Journal ArticleDOI
Musanolones : four 9-phenylphenalenones from rhizomes of Musa acuminata
Javier G. Luis,Winston Quiñones,Fernando Echeverri,Teresa A. Grillo,Martha P. Kishi,Francisco Garcia-Garcia,Fernando Torres,Gloria Cardona +7 more
TLDR
Four new phenalenone-type phytoalexins, named musanolones C-F, have been isolated from infected rhizomes of banana plants (Musa acuminata; AAA cultivar Grand Nain) and elucidated using spectroscopic data and chemical correlations.About:
This article is published in Phytochemistry.The article was published on 1996-02-01. It has received 44 citations till now. The article focuses on the topics: Fusarium oxysporum & Fusarium oxysporum f.sp. cubense.read more
Citations
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Book ChapterDOI
Biaryls in nature: a multi-facetted class of stereochemically, biosynthetically, and pharmacologically intriguing secondary metabolites.
Journal ArticleDOI
Light- and singlet oxygen-mediated antifungal activity of phenylphenalenone phytoalexins.
Alejandra Lazzaro,Montserrat Corominas,Cristina Martí,Cristina Flors,Laura R. Izquierdo,Teresa A. Grillo,Javier G. Luis,Santi Nonell +7 more
TL;DR: The light-induced singlet oxygen production and antifungal activity of phenylphenalenone phytoalexins isolated from infected banana plants are reported and the correlation of IC50 values under illumination with the quantum yield of singletoxy production and the enhancing effect of D2O on the antifundal activity are suggested.
Journal ArticleDOI
Phenylphenalenone-type Phytoalexins from Unripe Buñgulan Banana Fruit.
TL;DR: An antifungal test on the phytoalexins showed that a phenolic hydroxyl group was essential for the activity.
Journal ArticleDOI
Synthesis and Antifungal Activity of Musa Phytoalexins and Structural Analogs
Winston Quiñones,Gustavo Escobar,Fernando Echeverri,Fernando Torres,Yoni Rosero,Víctor Arango,Gloria Cardona,Adriana M. Gallego +7 more
TL;DR: Several perinaphthenone/phenylphenalenone compounds were synthesized to publish a relationship between structure and antifungal activity against Mycosphaerella fijiensis and determine the relationship between phytoalexin structure and their antif fungus effects.
Journal ArticleDOI
Phototoxic phytoalexins. Processes that compete with the photosensitized production of singlet oxygen by 9-phenylphenalenones.
Cristina Flors,Peter R. Ogilby,Javier G. Luis,Teresa A. Grillo,Laura R. Izquierdo,Pier-Luigi Gentili,Laura Bussotti,Santi Nonell +7 more
TL;DR: Evidence of an intramolecular charge-transfer process in the excited singlet and the triplet states of 9-phenylphenalenones that modulates the photosensitized production of singlet oxygen is provided.
References
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Journal ArticleDOI
Irenolone and emenolone: two new types of phytoalexin from Musa paradisiaca
Javier G. Luis,Fernando Echeverri,Winston Quiñones,Iván Brito,Matias Lopez,Fernando Torres,Gloria Cardona,Zahira E. Aguiar,Carlos Peláez,Mauricio Rojas +9 more
TL;DR: Phenalenone-type phytoalexins were obtained for the first time from bananas and identified by COSY 1 H-1 H, HMQC and HMBC techniques, and X-ray analysis, among other methods as discussed by the authors.
Journal ArticleDOI
Mode of Pisatin Induction: Increased Template Activity and Dye-binding Capacity of Chromatin Isolated from Polypeptide-treated Pea Pods.
TL;DR: The DNA-complexing properties of inducer compounds and the induced changes in the template and dye-binding properties of pea chromatin formed the basis for a proposed mode of action for phytoalexin induction.
Journal ArticleDOI
Phenalenone-type phytoalexins from Musa acuminata. Synthesis of 4-phenyl-phenalenones
TL;DR: In this paper, two 4-phenyl-phenalenone-type phytoalexins (2, 3 ) have been isolated from rhizomes of Musa acuminata infected with the fungus Fusarium oxysporum.
Journal ArticleDOI
Structure and function of complex carbohydrates active in regulating plant-microbe interactions
Peter Albersheim,A. G. Darvill,Michael R. McNeil,Barbara Valent,Michael G. Hahn,Gary D. Lyon,J K Sharp,A. E. Desjardins,Michael W. Spellman,L. M. Ross,B. K. Robertson,Per Åman,Lars-Erik Franzén +12 more
TL;DR: Current knowledge of the structures of these biologically active complex carbohydrates will be presented.
Journal ArticleDOI
Intermediates with biosynthetic implications in de novo production of phenyl-phenalenone-type phytoalexins by Musa acuminata. Revised structure of emenolone
Javier G. Luis,Winston Q. Fletcher,Fernando Echeverri,Teresa A. Grillo,Aurea Perales,JoséA. González +5 more
TL;DR: In this paper, the structures of the new prephytoalexins were elucidated on the basis of spectroscopic evidences, chemical correlation and acid catalyzed biomimetic cyclization of 1 to emenolone (4), isolated from the same source and whose previously reported structure has been unambiguously corrected by X-ray diffraction analysis.