scispace - formally typeset
Search or ask a question
Journal ArticleDOI

Nudol, a phenanthrene of the orchids Eulophia nuda, Eria carinata and Eria stricta

01 Jan 1985-Phytochemistry (Pergamon)-Vol. 24, Iss: 4, pp 801-804
TL;DR: An amorphous phenanthrene, named nudol has been isolated from Eulophia nuda, Eria carinata and E. stricta and was identified as 2,7-dihydroxy-3,4-dimethoxyphenanthrene.
About: This article is published in Phytochemistry.The article was published on 1985-01-01. It has received 74 citations till now. The article focuses on the topics: Eria.
Citations
More filters
Journal ArticleDOI
TL;DR: The present study reviews the traditional therapeutic uses of orchidaceous preparations with its recent advances in pharmacological investigations that would be a useful reference for plant drug researches, especially in orchids.

287 citations

Journal ArticleDOI
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.

282 citations

Journal ArticleDOI
TL;DR: Root amendments had a greater impact over time on phenanthrene degraders than heterotrophs resulting in selective maintenance of degrader populations in amended soils compared with controls.
Abstract: To investigate the mechanisms by which slender oat (Avena barbata Pott ex Link) enhances phenanthrene biodegradation, we analyzed the impacts of root exudates and root debris on phenanthrene biodegradation and degrader community dynamics. Accelerated phenanthrene biodegradation rates occurred in soils amended with slender oat root exudates as well as combined root debris + root exudate as compared with unamended controls. Root exudates significantly enhanced phenanthrene biodegradation in rhizosphere soils, either by increasing contaminant bioavailability and/or increasing microbial population size and activity. A modified most probable number (MPN) method was used to determine quantitative shifts in heterotrophic and phenanthrene degrader communities. During the first 4 to 6 d of treatment, heterotrophic populations increased in all amended soils. Both root debris-amended and exudate-amended soil then maintained larger phenanthrene degrader populations than in control soils later in the experiment after much of the phenanthrene had been utilized. Thus, root amendments had a greater impact over time on phenanthrene degraders than heterotrophs resulting in selective maintenance of degrader populations in amended soils compared with controls.

184 citations


Cites background from "Nudol, a phenanthrene of the orchid..."

  • ...…study investigated hybrid poplar- 1994) and phenanthrene derivatives such as retene and enhanced atrazine biodegradation in soil microcosms nudol (Bhandari et al., 1985) are aliphatic and aromatic and found that the addition of root exudates caused a hydrocarbons that occur naturally in plant…...

    [...]

Journal ArticleDOI
TL;DR: Two new phenanthrenes (4,9-dimethoxyphenanthrene-2,5-diol and 4,6-dimethyltoxymethylhexane-1,3,7-triol) and two new 9,10-dihydrophenanthreness (4methoxy-9, 10-dibenzyls and the triterpenoid friedelin were isolated and characterized from the hexane extract of the orchid Bulbophyllum vaginatum) were determined by spectroscopic analyses

94 citations

Journal ArticleDOI
TL;DR: Compounds 1-3 and denthyrsinin (1,5,7-trimethoxyphenanthrene-2,6-diol; 4) showed significant cytotoxic activities against Hela (13.5, 9.5 and 4.8 microM, respectively) cell lines.

79 citations

References
More filters
Journal ArticleDOI
TL;DR: In this article, the 13 C NMR spectra of 15 neolignans of several structural types and two lignans were analyzed and their carbon shifts assigned, and the shifts of pyrogallol ether and ethyl phenyl carbinyl ether models were used in this connection.

96 citations

Journal ArticleDOI
TL;DR: 2,7-Dihydroxy-4-methoxy-9,10-dihydrophenanthrene was isolated and identified from the whole plant of Coelogyne ochracea and C. elata.

77 citations

Journal ArticleDOI
TL;DR: Two new modified 9, 10-dihydrophenanthrenes of the orchids Pholidota articulata, Otochilus porecta and O. fusca have been established and NMR spectral analysis of isoflavidinin acetate confirmed its structure.

33 citations

Journal ArticleDOI
TL;DR: In this paper, a new phenolic compound isolated from the Himalayan orchid Coelogyne elata was shown to be 2,7-dihydroxy-9,10-Dihydro-5H-phenanthro[4,5-bcd]pyran-5-one (2d) by spectral and chemical evidence.

24 citations