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  • Articles  (9)
  • Lycopersicon esculentum  (9)
  • 1985-1989  (9)
  • 1950-1954
  • 1945-1949
  • 1985  (9)
  • Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition  (9)
  • Sociology
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  • Articles  (9)
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  • 1985-1989  (9)
  • 1950-1954
  • 1945-1949
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Euphytica 34 (1985), S. 177-185 
    ISSN: 1573-5060
    Keywords: Lycopersicon esculentum ; tomato ; leaf hairs ; pubescence ; Tetranychus urticae ; spider mite
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Leaflets from 11 L. esculentum x L. hirsutum F2 individuals were bioassayed with spider mites (Tetranychus urticae). Densities of Type I, Type III, Type IV, Type V, and Type VI trichomes and the intensity of red fluorescence of the Type VI trichome tip varied widely among the 11 F2 hybrids. Mite responses were analyzed in relation to these trichome characters and leaflet surface. Variation in Type IV density accounted for most of the variation in mite responses. Densities of Type I, V and VI trichomes also contributed to mite responses but their effects were obscured by high Type IV densities. Type VI tip fluorescence was not associated with responses of mites in bioassays of these hybrids.
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  • 2
    ISSN: 1573-5060
    Keywords: Lycopersicon esculentum ; tomato ; physiological characters ; breeding ; low energy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary An introduction is given to a series of papers on an investigation into the possibilities of using physiological characters in breeding tomato for low energy conditions.
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  • 3
    ISSN: 1573-5060
    Keywords: Lycopersicon esculentum ; tomato ; low light intensity ; low temperature ; photosynthesis ; dark respiration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Net photosynthesis and dark respiration of sixteen selected tomato genotypes grown under low light intensity and low night temperatures were measured. Differences between genotypes in net photosynthesis and dark respiration were present. In all genotypes an increase of net photosynthesis with time was observed. Significant genotypic differences in this respect were established. The rate of dark respiration remained constant throughout the experimental period. The photosynthesis on a leaf area basis and dark respiration were not affected by the night temperature. Net photosynthesis on a fresh weight basis was lower under the lower night temperatures.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Euphytica 34 (1985), S. 53-64 
    ISSN: 1573-5060
    Keywords: Lycopersicon esculentum ; tomato ; Lycopersicon hirsutum ; trichome ; leaf hairs ; pubescence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Density of certain types of trichomes were characterized on leaflets of Lycopersicon hirsutum, L. esculentum and their hybrids. Trichome density covaried with leaflet development, and depending on the species and type of trichome, density also covaried with leaflet surface. Type IV trichomes were not observed on leaflets of L. esculentum and Type V trichomes were not observed on leaflets of L. hirsutum. Type IV and V trichomes were present on F1 hybrids and densities of these two types of trichomes segregated in the F2 population. When corrected for differences of leaflet size between L. hirsutum and L. esculentum, densities of Type VI trichomes were more similar between species than uncorrected densities. There was little difference in Type VI density among F2 individuals. The appearance, lipid and phenol staining properties, and native fluorescence of the multicellular tip of the Type VI trichome differed between L. hirsutum and L. esculentum. F1 hybrids were intermediate for these characters and these characters segregated in the F2 generation.
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Euphytica 34 (1985), S. 467-473 
    ISSN: 1573-5060
    Keywords: Lycopersicon esculentum ; tomato ; cell division ; carbon metabolism ; temperature ; cell culture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary At present research into the inhibition of plant growth by sub-optimal temperatures is concerned with the examination of a large number of factors. No single aspect of the response to temperature has been found to be of paramount importance. As a consequence selection for low temperature tolerance is complicated. Here a new approach is proposed in which inhibition of cell division is regarded as a limiting process in growth under sub-optimal temperatures, and the role of other processes as the supply of substrate for cell division. This approach may be of use in the examination of the response of plant growth to temperature and could form the basis of a method for screening and selection for cold tolerance using cells in culture.
