S. M. Pady

Kansas Aeromycology v: Penicillium and Aspergillus

The genera, Penicillium and Aspergillus, formed two of the more important components of the fungus population of the air at Manhattan Kansas, during a two-year study from September, 1956, through A...

Quantitative Studies of Fungus Spores in the Air

SUMMARYTwo hundred fifty-six silicone treated slides were exposed to the air in a Pady-Rittis sampler between June, 1953, and June, 1955, and the total number of fungus spores, as well as the commo...

Sporobolomycetaceae in Kansas.

Isolations of Sporobolomycetaceae in Kansas from air and leaf surfaces yielded four species of Sporobolomyces, S. pararoseus, S. gracilis, S. alborubescens, and S. odorus; two species of Tilletiopsis, T. washingtonensis and T. minor; and Bullera alba. Sporobolomyces was isolated throughout the year, Tilletiopsis only in the summer, and Bullera in fall, winter, and spring. Optimum temperature for ballistospore production was 16 C.

ASCOSPORE DISCHARGE IN HYPOXYLON

SUMMARY Portions of wood, bearing stromata of three species of Hypoxylon, collected in the field and then maintained in a mist chamber in the greenhouse, were studied under controlled conditions in ISCO Environmental Chambers. Kramer-Collins spore samplers were used to study effects of various environmental factors on ascospore discharge. H. investiens (Schw.) Curt. displayed a light-positive response; spore discharge began within 20-30 min after exposure to light and under constant light was continuous. Under constant dark, spore discharge did not occur. In H. truncatum (Schw. ex Fr.) Miller, spore discharge was inhibited by light of 1,500 ft-c; however, with light less than 500 ft-c, the periodic pattern (with maxima occurring during the dark periods previously established under alternating 8 hr of higher intensity light and 16 hr of dark) was maintained in an endogenous rhythm. When H. rubiginosum Pers. ex Fr. was subjected to alternating 8 hr light and 16 hr dark, spore discharge began to increase while still in the light period and peaked approximately midway through the dark period. After conditioning in alternating light/dark, spore discharge ceased after several days in continuous light; however, under continous dark, it remained relatively constant, showing no indication of a gradual decrease.