ISSN:0003-4746    

DOI:10.1111/j.1744-7348.1940.tb07502.x

出版商:Blackwell Publishing Ltd    

年代:1940

数据来源: WILEY

摘要:

Two earlier papers have established (1) that the late‐flowering chrysanthemum, a typical “short‐day” species, flowered in autumn because of a disability in nocturnal translocation which limited the amount of carbohydrate available at the growing‐point during the short nights of summer (Grainger, 1938), and (2) that many plants which flower in spring and early summer actually begin the formation of their flower initials in the autumn and winter of the previous year (Grainger, 1939). Such plants might conceivably be “short‐day” kinds, since the actual transformation from vegetative to floral organization of the growing‐point was accomplished when the days were short. It therefore appears necessary to investigate their relative diurnal carbohydrate metabolism, in order to discover whether it has any causal relationship with the time of actual flower initiation, as was demonstrated for the late‐flowering chrysanthemum. The present paper describes the results of such an investigation, and also of certain contributory studies as to the converse effect of flowering upon metabolism, the relative amount of energy used in flowering, and the possible inadequacy of nutrition in very

ISSN:0003-4746    

DOI:10.1111/j.1744-7348.1940.tb07503.x

出版商:Blackwell Publishing Ltd    

年代:1940

数据来源: WILEY

ISSN:0003-4746    

DOI:10.1111/j.1744-7348.1940.tb07504.x

出版商:Blackwell Publishing Ltd    

年代:1940

数据来源: WILEY

摘要:

UstilagoHypodyteswas recorded by Berkeley&Broome (1841, 1850) and occurs onElymus arenariusandAgropyrumspecies. A knowledge of its life‐history on these plants appeared desirable in view of the possibility of an extension in host range to nearly related cereals, added emphasis being given to this viewpoint by the recent production of perennialTriticum‐Agropyrumhybrids.Elymus arenariusis widely planted to prevent coastal erosion, and no knowledge was available of the effect of the fungus on its suitability for this purpose. The virtual absence of seed production by infected plants is known. In America,Ustilago hypodyteswas described by Fischer (1938) as an increasing menace to the cultivation ofAgropyrum cristatum(L.) Beauv. and other valuable forage grasses. The disease onElymuswas studied by Bornhövd (1936), who gave a full summary of the literature. She described the process of spore germination and the growth and nuclear behaviour of the fungus on artificial media, but dealt less adequately with the symptoms and spread of the disease and the histology of infection: her inoculation experiments were inconclu

ISSN:0003-4746    

DOI:10.1111/j.1744-7348.1940.tb07505.x

出版商:Blackwell Publishing Ltd    

年代:1940

数据来源: WILEY

ISSN:0003-4746    

DOI:10.1111/j.1744-7348.1940.tb07506.x

出版商:Blackwell Publishing Ltd    

年代:1940

数据来源: WILEY

ISSN:0003-4746    

DOI:10.1111/j.1744-7348.1940.tb07507.x

出版商:Blackwell Publishing Ltd    

年代:1940

数据来源: WILEY

ISSN:0003-4746    

DOI:10.1111/j.1744-7348.1940.tb07508.x

出版商:Blackwell Publishing Ltd    

年代:1940

数据来源: WILEY

ISSN:0003-4746    

DOI:10.1111/j.1744-7348.1940.tb07509.x

出版商:Blackwell Publishing Ltd    

年代:1940

数据来源: WILEY

ISSN:0003-4746    

DOI:10.1111/j.1744-7348.1940.tb07510.x

出版商:Blackwell Publishing Ltd    

年代:1940

数据来源: WILEY

ISSN:0003-4746    

DOI:10.1111/j.1744-7348.1940.tb07511.x

出版商:Blackwell Publishing Ltd    

年代:1940

数据来源: WILEY