Bacterial wilt of potatoes. I. Field symptoms of the disease and studies on the causal organism, Pseudomonas solanacearum variety asiaticum

1961 ◽  
Vol 12 (5) ◽  
pp. 854 ◽  
Author(s):  
DE Harrison
Keyword(s):  
Bacterial Wilt ◽  
The Other ◽  
Brown Pigment ◽  
Moderate Degree ◽  
Serological Study ◽  
Pseudomonas Solanacearum ◽  
Causal Organism ◽  
Corynebacterium Sepedonicum ◽  
South Wales ◽  
Canadian Culture

By comparison with Kew South Wales and Rhodesian strains of Pseudomonas solanacearum, and a Canadian culture of Corynebacterium sepedonicum, it has been shown that the causal organism of bacterial wilt of potatoes in Victoria is a strain of Ps. Solanacearum, identified as variety asiaticum. This disease is a serious problem in the Koo-wee-rup and Gembrook areas. Many of the local isolates have no brown pigment, while others have a moderate degree of pigmentation, though much less than that of the Kew South Wales strains studied. Detailed symptoms of the disease are given; also the morphological, cultural, physiological, and pathogenic reactions compared with those of the other strains of Ps. Solanacearum studied. A serological study of these organisms will be presented in another paper.

Bacterial wilt of potatoes. II. Serological relationship of two strains of Pseudomonas solanacearum and a culture of Corynebacterium sepedonicum

1961 ◽  
Vol 12 (5) ◽  
pp. 872 ◽  
Author(s):  
DE Harrison ◽  
H Freeman
Keyword(s):  
Bacterial Wilt ◽  
Pseudomonas Solanacearum ◽  
Serological Relationship ◽  
Corynebacterium Sepedonicum ◽  
Potential Value ◽  
Ring Rot ◽  
The Common ◽  
Relationship Of

Antisera were prepared to Victorian and Rhodesian strains of Pseudomonas solanacearum, and to a culture of the ring rot organism, Corynebacterium sepedonicum, from Canada. It was found that the two strains of Ps. Solanacearum were similar, though distinct serologically, and each quite different from C. sepedonicum, although there was some serological affinity between the three organisms. The common agglutinins were absorbed to produce specific absorbed serum for each organism, the potential value of which is briefly discussed.

scholarly journals Żywiołowe rozprzestrzenianie się Poznania: profil morfologiczny i mikroekonomiczny

2020 ◽  
pp. 81-99
Author(s):  
Piotr Lityński
Keyword(s):  
Spatial Structure ◽  
Urban Sprawl ◽  
The Other ◽  
Moderate Degree ◽  
Financial Situation ◽  
Housing Preferences ◽  
Household Budget ◽  
High Degree ◽  
Financial Losses ◽  
Morphological Assessment

The aim of the article is to assess Poznań’s urban sprawl from the perspective of the morphology of space and financial situation of suburban households. The morphological assessment uses a method based on two grids of squares with a side: 1 km, 500 m; and data on the location of buildings from CCGCD. On the other hand, the assessment of households was carried out on the basis of the CSO Household Budget database. The results of the research indicate that the analyzed communes in the Poznań area are characterized by a moderate degree of disorder in the spatial structure. There are no communes with a completely compact specificity, there are also no communes with an absolutely high degree of spatial disorder. Households causing urban sprawl in Poznań are entities that incur moderate financial losses in order to maximize their housing preferences.

scholarly journals Radiocarbon and Thermoluminescence Studies of the Karst Pipe Systems in Southwest England and South Wales

Radiocarbon ◽  
1995 ◽  
Vol 37 (2) ◽  
pp. 111-117 ◽  
Author(s):  
Mieczysław F. Pazdur ◽  
Andrzej Bluszcz ◽  
Anna Pazdur ◽  
Iwona Morawiecka
Keyword(s):  
Ice Sheet ◽  
The Other ◽  
Carbonate Cements ◽  
South Wales ◽  
Sandy Material ◽  
Pipe Systems ◽  
Raised Beaches ◽  
Quartz Grains

