Abstract
Claviceps purpurea and single isolates of Epichloë amaryllans and E. baconii grew well between –0.3 and –3.0 MPa water potential, below which growth declined with declining water potential. The isolates of E. clarkii and of E. typhina were less tolerant to reduced water potential. Antibiotic was weakly produced by some Epichloü isolates but not by C. purpurea.
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