摘要:

SummaryThe sclerotia ofPoria Cocos(Schw.) Wolf occur in Florida, especially in the sandy soils. The fruiting stages were developed in pure culture from portions of the inner contents of the sclerotia removed aseptically and planted on poured agar plates. The pores, basidia and spores, in structure, size, shape, color and content, corresponded well with descriptions given by Wolf. The common and scientific names applied to the sclerotium of this fungus since 1722 are given, with the synonyms listed. The term tuckahoe, formerly applied to all tuberous, terrestrial growth, is suggested for the bulbous rootstalks of phanerogamic plants only. The fungous tubers should be grouped under the term sclerotia, when their fruiting structure is unknown, and classified according to the fructifications they are shown to produce. Weathered and partially disintegrated fruiting structures similar to those artificially developed, resembling a Poria, were observed in nature on the cortex of several sclerotia.The following new hosts of the fungus are reported from Florida: magnolia,Magnolia grandiflora;grapefruit,Citrus paradisi;sweet orange,Citrus sinensis;oak,Quercussp., and eucalyptus,Eucalyptussp. (Figs. 2–5).

ISSN:0027-5514    

DOI:10.1080/00275514.1929.12016943

出版商:Taylor&Francis    

年代:1929

数据来源: Taylor

摘要:

SummaryMacrophoma Pachysandraen. sp. has been found onPachysandra terminalis, causing black pustules but no definite cankers on the dead or partially dried stems.The pycnidia are globose to ovoid, 200–250×150–175μ, and are formed singly in the epidermis and cortex of the stem.The hyaline to light brown spores are formed on short hyaline conidiophores. The spore measurements are 11.8-18.3×3.9-9.8μ. The standard range is 13.51-14.99×4.98-6.38μ. During germination the spores usually send out a germ tube at one or both ends. A septum sometimes forms in the germinating spore. The optimum temperature for spore germination is 28°C.The mycelium lives intracellularly in the cortex and epidermis. The optimum temperature for growth of the mycelium is 28°C. The best growth is obtained on malt agar.The fungus enters the host through stornata or wounds. Inoculations thus far indicate that the fungus is a saprophyte. The perfect stage has not been determined.Volutella Pachysandraeproduces a diseased condition in the stems and sometimes in the leaves ofPachysandra terminalis.A constriction is formed on the stem. Irregular browned areas appear on the leaves.The sessile to stipitate sporodochia are seashell pink in color and average 5–6 mm. in diameter. The setae measure 250–450×4–7μ. and are 3- to 7-septate.The spores are hyaline and single-celled. They measure 2.3-6.1×0.9-2.4μ. The standard range is 3.99-5.29×1.34-2.3μ. A large vacuole is usually formed at the time of germination. 28°C. is the optimum temperature for spore germination.The mycelium is intracellular. 28°C. is the optimum temperature for growth of the mycelium. The fungus shows the best and most rapid growth on potato agar.

ISSN:0027-5514    

DOI:10.1080/00275514.1929.12016944

出版商:Taylor&Francis    

年代:1929

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1929.12016945

出版商:Taylor&Francis    

年代:1929

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1929.12016946

出版商:Taylor&Francis    

年代:1929

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1929.12016947

出版商:Taylor&Francis    

年代:1929

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1929.12016948

出版商:Taylor&Francis    

年代:1929

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1929.12016949

出版商:Taylor&Francis    

年代:1929

数据来源: Taylor