STUDIES IN RACIAL TRENDS AND CONSTANCY IN CLADOSPORIUM FULVUM COOKE

1950 ◽  
Vol 28c (5) ◽  
pp. 535-565 ◽  
Author(s):  
D. L. Bailey
Keyword(s):  
Lycopersicon Esculentum ◽  
Mixed Cultures ◽  
The Other ◽  
Cladosporium Fulvum ◽  
Susceptible Host ◽  
Physiological Races ◽  
The Past ◽  
Perfect Stage ◽  
Lycopersicon Esculentum Mill ◽  
Controlled Conditions

Intensive surveys of the physiological races of Cladosporium fulvum Cke. have been carried out during the past decade in southwestern Ontario, as a result of which seven such races have been identified. These are separated by differential reactions of the following hosts: Lycopersicon esculentum Mill. varieties Potentate, Stirling Castle, Vetomold, V-121, and V-473; L. pimpinellifolium (Jusl.) Mill., Vineland, No. 160 and No. 11-22-15 strains; L. hirsutum Humb. and Bonpl. and L. hirsutum var. glabratum Muller. Evidence is presented that only two of these races existed when the surveys began and that the other five have arisen, probably through mutation, during the period under study. There is further a strong suggestion that the stimulus responsible for these mutations is somehow related to the colonization of an incompatible host by a race which remains stable pathogenically while in association with a susceptible host. Comparable mutants have not been encountered under experimentally controlled conditions. A perfect stage has not been found or induced to form in C. fulvum. A limited number of types of cultural mutants are produced consistently and these have been studied with respect to variability and the factors initiating them. Such mutants frequently do not form spores and in most instances have a reduced sporing potential; they are unchanged in pathogenicity or are slightly less aggressive than the parent to all the resistant hosts. In mixed cultures of races 1 and 5 and 1 and 7, the components survived several transfer generations both in culture and on a susceptible host.

scholarly journals Effect of biofertilizers on growth, photosynthetic and biochemical parameters of tomato (Lycopersicon esculentum Mill.)

2021 ◽  
Vol 8 (3) ◽  
pp. 10-14
Author(s):  
S. Prabakaran ◽  
R. Bakiyaraj ◽  
L. Baskaran
Keyword(s):  
Lycopersicon Esculentum ◽  
Biochemical Parameters ◽  
Biological Activities ◽  
Organic Amendments ◽  
The Other ◽  
Growth Stages ◽  
Biological Processes ◽  
Microbial Inoculants ◽  
Nutritional Elements ◽  
Lycopersicon Esculentum Mill

The biofertilizers are commonly called as microbial inoculants which are capable of mobilizing important nutritional elements in the soil from non-usable to usable form by the crop plants through their biological processes. The present investigation was carried out to study the application of soil organic amendments Azospirillum, Rhizobium, Phosphobacteria and Pseudomonas fluorescens significantly increased morphological, photosynthetic and biochemical parameters on tomato (Lycopersicon esculentum Mill.) at all growth stages. It can be concluded that biofertilizer manure can be used for quick stabilization of soil fertility as well as biological activities, which is in turn help in nutrient availability during transition periods. Finally, it was observed that the plants treated with experimental biofertilizer Rhizobium showed excellent results in the morphological and biochemical parameters as compared to the other biofertilizers and also control.

scholarly journals Comparative karyotype and RAPD analysis for characterizing three varieties of Lycopersicon esculentum Mill.

2013 ◽  
Vol 41 (2) ◽  
pp. 149-154 ◽  
Author(s):  
Sheikh Shamimul Alam ◽  
Elham Ishrat ◽  
Md Yahia Zaman ◽  
Md Ahashan Habib
Keyword(s):  
Lycopersicon Esculentum ◽  
Rapd Markers ◽  
Rapd Analysis ◽  
Karyotype Analysis ◽  
The Other ◽  
Rapd Fingerprinting ◽  
Lycopersicon Esculentum Mill ◽  
Other Hand ◽  
Agriculture Research Institute ◽  
Research Institute

Three tomato varieties (Lycopersicon esculentum Mill.) viz. BARI tomato-11, BARI tomato-2 and BARI tomato-3 released from Bangladesh Agriculture Research Institute (BARI) were characterized by karyotype analysis and RAPD markers. BARI tomato-11 and BARI tomato-2 were found to possess 2n = 24 metacentric chromosomes. On the other hand, 2n = 25 metacentric chromosomes were observed in BARI tomato-3 revealing a trisomic variety. The karyotype of the three varieties was very symmetric and each of the varieties showed specific and unique RAPD fingerprinting. Therefore, based on karyotype and RAPD analysis the three tomato varieties could be characterized. DOI: http://dx.doi.org/10.3329/bjb.v41i2.13439 Bangladesh J. Bot. 41(2): 149-154, 2012 (December)

scholarly journals 924 PB 473 EFFECT OF PACKAGING ON POSTHARVET LOSSES OF TOMATOES DURING TRANSPORTATION TO THE MARKET IN ZAMBIA

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 566e-566
Author(s):  
Mungule D. Chikoye
Keyword(s):  
Lycopersicon Esculentum ◽  
The Other ◽  
Processing Industry ◽  
Lycopersicon Esculentum Mill ◽  
Different Types ◽  
Tomato Processing ◽  
Production Area ◽  
In Transit

A two year study was conducted in the high tomato (Lycopersicon esculentum Mill.), production area of the country (Central and Lusaka Provinces). Tomatoes for the market are packed in wooden boxes, open metal basins and grass baskets. Approx. 5-10% and 20-30% of the fruits packed in wooden boxes, basins and baskets respectively got damaged in transit from site of production to the market. Damage of fruits in wooden boxes was mainly due to the transportation in vehicles of overipe fruits on bumpy roads. Regarding the other containers damage was caused by stacking the containers, on top of each other as well as having different types of produce on top. Most of the damaged fruits could not be sold as the tomato processing industry is not yet well developed.

