摘要:

Two hundred and nine isolates of tobacco mosaic virus (TMV) were collected from the spring and fall greenhouse crops, and the field crop of Southern Ontario. Strains of the virus were identified on a series of differentials which included Pelham's four tomato lines heterozygous for the genesTm-1,Tm-2,Tm-1 + Tm-2, andTm-22respectively. There were 164 isolates of TMV strain 0, 15 of strain 1, and 30 which were intermediate in character. Strains 2 and 1.2 were not found. The reactions of a number of lines ofTm-1 differentials of independent origin were compared and found to vary with some virus isolates. The recently introduced TMV-tolerant cultivar Vendor did not have any marked influence on the TMV strain situation in the commercial greenhouse crops either to reduce strain 0 types or to bulk-up strain 1 types which might find this cultivar a congenial host.

ISSN:0008-4166    

DOI:10.1139/m71-021

出版商:NRC Research Press    

年代:1971

数据来源: NRC

摘要:

Butyrivibriosp. C3degraded naringin anaerobically yielding naringenin, neohesperidose, phloroglucinol, andp-hydroxyphenylpropionic acid.

ISSN:0008-4166    

DOI:10.1139/m71-022

出版商:NRC Research Press    

年代:1971

数据来源: NRC

摘要:

The influence of carbon: nitrogen (atom: atom) ratios on production of perithecia bySordaria fimicolawas examined. Media contained KNO3at concentrations of 12 mM, 24 mM, or 48 mM, and glucose or maltose at concentrations providing carbon: nitrogen ratios of 1:10, 1:1, 5:1, 10:1, 20:1, and 30:1. At each concentration of KNO3numbers of perithecia were greatest on media with an initial carbon: nitrogen ratio of 5:1 or 10:1. There was no evidence that the effect of the carbon: nitrogen ratio on the development of perithecia was directly exerted through effects on the amount of growth, the cessation of growth, or the exhaustion of exogenous carbohydrate.

ISSN:0008-4166    

DOI:10.1139/m71-023

出版商:NRC Research Press    

年代:1971

数据来源: NRC