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  • 6
    ISSN: 1573-5060
    Keywords: Lycopersicon esculentum ; tomato ; genotypes ; stomatal resistance ; specific leaf fresh weight ; net photosynthesis ; low light intensity ; low temperature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Differences between tomato genotypes (Lycopersicon esculentum Mill.) in stomatal resistance (rs) and specific leaf fresh weight (SLFW) were observed under low light intensity and low night temperature. No relationship between rs and previously published rates of net photosynthesis per dm2 leaf area (PA) was discovered. A negative relationship between SLFW and net photosynthesis per gram fresh weight (PFW) was found but no clear relationship between SLFW and PA. Genotypes with a low SLFW seem better adapted to a low light intensity.
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  • 7
    ISSN: 1573-5087
    Keywords: Lycopersicon esculentum ; tomato fruit ; organ culture ; polyamines ; ODC ; ADC
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The apparent involvement of ornithine decarboxylase (ODC) and putrescine in the early stages of fruit growth in tomato (Lycopersicon esculentum Mill.) has been previously described. Further evidence presented here supports the direct involvement of ODC and putrescine in the cell division process in tomato fruits. In tomato fruits grown in vitro, in which basic growth processes are inhibited, the activity of ODC and arginine decarboxylase (ADC) and the level of free polyamines were reduced. While ODC and ADC activity was correlated with the period of cell division in the tomato fruit, the free polyamine content was correlated with the DNA content, cell size, and fruit fresh weight. The addition of exogenous putrescine, however, did not restore the basic growth processes in the fruits grown in vitro.
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  • 8
    ISSN: 1573-5036
    Keywords: Lycopersicon esculentum ; Mineral content ; Nutrient uptake ; Verticilliosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Summary Uptake and mineral content of nutritive elements (K+, Na+, Ca2+) were studied in young tomato plants infected by 4 strains ofVerticillium albo-atrum, microsclerotial form, which were hyalin or wild in their phenotypes, and low or high in their pathogenicity. Aerial parts of the plants were the most affected by the decrease of growth induced by verticilliosis (90% of inhibition by strains 10 and 15). There was no correlation between either virulence or mineral content of strains and their phenotype. K+/Na+ substitution estimated by mineral uptake of the roots or mineral content of the whole plant, was found in the most affected young plants. Addition of nutrients, mainly sodium, by the fungus could not explain the previous fact. The alteration of membrane selectivity was discussed in relation to results obtained with calcium (amount and uptake did not vary in infected plants) and with sodium (amount varied significantly depending on mycelial strain).
    Notes: Résumé L'accumulation et la composition minérale en K+, Na+ et Ca2+ sont analysées chez des jeunes plantes de tomate infectées par 4 lignées deVerticillium albo-atrum, forme à microsclérotes, de phénotypes hyalin ou sauvage, et de pathogénicité forte ou faible. Les parties aériennes sont les principaux organes affectés par la réduction de croissance due à la verticilliose (90% d'inhibition avec les lignées 10 et 15). Aucune corrélation n'est établie entre la virulence ou la composition minérale des souches et le phénotype du mycélium. La substitution K+/Na+ mesurée par l'étude de l'absorption des éléments ou de la composition minérale de la plante entière est constatée chez les jeunes plantes les plus atteintes. L'apport d'élément nutritif (sodium en particulier) supplémentaire par le champignon ne peut être impliqué. L'altération de la sélectivité membranaire est discutée en fonction des résultats obtenus d'une part avec le calcium, dont la teneur et l'absorption ne varient pas chez les plantes infectées, et d'autre part avec le sodium dont le taux varie trés significativement en fonction de la lignée mycélienne.
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  • 9
    ISSN: 1573-5036
    Keywords: Biological control ; Fusarium crown and root rot ; Lycopersicon esculentum ; Vesicular-arbuscular endomycorrhizae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The influence of five substrates on the interaction betweenGlomus intraradices andFusarium oxysporum f.sp.radicis-lycopersici and its effect on tomato plants development was investigated. The presence ofG. intraradices decreased root necrosis in all substrates and affected the Fusarium population with different intensity depending on the substrate used. Substrates were found to influence disease development, Fusarium population in the substrate, root colonization by the endomycorrhizal fungus and growth of the host plant. In addition to providing good experimental conditions, the use of calcined montmorillonite clay also facilitated washing, recuperation, necrosis evaluation and staining of roots. Its use is proposed as a standard medium for experimental work on the interactions between endomycorrhizal fungi, root pathogens and host plants.
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