Repellent Activity of Estrogenic Compounds toward Zoospores of the Phytopathogenic Fungus Aphanomyces cochlioides

@article{Islam2001RepellentAO,
  title={Repellent Activity of Estrogenic Compounds toward Zoospores of the Phytopathogenic Fungus Aphanomyces cochlioides},
  author={M. Tofazzal Islam and Satoshi Tahara},
  journal={Zeitschrift f{\"u}r Naturforschung C},
  year={2001},
  volume={56},
  pages={253 - 261}
}
  • M. Islam, S. Tahara
  • Published 1 April 2001
  • Biology, Chemistry
  • Zeitschrift für Naturforschung C
Abstract Screening chemical compounds, we found that a xenoestrogen, bisphenol A , showed potent repellent activity against the zoospores of A phanomyces 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 zoospores. Interestingly, most of the estrogenic compounds exhibited potent repellent… 

Figures and Tables from this paper

Variation in Chemotactic Preferences of Aphanomyces cochlioides Zoospores to Flavonoids

  • M. Islam
  • Biology, Chemistry
    Zeitschrift fur Naturforschung. C, Journal of biosciences
  • 2009
TLDR
Surprisingly, zoospores were attracted by non-estrogenic 6-prenylated naringenin indicating that repellent activity is linked to the estrogenic activity of the phytoestrogens.

Zoosporicidal activity of polyflavonoid tannin identified in Lannea coromandelica stem bark against phytopathogenic oomycete Aphanomyces cochlioides.

TLDR
The first report of zoosporicidal activity of natural polyflavonoid tannins against an oomycete phytopathogen is reported, which merits further study as potential zoospore regulating agent or as lead compound.

Secondary Metabolites from Nonhost Plants Affect the Motility and Viability of Phytopathogenic Aphanomyces cochlioides Zoospores

  • Tofazzal Islam
  • Chemistry, Medicine
    Zeitschrift fur Naturforschung. C, Journal of biosciences
  • 2008
TLDR
The results suggest that nonhost plants might possess potential bioactive secondary metabolites to ward off zoosporic phytopathogens.

Host-specific plant signal and G-protein activator, mastoparan, trigger differentiation of zoospores of the phytopathogenic oomycete Aphanomyces cochlioides

TLDR
The results suggest that G-protein mediated signal transduction mechanism may be involved in the differentiation of the A. cochlioides zoospores and that chemicals interfering with phospholipase C activity and Ca2+ influx/release suppress cochliophilin A or mastoparan induced encystment and germination.

Chemotaxis of Fungal Zoospores, with Special Reference to Aphanomyces cochlioides

TLDR
It is hypothesized that zoospores perceive the host signal(s) by specific G-protein-coupled receptors and translate it into responses by way of the phosphoinositide-Ca2+ signaling cascade, which guides the pest propagules for orientation and prepares them for establishing a host-pathogen relationship by necessary physiological changes.

Antagonistic rhizoplane bacteria induce diverse morphological alterations in Peronosporomycete hyphae during in vitro interaction

TLDR
It is suggested that antagonistic rhizoplane bacteria have the capability to induce diverse morphological alterations in Peronosporomycetes hyphae during in vitro interactions.

Microscopic Studies on Attachment and Differentiation of Zoospores of the Phytopathogenic Fungus Aphanomyces cochlioides

TLDR
Two contrasting phenomena suggest that A. cochlioides zoospores may use their posterior flagella for successful docking on the host surface or for aggregation of encysting spores in the absence of the host.

A Journey of Twenty-Five Years through the Ecological Biochemistry of Flavonoids

  • S. Tahara
  • Biology, Medicine
    Bioscience, biotechnology, and biochemistry
  • 2007
The ecological biochemistry of flavonoids, in which I have been engaged for 25 years, is summarized in this review article. The review covers (1) a survey of rare bio-active flavonoids in higher

Chemotaxis of Fungal Zoospores , with to Aphanomyces cochlioides SpecialReference

TLDR
The signaling and communications of phytopathogenic fungal zoospores and host and non-host plants with special referenee to Aphanonryces cochlioides is re-sighted.

References

SHOWING 1-10 OF 35 REFERENCES

Fatty acids, aldehydes and alcohols as attractants for zoospores of Phytophthora palmivora

TLDR
The existence of further attractants for fungal zoospores is reported, and the possibility that they may be of significance in chemotaxis to plant roots is considered.

Biotransformation of testosterone and pregnenolone catalyzed by the fungus Botrytis cinerea.

TLDR
Testosterone and pregnenolone, a precursor of many steroidal hormones, were oxidized by fermentation with the fungus Botrytis cinerea and the metabolites are characterized by detailed physical and spectroscopic studies.

Bisphenol-A: an estrogenic substance is released from polycarbonate flasks during autoclaving.

TLDR
The findings raise the possibility that unsuspected estrogenic activity in the form of BPA may have an impact on experiments employing media autoclaved in polycarbonate flasks, and it remains to be determined whether BPA derived from consumer products manufactured from poly carbonate could significantly contribute to the pool of estrogenic substances in the environment.

The xenoestrogen bisphenol A induces growth, differentiation, and c-fos gene expression in the female reproductive tract.

TLDR
The studies demonstrate that the molecular and morphological alterations induced by BPA in the uterus and vagina are nearly identical to those induced by estradiol; the vagina appears to be especially sensitive to the estrogenic actions of BPA.

Chemotaxis of Zoospores for Root Exudates

TLDR
A chemotactic response of the zoospores of a soil-inhabiting plant pathogenic fungus for roots of avocado seedlings was observed, and interesting implications are evident with regard to mechanisms of invasion and pathogenicity, and to disease resistance.