Background:

Bioprospecting includes the search for secondary metabolites to be used as drugs, fungicides or insecticides. Secondary metabolites in plants may vary according to their phenological stage, sex and environment, therefore, these elements should be considered in bioprospecting.

Questions:

1) Are the Baccharis conferta phenophases different between organisms of different sexes and along an altitudinal gradient? and, 2) Do the different concentrations of ethanolic extracts of different sex, phenophases and altitudes of B. conferta on the in vitro growth of Myrothecium roridum and Alternaria solani have biological activity?

Species studied:

Baccharis conferta Kunth, Myrothecium roridum Tode ex Fr. and Alternaria solani Sor.

Study site and dates:

Cofre de Perote National Park, September 2017 to October 2018.

Methods:

Monthly registration of phenophases in plants of both sexes of B. conferta in three altitudes of the Cofre de Perote. In vitro antifungal activity of extracts of B. conferta on Myrothecium roridum and Alternaria solani.

Results:

We observed differences (p < 0.05) in the presence and duration of the B. conferta phenophases between sexes and altitudes. There were also significant differences in extracts from organisms of different altitudes and phenophases on the growth of M. roridum and A. solani.

Conclusions:

The phenophases of Baccharis conferta are different between sexes and through altitude, and its extracts (between sexes and altitude) also have differential effects on in vitro growth of Myrothecium roridum and Alternaria solani.

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