ISSN:0027-5514    

DOI:10.1080/00275514.1965.12018188

出版商:Taylor&Francis    

年代:1965

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1965.12018189

出版商:Taylor&Francis    

年代:1965

数据来源: Taylor

摘要:

SUMMARYA spontaneous mutant of the homothallic pyrenomycete,Gelasinospora calospora, which produces small cleistothecial bodies each containing 1–5 asci with viable ascospores, is described. When perithecial and cleistothecial strains are paired, perithecia are formed which yield ascospores that segregate in essentially a 1:1 ratio for the ascocarp characters. The significance of this occurrence, relative to pyrenomycete systematics, is discussed.

ISSN:0027-5514    

DOI:10.1080/00275514.1965.12018190

出版商:Taylor&Francis    

年代:1965

数据来源: Taylor

摘要:

SUMMARYThe endogenous Qo2of mycelium ofPythium aphanidermatumvaried from 35 to 2. Young mycelium had the highest endogenous Qo2values. Starvation of mycelia of different ages reduced the Qo2value to an apparent endpoint value of 2 after 5 days of starvation. Maximum Qo2values, approximating 35, were reached in mycelia grown for short time periods in water extracts of lima beans. The Qo2of young mycelium grown in chemically defined liquid media containing only essential salts and sucrose and N03-N as carbon and nitrogen sources approximated 13. The addition of glucose or sucrose to mycelium held under starvation conditions for 5 days resulted in a 2–3-fold increase in oxygen consumption after 1 hr. Young mycelium with high endogenous respiration rates had the greatest capacity for sporangium and zoospore production.

ISSN:0027-5514    

DOI:10.1080/00275514.1965.12018191

出版商:Taylor&Francis    

年代:1965

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1965.12018192

出版商:Taylor&Francis    

年代:1965

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1965.12018193

出版商:Taylor&Francis    

年代:1965

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1965.12018194

出版商:Taylor&Francis    

年代:1965

数据来源: Taylor

摘要:

SUMMARYAttempts were made with 69 clones ofRhizoctoniafrom 15 U. S. soils to develop the perfect state by transferring the clones from nutritionally rich growth media to nutritionally poor sporulation media. Eight growth media and 5 sporulation media were tested. Vitamins, growth-promoting substances, plant extracts, and several other natural and synthetic compounds added to a synthetic sporulation medium did not induce formation of the perfect state. Only soil extract agar proved to be a successful fruiting medium and that only for 8 clones. The 8 clones were indistinguishable on several media on the basis of cultural characters. On the basis of sexual morphological characters 2 clones were tentatively identified asPellicalaria filamentosa(Rhizoctonia solani) and 3 asP. praticola(R. praticola). The remaining 3 fruiting clones did not belong to either species. Length of sterigmata and number of sterigmata per basidium in the majority of basidia were the only apparent distinguishing characters between wild clones ofR. solaniandR. praticola.However, numbers of sterigmata per basidium in a number of basidia of the 2 species overlapped.Single-basidiospore isolates from both species differed from one another in rate of growth, cultural characters, and development of thick-walled moniliform cells. The asexual characteristics of single-spore isolates of the 2 species completely overlapped. None of the 120 singlespore isolates ofP. filamentosafruited on agar and soil surfaces. Of 60 single-spore isolates ofP. praticolaexamined only 5 produced the perfect state and only on soil extract agar. The majority of basidia of the 5 single-spore isolates developed 3 sterigmata, but these were variable in size and occasionally curved and two-celled. All sterigmata of the single-spore isolates in culture were shorter than those of the wild clones. It is suggested that separation ofR. praticolafromR. solanibe reconsidered.

ISSN:0027-5514    

DOI:10.1080/00275514.1965.12018195

出版商:Taylor&Francis    

年代:1965

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1965.12018196

出版商:Taylor&Francis    

年代:1965

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1965.12018197

出版商:Taylor&Francis    

年代:1965

数据来源: Taylor