The influence of sterols on meiosis in Phytophthora cactorum.

@article{Elliott1977TheIO,
  title={The influence of sterols on meiosis in Phytophthora cactorum.},
  author={Charles G. Elliott and Eva Richardson Sansome},
  journal={Journal of general microbiology},
  year={1977},
  volume={98 1},
  pages={
          141-5
        }
}
SUMMARY: Abortion of oogonia of Phytophthora cactorum grown on media containing cholestanol occurs at or just before early meiotic prophase. Meiosis is possibly controlled by a steroid hormone, for which cholesterol is an effective precursor but cholestanol is not. 
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Production of the inducing α2 hormone by the A2 strain does not appear to require sterol, but sterol greatly enhances the response to the inducing hormone byThe A1 strain as well as being required for subsequent oospore development.
Sterol Requirement of Mating Strains of Heterothallic Phytophthoras
TLDR
Production of the inducing a 2 hormone by the A2 strain does not appear to require sterol, but sterol greatly enhances the response to the inducing hormone byThe A1 strain as well as being required for subsequent oospore development.
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Isolates of Phytophthora infestans of A1 mating type from central Mexico and Wales, when mated to a range of A2 isolates from Russian and Mexico, produced a proportion of abnormal oogonia with…
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A series of 20(R)-n-alkylpregn-5-en-3β-ols with 0 to 9 (but not with 12) C-atoms in the alkyl group induced formation of oogonia inPhytophthora cactorum. However, maturation of the oogonia into…
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When cultures ofPhytophthora cactorum grown on sterol-free medium were supplemented with a mixture of cholesterol and sitosterol, the sitosterol was initially taken up more rapidly than the…
STEROIDAL OESTROGENS AND PLANT GROWTH AND DEVELOPMENT
TLDR
The current information regarding the occurrence of steroidal oestrogens and the physiological significance of these compounds in plants is reviewed and results are presented from experiments with Pisum and Phaseolus seedlings.
Effect of 6-substituted sterols on sterol-induced reproduction inPhytophthora cactorum
TLDR
The results indicate the importance of C-6 as a point of interaction with cellular sites controlling oospore formation in Phytophthoras or Pythiums examined hitherto in forming numberous oospores with cholestanol.
Sexual reproduction in the Peronosporomycetes (chromistan fungi)
TLDR
The cellular reorganization occurring in the oogonium and oospores, particularly in relation to the possible functions of the dense body vesicle system and the glucan, phosphate, and lipid oospore reserves, may be critical for the internal morphology of the mature Oospore and its function.
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References

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Labelling and trapping studies with a series of hypothetic sterol precursors have indicated the biological sequence involved in elaboration of the antheridiol side chain in the aquatic fungus Achlya bisexualis.
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TLDR
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