摘要:

ABSTRACTBremiella sphaerosperma sp. nov.parasitic onImpatiensspp. (Balsaminaceae) is described from numerous specimens collected in northeastern North America, and two specimens collected in far eastern USSR.B. sphaerospermais partly sympatric withPlasmopara obducensand was confused with the latter in the past.Peronospora borreriae(Lagerh.) O. Const,comb. nov.(syn.Peronospora borreriaeLagerh.;Plasmopara cruseaeShaw&Safeeulla) parasitic on various Rubiaceae in Central and South America, is described and illustrated.

ISSN:0027-5514    

DOI:10.1080/00275514.1991.12026037

出版商:Taylor&Francis    

年代:1991

数据来源: Taylor

摘要:

ABSTRACTIn fruitbodies ofFlammulina velutipesgrowing on nutrient-supplemented sawdust the pilei were replaced on whole stipes and pilei with stipe apices (2 mm) were grafted in various ways to subapical stipe portions at the beginning of rapid elongation. Hyphal regeneration and fusion occurred in 84–100% of the grafts attempted but stipes and pilei resumed growth in only 28–94%. In whole stipes with replaced pilei elongation almost equalled that of intact fruitbodies, while pileus expansion virtually ceased for two days before resuming. In all other successful grafts rapid growth of both stipe apex and pileus resumed after a delay of 2–3 days, while all stipe portions below the top graft union stopped growing early as did unsuccessful grafts and controls without pilei. Pilei and stipe apices grafted on inverted stipe segments to the base grew as much as with normally oriented ones. Killed segments stopped all apical growth. No primordia regenerated on grafted specimens.The effects of the various grafts are explainable in terms of acropetal transport of mycelial metabolites through living hyphae under the influence of the pilei. Results are also discussed in relation to the control of stipe elongation by the lamellae.

ISSN:0027-5514    

DOI:10.1080/00275514.1991.12026038

出版商:Taylor&Francis    

年代:1991

数据来源: Taylor

摘要:

ABSTRACTFluorescent cyclic decapeptides, the so-called cortinarins, have been claimed to cause, or at least contribute to, the nephrotoxicity of the mushroomCortinarius speciosissima.As the structural elucidation of the cortinarins described in the literature is doubtful, the proposed structures must be disputed. In addition, the present study demonstrates that, on analysis of the fluorescent zones exhibiting the chromatographic behavior described for the cortinarins, only steroids are detectable. Our analytical results indicate that the fluorescence characteristic forCortinarius speciosissimaextracts is mainly due to ergosta-4,6,8(14),22-tetraen-3-one. Furthermore, we did not find any substances referable to cortinarins in extracts of mushrooms originating from different locations or collected in different years. Orelline, a photoproduct of the nephrotoxin orellanine contributes to the fluorescence but shows completely different chromatographic behavior.

ISSN:0027-5514    

DOI:10.1080/00275514.1991.12026039

出版商:Taylor&Francis    

年代:1991

数据来源: Taylor

摘要:

ABSTRACTCatatrama, a new genus in the Tricholomataceae, is described from Costa Rica. Its taxonomic position and its similarity to other genera are discussed. The combination of echinulate, cyanophilic and inamyloid basidiospores, subfree lamellae, and bilateral hymenophoral trama characterize this new genus and species.

ISSN:0027-5514    

DOI:10.1080/00275514.1991.12026040

出版商:Taylor&Francis    

年代:1991

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1991.12026041

出版商:Taylor&Francis    

年代:1991

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1991.12026042

出版商:Taylor&Francis    

年代:1991

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1991.12026043

出版商:Taylor&Francis    

年代:1991

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1991.12026044

出版商:Taylor&Francis    

年代:1991

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1991.12026045

出版商:Taylor&Francis    

年代:1991

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1991.12026046

出版商:Taylor&Francis    

年代:1991

数据来源: Taylor