a 1,8-dioxygenated naphthalene fragment, and(More)
Dendrobium is a large genus of tropical epiphytic orchids. Some members of this genus are in danger of extinction across China. To investigate orchid mycorrhizal associations of the genus Dendrobium, plants from two Dendrobium species (Dendrobium officinale and Dendrobium fimbriatum) were collected from two habitats in Guangxi Province, China, and clone(More)
An endophytic fungus, F-23, was isolated from the roots of Dendrobium officinale Kimura et Migo, an endangered Chinese medicinal plant. The sequence of the ITS region indicated that the isolate belongs to the genus Mycena. After 4 months of inoculation, the root systems of D. officinale that were inoculated with F-23 fungus were much larger than the(More)
It is attractive to pharmaceutical works to seek useful material from endophytic fungi. Spiropreussione A (SA) which is isolated from endophytic fungus Preussia sp. is a novel anti-tumor product. Since previous preparation method cannot provide enough SA, and considering the large volume of broth and low concentration of the target product, macroporous(More)
Saussurea involucrata (Kar. et Kir.) Sch. Bip. (family Asteraceae) is a rare traditional Chinese medicinal herb. A new guaianolide, 11 beta,13-dihydrodehydrocostuslactone-8-O-[6'-O-acetyl-beta-D-glucoside] (1), together with two known guaianolides, namely 11 beta,13-dihydrodehydrocostuslactone-8-O-beta-D-glucoside (2) and 3 alpha-hydroxyl-11(More)
Agilawood is a rare and valuable traditional medicine used worldwide since ancient times. However, its formation in the tree Aquilaria sinensis under natural conditions takes a long time. Fungi with high levels of bioactivity for triggering agilawood formation could enable the establishment of plantations of A. sinensis for improved production of this(More)
Three new dihydrophenanthrofurans, pleionesins A-C (1-3), together with two known dihydrophenanthrenes (4-5) were isolated from the tubers of Pleione yunnanensis (Rolfe). The complete (1)H and (13)C NMR spectra assignments of these compounds were carried out using 1D and 2D NMR experiments ((1)H, (13)C, selective 1D NOE, HSQC and HMBC).
This study investigated the taxonomic identities and diversity of fungal endophytes isolated from four Rhizophoraceae mangrove plant species, Ceriops tagal, Rhizophora apiculata, R. stylosa and Bruguiera sexangula var. rhynchopetala, using a combination of morphological and molecular approaches. Two hundred ninety-five isolates were classified into 38 taxa(More)