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Interactions between steroids in the growth of Phytophthora

1969; Wiley; Volume: 20; Issue: 7 Linguagem: Inglês

10.1002/jsfa.2740200708

1097-0010

C.G. Elliott, B.A. Knights,

Potato Plant Research

Abstract It is shown that several steroids in mixture with cholesterol inhibit the cholesterol‐dependent oospore production by Phytophthora cactorum in culture. It is suggested that in plants, precursors of the phytosterols might compete with sterols to reduce the sporulation of pathogens, such as Phytophthora and Pythium spp., which are dependent on the r hosts for the sterols required for their reproduction. A high proportion of precursor compared with sterol would thus enhance the disease resistance of the host.