Attractants of Aphanomyces cochlioides zoospores contained in sugar beet seedlings.
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چکیده
منابع مشابه
Variation in chemotactic preferences of Aphanomyces cochlioides zoospores to flavonoids.
The zoospores of the phytopathogenic Aphanomyces cochlioides are chemotactically attracted by a host-specific flavone, cochliophilin A (5-hydroxy-6,7-methylenedioxyflavone), and repelled from the mammalian estrogens or estrogenic compounds. This study further examined the responses of A. cochlioides zoospores to some flavonoids structurally related to cochliophilin A or compounds known as phyto...
متن کاملRepellent activity of estrogenic compounds toward zoospores of the phytopathogenic fungus Aphanomyces cochlioides.
Screening chemical compounds, we found that a xenoestrogen, bisphenol A, showed potent repellent activity against the zoospores of Aphanomyces cochlioides. Based on this finding, we tested a number of androgenic and estrogenic compounds (e.g. testosterone, progesterone, estradiols, diethylstilbestrol, estrone, estriol, pregnenolone, dienestrol etc.) on the motility behavior of A. cochlioides zo...
متن کاملNicotinamide and structurally related compounds show halting activity against zoospores of the phytopathogenic fungus Aphanomyces cochlioides.
In a survey of plant secondary metabolites regulating the behavior of phytopathogenic Aphanomyces cochlioides zoospores, we found that leaf extracts of Amaranthus gangeticus and cotyledon extracts of pea (Pisum sativum) remarkably halted the motility of zoospores. Bioassay-directed fractionation of A. gangeticus and pea constituents revealed that the halting activity was dependent on a single c...
متن کاملSecondary metabolites from nonhost plants affect the motility and viability of phytopathogenic Aphanomyces cochlioides zoospores.
The motile zoospores of the damping-off pathogen Aphanomyces cochlioides aggregate on host plants (e.g., sugar beet, spinach) guided by the host-specific plant signal cochliophilin A before infection. To assess the potential role of secondary metabolites in nonhost resistance, acetone extracts of 200 nonhost traditional medicinal plants from Chinese and Bangladeshi origins were tested for the m...
متن کاملProduction of protease isozymes by Aphanomyces cochlioides and Aphanomyces euteiches
The production of protease activity by the sugarbeet pathogen Aphanomyces cochlioides, the legume pathogen A. euteiches, and the fish pathogen Saprolegnia parasitica was examined. Protease activity was readily detected in supernatants of water cultures of each organism using autoclaved host tissue as a nutrient source. Most of the protease isozymes extracted from sugarbeet and pea seedlings inf...
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ژورنال
عنوان ژورنال: Japanese Journal of Phytopathology
سال: 1988
ISSN: 1882-0484,0031-9473
DOI: 10.3186/jjphytopath.54.133