Paleokarst forms in raised beach deposits of Southwest England and South Wales and generally known as “pipes” were dated by 14C and thermoluminescence (TL) methods. Current geological opinion is that these pipes are features that developed under the cover of periglacial-solifluctional deposits due to periglacial conditions prevalent in the Late Devensian. In the present study, TL was used to determine the age of quartz grains forming the raised beaches. 14C ages were obtained from carbonate cements within sandrock and on the pipe walls. TL ages measured for quartz grains separated from sandrock samples are older than 80 ka bp, whereas the corresponding TL dates obtained from the sandy material of pipe infills center around 40 ka bp. All carbonates yielded finite apparent 14C dates that range from ca. 45 ka bp to 27 ka bp for sandrock. The apparent 14C dates obtained on carbonate cements from the pipe walls fall into two groups, one ranging from 30 ka bp to 22 ka bp and the other from 15 ka bp to 7 ka bp. On the basis of geochemical considerations, we conclude that the sandrock cements formed between 35 and 25 ka bp and pipe walls cemented between 30 and 2 ka bp with a break during the climate deterioration caused by last ice sheet advance.

scholarly journals Genetic Aspects of Sickle Cell Anemia and Microdrepanocytic Disease

Blood ◽  
1952 ◽  
Vol 7 (4) ◽  
pp. 429-435 ◽  
Author(s):  
E. SILVESTRONI ◽  
I. BIANCO
Keyword(s):  
Sickle Cell ◽  
Sickle Cell Anemia ◽  
Sickle Cell Trait ◽  
Genetic Data ◽  
The Other ◽  
Moderate Degree ◽  
Simultaneous Presence ◽  
Genetic Studies ◽  
Asymptomatic Individuals ◽  
Degree Of Severity

Abstract 1. A brief review is presented of the genetic theories of sickle cell anemia and the sickle cell trait. 2. The genetic data on 2 families of asymptomatic individuals with the sickle cell trait and of 3 families of patients with sickle cell anemia are reported. These data confirm the heterozygous-homozygous theory of Neel. 3. The possibility is considered that many of the cases of sickle cell anemia described in the white race are actually examples of "microdrepanocytic disease." 4. Microdrepanocytic disease is a new syndrome, first described by the authors from Italy. It has some of the characteristics of both sickle cell anemia and Mediterranean anemia. On the basis of studies in 11 families, the presence of the sickle cell trait in one parent and of microcythemia (Mediterranean anemia trait) in the other, results in microdrepanocytic disease in some of the offspring. Hematologic studies in these patients indicate the simultaneous presence of both sickle cell and microcythemic genes. 5. Genetic studies of these families suggests that the genes for microcythemia and for sicklemia are located on different chromosomes and are inherited independently of each other. On the other hand, their simultaneous presence leads to a disease of a moderate degree of severity having many of the features of sickle cell anemia.

A new species and comparative morphology of Vesselowskya (Cunoniaceae)

2001 ◽  
Vol 14 (2) ◽  
pp. 175 ◽  
Author(s):  
Andrew C. Rozefelds ◽  
Richard W. Barnes ◽  
Belinda Pellow
Keyword(s):  
New Species ◽  
Cell Walls ◽  
New South ◽  
Comparative Morphology ◽  
Epidermal Cells ◽  
The Other ◽  
Abaxial Surface ◽  
South Wales ◽  
Central Column ◽  
A New Species

The vegetative and reproductive morphology of Vesselowskya Pampanini, southern marara, is described and illustrated in detail. The variation within V. rubifolia (F.Muell.) Pampanini sens. lat. is shown to be greater than has previously been recognised, with the differences identified supporting the recognition of a new segregate species, V. venusta Rozefelds, R.W.Barnes and Pellow sp. nov. Vesselowskya venusta occurs in the Barrington Tops Plateau of New South Wales and differs from V. rubifolia in possessing hairs on the abaxial surface of the sepals and lacking both a prominent distal connective protrusion on the anthers and colleters at the base of the stipules. The two Vesselowskya species are dioecious with a vestigial ovary in staminate flowers and reduced stamens in pistillate flowers. Dioecy is more pronounced in Vesselowskya, than in some Weinmannia species, and in both genera is expressed through reduction in the size of the ovaries in staminate flowers, and stamens in pistillate flowers. Vesselowskya shares with the other genera in the tribe Cunonieae (Pancheria, Weinmannia and Cunonia), a central column in the fruits, and Cunonia-type stipules, but differs from these genera in having valvate aestivation, digitate leaves, craspedodromous secondary venation with secondary veins terminating at a tooth, tuft domatia along the midrib, adaxial epidermal cells with strongly sinuous cell walls and the absence of hydathodes.

