Phytotoxicity and ultrastructural effects of gymnopusin from the orchid Maxillaria densa on duckweed (Lemna pausicostata) frond and root tissues.
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Both phenanthrene derivatives exhibited moderate cytotoxicity to all mammalian cells tested, which precludes their use as a bioherbicide.About:
This article is published in Phytochemistry.The article was published on 2002-09-01 and is currently open access. It has received 20 citations till now. The article focuses on the topics: Gymnopusin & Lemna.read more
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Journal ArticleDOI
Natural phenanthrenes and their biological activity.
TL;DR: The present study furnishes an overview of the hydroxy or/and methoxy-substituted 9,10-dihydro/phenanthrene, methylated, prenylated and other monomeric derivatives, dimeric and trimeric phenanthrenes and their biological activities.
Book ChapterDOI
Stilbenoids: Chemistry and bioactivities
TL;DR: Stilbenoids are formed by a particular branch of the flavonoid biosynthetic pathway and are of special interest to natural product researchers for their roles in plant resistance to fungal pathogens and their biological effects as discussed by the authors.
Journal ArticleDOI
Antinociceptive and anti-inflammatory effects of compounds isolated from Scaphyglottis livida and Maxillaria densa
TL;DR: The results tend to support the popular use of this species in folk medicine for treatment of painful complaints and their pharmacological effect could be partially due to activation of opioid receptors.
Journal ArticleDOI
Phytotoxic activity of bibenzyl derivatives from the orchid Epidendrum rigidum.
Yanet Hernández-Romero,Laura Acevedo,María de los Ángeles Alcántara Sánchez,W. Thomas Shier,Hamed K. Abbas,Rachel Mata +5 more
TL;DR: The results suggest that orchid bibenzyls may be good lead compounds for the development of novel herbicidal agents and showed marginal cytotoxicity on animal cells.
Journal ArticleDOI
Anti-inflammatory, antioxidant, anti-cholinesterase activity and mutagenicity of South African medicinal orchids
TL;DR: The results obtained in this study validate the use of certain orchid species in South African traditional medicine for inflammation-related degenerative disorders and selective inhibition of cyclooxygenase enzymes, antioxidant and anti-cholinesterase activities of selected South African orchid extracts.
References
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A method for the extraction of chlorophyll from leaf tissue without maceration
J. D. Hiscox,G. F. Israelstam +1 more
TL;DR: A simple, rapid method requiring few manipulations for the extraction of chlorophylls from fragmented leaf tissue of angiosperms and gymnosperms is compared with the widely used acetone method, which makes use of incubation at 65 °C of leaf tissue immersed in dimethyl sulphoxide.
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Fumonisin- and AAL-Toxin-Induced Disruption of Sphingolipid Metabolism with Accumulation of Free Sphingoid Bases
Hamed K. Abbas,Tatsumi Tanaka,Stephen O. Duke,James K. Porter,E. M. Wray,L. Hodges,A. E. Sessions,E. Wang,A. H. Merrill,Ronald T. Riley +9 more
TL;DR: In plants the disease symptoms associated with A. alternata and F. moniliforme infection may be due to disruption of sphingolipid metabolism, which suggests that the primary biochemical lesion is inhibition of de novo ceramide synthesis and reacylation of free sphingoid bases.
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Toxicity of the mycotoxins fumonisins B1 and B2 and Alternaria alternata f. sp. lycopersici toxin (AAL) in cultured mammalian cells
TL;DR: Studies in co-cultures of sensitive and insensitive cell lines and in cultures of a sensitive cell line over a range of cell densities indicated that cytotoxicity of fumonisins B1 and B2 does not involve metabolite activation to a derivative stable enough to diffuse to adjacent cells.
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Structure-dependent phytotoxicity of fumonisins and related compounds in a duckweed bioassay
TL;DR: In a duckweed bioassay, AAL-toxin and the B series fumonisins at 1,μM caused pronounced cellular leakage of electrolytes and photodegradation of chlorophylls, and these four compounds also caused the most marked reductions in duckweed growth.
Journal ArticleDOI
Biological activities of synthetic analogues of Alternaria alternata toxin (AAL-toxin) and fumonisin in plant and mammalian cell cultures
H K Abbas,T Tanaka,W. T. Shier +2 more
TL;DR: Among the substances tested, only analogue 9 had significant phytotoxicity and low mammalian toxicity, indicating some potential for development of safe and effective natural herbicides.