Influence du milieu de culture et du cultivar sur la qualité et la conservation post-récolte de la tomate hydroponique de serre

1996 ◽  
Vol 76 (3) ◽  
pp. 515-519 ◽  
Author(s):  
M. Mzouri ◽  
A. Gosselin ◽  
J. Makhlouf
Keyword(s):  
Lycopersicon Esculentum ◽  
Titratable Acidity ◽  
The Other ◽  
Soluble Solids ◽  
Planting Density ◽  
Tomato Cultivar ◽  
Post Harvest ◽  
Lycopersicon Esculentum Mill ◽  
Significant Difference ◽  
Marketable Fruit

Plants of nine tomato cultivar (Lycopersicon esculentum Mill.) of contrasting breeding origins where grown under two growing systems using the nutritive film technique (NFT) and a peat substrate. Planting density was 3 plants m−2. Yield of marketable fruit, culls and four fruit quality parameters (texture, colour, titratable acidity and total soluble solids) were measured at harvest and over 28 d post-harvest. Two varieties were used: Trust, one of the most popular cultivars in Canada, and Cencara a newly released cultivar with long-keeping quality. Over a 21-wk harvest period there was no significant difference for yield or for post-harvest characteristics between the two growth substrates. Trust produced highest yields, compared to the other cultivars, followed by Bounty with a yield 1.6 kg m−2 lower. Bounty and Panther yielded significantly greater masses of marketable fruit than the other cultivars. The new cultivar Cencara showed significantly lower total and marketable yields than the other cultivars, because of the small size of its fruit. At harvest and in storage, Cencara showed better keeping qualities than Trust, while the latter had better eating qualities. Key words: Peat substrate, nutritive film technique, tomato, Lycopersicon esculentum Mill.

scholarly journals 923 PB 470 EFFECT OF HARVEST STAGE ON SOLIDS, ACIDS, FIRMNESS, AND SHELF-LIFE OF TOMATO

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 566d-566
Author(s):  
J. W. Scott ◽  
Elizabeth A. Baldwin
Keyword(s):  
Lycopersicon Esculentum ◽  
Shelf Life ◽  
Titratable Acidity ◽  
The Other ◽  
Soluble Solids ◽  
Fresh Market ◽  
Stages Of Development ◽  
Clear Effect ◽  
Lycopersicon Esculentum Mill ◽  
Ripe Stage

Fruit of 10 tomato (Lycopersicon esculentum Mill.) cultigens, including five typical fresh market F1's, two rin/ + F1's, two very firm (ultrafirm) inbreds, and an antisense PG F1, were harvested at mature green, breaker, and table ripe stages of development, passed over a grader and taken to a lab (21°C) for analyses of soluble solids, titratable acidity and firmness at the table ripe stage. Shelf life was also measured. Cultigens varied in response to both solids and acids at the three harvest stages, thus there was no clear effect of harvest stage on these variables. The rin /+ F1's and ultrafirm inbreds were significantly firmer than the other cultigens at the table ripe and breaker stages. Shelf life tended to decrease with maturity at harvest. One rin /+ F1 had the greatest shelf life at all harvest stages. Ultrafirm and antisense PG cultigens had greater shelf life than the other six cultigens at the table ripe stage.

Immunoferritin localization of intracellular antigens in positively stained frozen sections

1978 ◽  
Vol 36 (2) ◽  
pp. 168-169
Author(s):  
K. T. Tokuyasu
Keyword(s):  
Surface Tension ◽  
Water Surface ◽  
Thin Layers ◽  
The Other ◽  
Positive Staining ◽  
Frozen Sections ◽  
The Past ◽  
Ultrathin Frozen Sections ◽  
Definition Of

During the past investigations of immunoferritin localization of intracellular antigens in ultrathin frozen sections, we found that the degree of negative staining required to delineate u1trastructural details was often too dense for the recognition of ferritin particles. The quality of positive staining of ultrathin frozen sections, on the other hand, has generally been far inferior to that attainable in conventional plastic embedded sections, particularly in the definition of membranes. As we discussed before, a main cause of this difficulty seemed to be the vulnerability of frozen sections to the damaging effects of air-water surface tension at the time of drying of the sections.Indeed, we found that the quality of positive staining is greatly improved when positively stained frozen sections are protected against the effects of surface tension by embedding them in thin layers of mechanically stable materials at the time of drying (unpublished).

Applications of Through-Focus Dark Field Image Shifts to Phase Identification

1975 ◽  
Vol 33 ◽  
pp. 178-179
Author(s):  
Prakash Rao
Keyword(s):  
Dark Field Image ◽  
Thin Foil ◽  
Dark Field ◽  
The Other ◽  
Stereo Image ◽  
Phase Identification ◽  
The Past ◽  
Field Electron Microscopy ◽  
Dark Field Electron ◽  
Recent Extension

Image shifts in out-of-focus dark field images have been used in the past to determine, for example, epitaxial relationships in thin films. A recent extension of the use of dark field image shifts has been to out-of-focus images in conjunction with stereoviewing to produce an artificial stereo image effect. The technique, called through-focus dark field electron microscopy or 2-1/2D microscopy, basically involves obtaining two beam-tilted dark field images such that one is slightly over-focus and the other slightly under-focus, followed by examination of the two images through a conventional stereoviewer. The elevation differences so produced are usually unrelated to object positions in the thin foil and no specimen tilting is required.In order to produce this artificial stereo effect for the purpose of phase separation and identification, it is first necessary to select a region of the diffraction pattern containing more than just one discrete spot, with the objective aperture.

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