摘要:

SUMMARYA striking variant has been produced by cultivation of monoploid hyphae ofHypomyces Ipomoeaeon medium containing a sub-lethal concentration of zinc nitrate.Analyses of 5 consecutive single-conidium culture-series, consisting of 25 cultures each, have proved the mutant strain,aborta, to be homocaryotic. Single-conidium and mass-transfer cultures of theabortastrain have shown a high degree of uniformity.The most striking feature associated with the variant was that four, rather than eight, spores were formed inaborta×normalasci, due apparently to inability of nuclei carrying theabortafactors to delimit spores.Evidence strongly indicated that in rare instances ascospores inaborta×normalasci may include more than one of the eight nuclei resulting from maturation of the zygote nucleus. Thus, in two instances, single ascospores isolated from hybrid perithecia yielded mixed cultures containing bothnormalandabortahyphae. The two fxabortastrains thus obtained bore opposite sexual-reaction factors. In two other instances, single ascospores from hybrid perithecia yielded cultures containingnormalhyphae of both sexual reactions, as was evidenced by the appearance of fertile perithecia in both cultures.The inability ofabortanuclei to delimit ascospores may be attributed to the inactivation or to the deletion of one or more genes determining ascospore delimitation. The ascospore-delimitation factors and the sexual-reaction factors are in different linkage groups.The genie alteration or mutation, although having occurred on medium containing a sub-lethal concentration of zinc, cannot be considered a specific effect of zinc ion without further evidence.

ISSN:0027-5514    

DOI:10.1080/00275514.1937.12017200

出版商:Taylor&Francis    

年代:1937

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1937.12017201

出版商:Taylor&Francis    

年代:1937

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1937.12017202

出版商:Taylor&Francis    

年代:1937

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1937.12017203

出版商:Taylor&Francis    

年代:1937

数据来源: Taylor

摘要:

SUMMARY1.Monascus rubervan Tieghem is reported found at the Botanical Museum of Harvard University growing on a specimen of smoked crude rubber ofHevea brasiliensisattacked by an undetermined species of mite.2.BothMonascus rubervan Tieghem andMonascus purpureusWent grew well on the nutriment offered them by the crude rubber apart from any material furnished by the mites.3.Crude rubbers from various plants served to varying degrees as utilizable media for growth of both species ofMonascus.4.Monascus ruberdeveloped somewhat better thanMonascus purpureuson unvulcanized samples of commercial rubber: pale crêpe, smoked sheet, and latex-sprayed rubber. Pale crêpe is the least suitable of these as a nutrient substratum. The smoked condition of the smoked sheet seemed to hinder but little the support of the fungi. No growth of either species was produced on the vulcanized samples.5.Pure rubber hydrocarbon representing the sol-rubber portion of the hydrocarbon constituent supported growths of both species ofMonascus.6.Synthetic rubber, a polymer of chloroprene, was not utilizable as a substrate by eitherMonascus ruberorMonascus purpureus.7.Monascus, a cosmopolitan genus found on a variety of substrata may become an important member of the group of fungi attacking rubber.

ISSN:0027-5514    

DOI:10.1080/00275514.1937.12017204

出版商:Taylor&Francis    

年代:1937

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1937.12017205

出版商:Taylor&Francis    

年代:1937

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1937.12017206

出版商:Taylor&Francis    

年代:1937

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1937.12017207

出版商:Taylor&Francis    

年代:1937

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1937.12017208

出版商:Taylor&Francis    

年代:1937

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1937.12017209

出版商:Taylor&Francis    

年代:1937

数据来源: Taylor