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STUDIES ON MUCORALEAN MYCOPARASITES
Author(s) -
EVANS G. H.,
LEWIS D. H.,
COOKE R. C.
Publication year - 1978
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1978.tb01636.x
Subject(s) - hypha , yeast , germination , biology , spore , botany , spore germination , ascomycota , microbiology and biotechnology , host (biology) , sporogenesis , microspora , germ tube , ecology , biochemistry , stamen , pollen , microspore , gene
SUMMARY At 15°C, axenically germinated spores of Mycotypha microspora gave rise to transient yeast‐phase growth before the establishment of hyphal development. At this temperature, germination in the presence of spores of Piptocephalis fimbriata resulted in the persistence of the yeast‐phase, few hyphae being formed. Where hyphae were produced these either reverted to the yeast‐phase, became severely attenuated, gave rise to dwarf sporophores or died. Such mycoparasite‐mediated effects did not occur at 20°C. When Mortierella vinacea was used as a host in similar experiments there was no yeast‐phase growth but severe stunting of hyphae occurred initially, followed by recovery and normal growth. Using Circinella mucoroides , there was again no yeast‐phase but there was massive death of host hyphae without any apparent disturbances to their morphology. These observations are discussed in relation to the physiological and ecological consequences of mycoparasitism.