The main compound present in the organic extract was identified by spectroscopic and X‐ray analyses as 7‐hydroxytropolone (7HT). Its structure and tautomerism was confirmed by preparing the two key derivatives 2,3‐dimethoxy‐ and 2,7‐dimethoxy‐tropone. 7HT, but not 2,3‐ or 2,7‐...
The stoichiometry of 7-hydroxytropolone ferric complex was determined to be 2:1 by the continuous variation method. The production of 7-hydroxytropolone was repressible by iron in the medium. Moreover, the inhibited growth of doubly siderophore-deficient strain of P. donghuensis under iron-...
Pseudomonas donghuensis HYS; HemN2; 7-hydroxytropolone; GacS; oxidative stress1. Introduction Pseudomonas is a gram-negative bacterium that is widespread in nature. This genus contains many pathogen species, including P. aeruginosa, P. putida, P. fluorescens, and P. syringae [1,2,3]. P. ...
ChemInform Abstract: 7-HYDROXY-6H-BENZO(3,4)CYCLOBUTA(1,2)CYCLOHEPTEN-6-ONE. A TROPOLONE CONDENSED WITH AN ANTI-AROMATIC FOUR-MEMBERED RINGfused phenylcycloalkyl derivatives (rings with 3, 4, 7 or more members)doi:10.1002/chin.197811169...
sp7-Hydroxy Tropolone, Bacterial Constituents, Pseudomonas sp. Structure elucidation and antibiotic activity of 7-hydroxy tropolone -a metabolite from Pseudomonas sp. — is reported.doi:10.1515/znc-1981-9-1006Korth, HPulverer, GRömer, ABudzikiewicz, H...
elegans. HemN2 was negatively regulated by the Gac system and regulated bacterial virulence via 7-hydroxytropolone (7-HT) synthesis and redox levels. Our findings revealed the key role of HemN2 in bacterial virulence, which may help us to better understand the strong pathogen...
We further correlated the biological activity against Dickeya solani of extracted CFS-PA14H7 to the presence of 7-hydroxytropolone (7-HT) complexed with iron. In a second time, we have synthesized this molecule and determined accurately using LC-UV, LC-MS, and GC-MS ...
7-hydroxytropolone; iron-complex; Pseudomonas; Dickeya; Pectobacteriaceae; biocontrol; blackleg; soft rot; potato Graphical Abstract1. Introduction Cultivated worldwide, the potato crop is sensitive to a large panel of pests and diseases. Among these, blackleg, also named soft rot when affecting...
An iron fist in a velvet glove: The cooperation of a novel pyoverdine from Pseudomonas donghuensisP482 with 7‐hydroxytropolone is pivotal for its antibacterial activitydoi:10.1111/1462-2920.16559Jafra, SylwiaJabońska, MagdalenaMacig, Tomasz
1959. Toxicity tests of a new tropolone, B-thujaplicinol, occurring in western red cedar. Can. J. Bot. 37:1132.Roff JW , Whittaker El. 1959 . Toxicity tests of a new tropolone, β-thujaplicinol (7-hydroxy-4-isopropyl tropolone) occurring in Western red cedar . Canadian Journal of ...