ISSN:0027-5514    

DOI:10.1080/00275514.1935.12017058

出版商:Taylor&Francis    

年代:1935

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1935.12017059

出版商:Taylor&Francis    

年代:1935

数据来源: Taylor

摘要:

SUMMARYTHE Cytology of the four species here studied,Exidia glandulosa(Bull.) Fries,E. recisaDitm.,E. saccharinaFries, andE. nucleata(Schw.) Burt, is remarkably uniform in all particulars.Between the usually binucleate segments of the hyphae fusions frequently occur. Clamp connections are abundant, also.Over the upper surface of the fruit-body the young hypobasidia, each binucleate, develop. In these, nuclei unite to form the fusion nucleus. As this enlarges, very definite organization is visible, the chromatin being clearly aggregated in eight linear patches, the prochromosomes, which contract to form the eight small chromosomes.The first nuclear division in the basidium is the reduction division, which is followed by a second homotypic division. Subsequent to this division, the minute nuclei migrate through the epibasidia into the spore. Contrary to Neuhoff's report, the nucleus becomes definitely elongated during migration.Nuclear division accompanies spore germination inExidia.This is in contrast to the situation inTremella, where no nuclear division occurs in the usual method of spore germination.The formation of a layer of thick-walled interlacing hyphae over the surface of the drying fruit-body is characteristic of species ofExidia.This feature does not occur in species ofTremella.

ISSN:0027-5514    

DOI:10.1080/00275514.1935.12017060

出版商:Taylor&Francis    

年代:1935

数据来源: Taylor

摘要:

SUMMARYThis study deals with the morphology of the sooty blotch fungus ofTrifolium, which has a conidial stage, a spermogonial stage, and a perithecial stage in its cycle of development.The undulate character of the conidiophores is the result of sympodial branching. Each conidiophore produces a series of conidia. After each conidium is delimited the conidiophore elongates.The spermogonia and perithecial fundaments are formed co- incidentally within the same stroma, sometimes in separate stromata, in autumn. Each is locular.The spermogonial stage functions in the production of spermatia that apparently are essential to the subsequent development of the perithecia.The perithecial stage matures in spring within locules of a dothidiaceous stroma.The evidence in hand indicates that all parts of the fungus are pigmented with some tint or shade of brown.Several names have been applied to each of the stages in the developmental cycle of the organism. It is herein regarded as the type of a new genus and is given the nameCymadothea Trifolii(Pers.).

ISSN:0027-5514    

DOI:10.1080/00275514.1935.12017061

出版商:Taylor&Francis    

年代:1935

数据来源: Taylor

摘要:

SUMMARYFrom the present study of the fungi, variously known asFusisporium albumDesm.,Helostroma album(Desm.) Pat.,Articularia quercina(Peck) von Höhnel,Articulariella aurantiaca(Ellis&Martin) von Höhnel,Ascomycetella quercinaPeck,A. aurantiacaEllis&Martin,Microstroma alba(Desm.) Sacc., it is believed thatArticulariella aurantiaca(Ellis&Martin) von Höhnel is synonymous withFusisporium albumDesm.,Helostroma album(Desm.) Pat. andMicrostroma album(Desm.) Sacc., but thatArticularia quercina(Peck) von Höhnel is another fungus described as the conidial stage of Peck'sAscomycetella quercina, and in general, the fungus present on pecans.Because of the difference in the size of the fungus on oak and the one on pecan, it seems best to consider the form on pecan a variety and designate itArticularia quercina(Peck) von Höhnel var.minor.

ISSN:0027-5514    

DOI:10.1080/00275514.1935.12017062

出版商:Taylor&Francis    

年代:1935

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1935.12017063

出版商:Taylor&Francis    

年代:1935

数据来源: Taylor