Evaluation of Bos indicus and Bos taurus straightbreds and crosses. II. Post-weaning growth, puberty, and pelvic size of heifers

1994 ◽  
Vol 45 (4) ◽  
pp. 795 ◽  
Author(s):  
H Hearnshaw ◽  
PF Arthur ◽  
R Barlow ◽  
PJ Kohun ◽  
RE Darnell
Keyword(s):  
Body Condition ◽  
Bos Taurus ◽  
Body Condition Score ◽  
Bos Indicus ◽  
The Other ◽  
South Wales ◽  
Condition Score ◽  
Medium Quality ◽  
The Mean ◽  
Pelvic Size

Post-weaning growth and body condition, puberty and pelvic size of 197 heifers comprising straightbred Hereford (HxH) and Brahman (BxB), first-cross (BxH) and back-cross (HxBH and BxBH) heifers were evaluated. The heifers were born over a 3 year period, and grazed improved and semi-improved pastures following weaning at Grafton, New South Wales. Prior to weaning, heifers had been reared by dams on three pasture systems (high, medium and low quality pastures). Heifers from low quality pre-weaning pasture had higher (P < 0.05) post-weaning liveweight gain than those from high and medium quality pastures. BxH heifers gained 71 g/day more (P < 0.05) than the mean gain of their contemporaries of the other genotypes, whose gains were similar, from weaning to either 26 or to 30 months of age. Liveweight at all ages was influenced by genotype x pre-weaning pasture system interaction. At 30 months of age, BxH heifers from high and medium pre-weaning pastures were the heaviest. At the same age, but from low quality pre-weaning pasture, heifers with crossbred dams (HxBH and BxBH) were the heaviest. Wither height depended significantly (P < 0.05) on the proportion of Bos indicus genes, increasing from 113.8 cm in the HxH heifers to 124.4 cm in the BxB heifers at 30 months of age. BxH heifers had a higher (P < 0.05) body condition score than their contemporaries of the other genotypes, which were in similar condition, at 26 and 30 months of age. On average (across pre-weaning pasture system), 9% of BxB heifers had reached puberty by 22 months of age compared to 62, 95, 82 and 64% (s.e.= 9) for HxH, HxBH, BxH and BxBH heifers respectively. No significant genotype differences were obtained in the height, width and size of the pelvic opening of the heifers, measured just prior to the beginning of the mating season at 26 months of age.

Resistance of some Australian inbred maize lines to maize dwarf mosaic disease

1969 ◽  
Vol 9 (40) ◽  
pp. 541 ◽  
Author(s):  
PW Grogan ◽  
DS Teakle
Keyword(s):  
New South ◽  
Natural Infection ◽  
New South Wales ◽  
Inbred Lines ◽  
Mosaic Disease ◽  
The Other ◽  
Maize Inbred Lines ◽  
South Wales ◽  
Resistant Lines

Seven out of eight maize inbred lines developed at Lawes in Queensland from open-pollinated varieties were resistant to maize dwarf mosaic disease when exposed to natural infection in the field. Five of the seven resistant inbred lines failed to become systemically infected when inoculated with infectious sap in the glasshouse. By contrast, only three out of twenty lines introduced from the U.S.A., and two out of eight lines developed at the Grafton and Glen Innes Breeding Stations in New South Wales, were resistant in the field. All three resistant lines from the U.S.A. were systemically infected when inoculated in the glasshouse, but the two resistant lines from Grafton in New South Wales were not. The resistant Lawes and Grafton maize inbred lines would appear to be better sources of genes conferring resistance to maize dwarf mosaic disease than the other lines tested.

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