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Studies on the Germination of the Spores of Certain Basidiomycetae

1934; University of Chicago Press; Volume: 96; Issue: 2 Linguagem: Inglês

10.1086/334471

1940-1205

Fred H. O. Kaufmann,

Plant Pathogens and Fungal Diseases

As a result of these researches, and granted the conditions of this investigation, the following conclusions seem justified. 1. Three culture solutions in which a high percentage of the spores of Coprinus micaceus and of C. comatus will germinate are beef broth, 4 per cent sucrose, and 0.5 per cent glycerin. 2. With the exception of the spores of the species of Coprinus, the hydrogen-ion range in which the germination of the spores of the Agaricaceae and Nidulariaceae will occur is between pH 5.0 and 8.5. The spores of C. comatus germinate over a range of from pH 3.0 to 10.0, and those of C. micaceus over a range of from pH 3.5 to 10.0. 3. The general optimum pH for germination of the spores of the Agaricaceae and of the Nidulariaceae is pH 7.5. 4. The effect of the hydrogen ions and of the hydroxyl ions upon the germination of the spores of the Agaricaceae and the Nidulariaceae varies with the species. 5. The optimum hydrogen-ion concentration for germ tube development is slightly below the hydrogen-ion concentration optimum for germination. 6. The general optimum temperature for the germination of the spores of the Agaricaceae and of the Nidulariaceae is 30⚬ C. 7. The widest temperature range under which germination will occur is from 15⚬ to 45⚬ C. for the spores of Coprinus micaceus and of C. comatus. The general range is from 20⚬ to 40⚬ C. for the spores of the other species of Agaricaceae and Nidulariaceae. 8. Up to the time of this writing, efforts at germinating the spores of Bovistella radicata and of Calvatia cyathiformis in artificial media have been unsuccessful. 9. In this investigation, the germination percentages of the spores of Coprinus comatus are higher than all other results thus far reported for this species. 10. This is the first definite investigation reported of the germination of the spores of four of the species used, namely, Lepiota cepaestipes, Armillaria mellea, Cyathus olla, and Cyathus striatus.