Biological activities of ophiobolin K and 6-epi-ophiobolin K produced by the endophytic fungus Aspergillus calidoustus.

Endophytic fungi represent ubiquitous microbial organisms able to live in the tissues of different plants around the world and represent a prolific source of bioactive metabolites. In the present study, the endophytic fungus Aspergillus calidoustus was isolated from the medicinal plant Acanthospermum australe (Asteraceae), and identified using molecular, physiological and morphological methods. A methylene chloride crude extract of A.

Endophytic fungi community associated with the dicotyledonous plant Colobanthus quitensis (Kunth) Bartl. (Caryophyllaceae) in Antarctica.

This work describes the distribution and diversity of fungal endophytes associated with leaves of Colobanthus quitensis, a dicotyledonous plant that lives in Antarctica. A total of 188 fungal isolates were obtained from six different sites located across a 25.5-km transect through Admiralty Bay, at King George Island.