摘要:

The following species ofPeziculahave been cultured and the genetic connection of their conidial stages has been established;Pezicula carpinea(Pers.) Tul. with the conidial stageCryptosporiopsis fasciculata(Tode) Petr.,Pezicula pruinosaFarl. with the conidial stageSphaeronema pruinosumPeck,Pezicula Corniwith the conidial stageCryptosporiopsis cornina(Peck) Petr. and Syd.,Pezicula Rubi(Lib.) Niessl with the conidial stageDiscosporiella phaeosora(Sacc.) Petr., andPezicula Hamamelidisn. sp. with the conidial stage aCryptosporiopsisspecies.The form of the conidial spore is relatively constant in the different species, but the form of the conidial fruiting body is variable.

ISSN:1923-4287    

DOI:10.1139/cjr39c-012

出版商:NRC Research Press    

年代:1939

数据来源: NRC

摘要:

The immersion of iris bulbs in water at 110 to 112° F. for 60 min. effectively destroys the bulb nematode.The safe period for nematode destruction in iris by hot water lies between July 26 and August 9. Thereafter injury to the bulbs occurs and is progressively greater as the immersion dates are delayed.

ISSN:1923-4287    

DOI:10.1139/cjr39c-013

出版商:NRC Research Press    

年代:1939

数据来源: NRC

摘要:

A study has been made of the decomposition of glucose in two cultivated podsol soils that had previously been treated with alkaline amendments. Limestone increased, and sodium carbonate decreased, the amount of carbon dioxide produced from the control samples; limestone increased the rate of evolution both in control samples and in samples receiving glucose. The total amount of carbon dioxide produced was increased by limestone in combination with sodium carbonate but not by limestone alone. The numbers of heterotrophic bacteria developing with glucose were stimulated by limestone.

ISSN:1923-4287    

DOI:10.1139/cjr39c-014

出版商:NRC Research Press    

年代:1939

数据来源: NRC

摘要:

Vibrio amylocella, n. sp., isolated from soil, attacks cellulose, starch, dextrin, and sugars. It does not grow in mediums containing beef extract. It can obtain its nitrogen from peptone, amino-acids, and mineral salt compounds, when supplied with a suitable source of carbon. Glucose is formed from starch and dextrin in liquid cultures, and accumulates in a starch medium containing ammonium chloride, but is utilized completely when potassium nitrate is supplied. The accumulation of glucose is related to the development of acidity, which renders the organism non-viable. Calcium carbonate depresses diastatic action and enables the organism to utilize the glucose formed.The diastatic enzyme ofV.amylocellais more active apart from the organism than in its presence. The organism is more active in starch hydrolysis than some common diastatic organisms.

ISSN:1923-4287    

DOI:10.1139/cjr39c-015

出版商:NRC Research Press    

年代:1939

数据来源: NRC