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  • 1
    Electronic Resource
    Electronic Resource
    Effects of three systemic insecticides on seed germination and growth ofPinus halepensis seedlings (1982)
    Springer
    Plant and soil 64 (1982), S. 255-258 
    Details
    ISSN: 1573-5036
    Keywords: Growth of seedlings ; Pinus halepensis ; Seed germination ; Systemic insecticides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The systemic insecticides Acephate, Chlorpyrifos, and Oxamyl were variously toxic toPinus halepensis seeds and seedlings. When applied directly to seeds. Oxyamyl completely suppressed germination; Acetate and Chlorpyrifos greatly inhibited germination. The insecticides either prevented emergence or inhibited elongation of cotyledons and radicals. The insecticides were toxic to youngPinus halepensis seedlings whether applied to the soil or as shoot dips. Oxamyl was the most toxic of the three insecticides
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02184257
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of temperature regime on growth and subsequent responses ofSophora japonica seedlings to SO2 (1985)
    Springer
    Plant and soil 88 (1985), S. 399-405 
    Details
    ISSN: 1573-5036
    Keywords: Air pollution ; Growth of seedlings ; Preconditioning ; SO2 ; Sophora japonica ; Temperature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Ten-week-oldSophora japonica seedlings were grown for 10 weeks at 17, 22, or 27°C and then exposed to 0 or 1.0 μℓ/SO2 for 48 hours. The seedlings were subsequently grown at 22°C and harvested 12 weeks later. Effects of preconditioning temperature and SO2 on leaf formation, seedling height and stem diameter, as well as dry weight increment and relative growth rates of leaves, stems, and roots were studied. The preconditioning temperature regime influenced growth and subsequently affected SO2 uptake and growth. However, the responses of seedlings to temperature and SO2 varied with the growth parameter measured. The need for greater standardization of methods and criteria for assessing pollution tolerance of plants is emphasized.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02197496
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  • 3
    Electronic Resource
    Electronic Resource
    Tolerance ofPinus densiflora, Pinus thunbergii, andLarix leptolepis seedlings to SO2 (1985)
    Springer
    Plant and soil 88 (1985), S. 385-397 
    Details
    ISSN: 1573-5036
    Keywords: Air pollution ; Gymnosperms ; Growth of seedlings ; InjuryLatrix leptolepis ; Pinus densiflora ; Pinus thunbergii ; SO2
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Effects of exposure to SO2 at 0.5, 1.0, and 1.5 ppm for 48 hours on sulfur uptake, needle injury, height growth, diameter growth, dry weight increment, and relative growth rate of seedlings of three species of gymnosperms were investigated in a controlled environment. On the basis of such responses as needle injury, dry weight increment, relative growth rate, and diameter growth, tolerance to SO2 60 days after treatment varied in the following order:Pinus thunbergii (most tolerant),Pinus densiflora, Larix leptolepis (least tolerant). On the basis of height growth response the order of SO2 tolerance was:Pinus densiflora〉Pinus thunbergii〉Larix leptolepis. The range of response to SO2 of the three species varied with the specific response measured. The usefulness of relative growth rate as a pollution response is emphasized because of differences among species in initial size and growth rate. Limitations of using height growth responses to determine pollution tolerance are discussed. Caution is advised in constructing tables of pollution tolerance of plants by using data of investigators who apply different criteria for assessing plant responses to air pollution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02197495
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  • 4
    Electronic Resource
    Electronic Resource
    Physiological, morphological, and growth responses ofPlatanus occidentalis seedlings to flooding (1982)
    Springer
    Plant and soil 66 (1982), S. 243-255 
    Details
    ISSN: 1573-5036
    Keywords: Adaptation ; Adventitious roots ; Ethylene ; Flooding ; Growth of seedlings ; Lenticels ; Platanus occidentalis ; Stomatal aperture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Flooding ofPlatanus occidentalis L. seedlings for up to 40 days induced several changes including early stomatal closure, greatly accelerated ethylene production by stems, formation of hypertrophied lenticels and adventitious roots on submerged portions of stems, and marked growth inhibition. Poor adaptation ofPlatanus occidentalis seedlings to soil inundation was shown in stomatal closure during the entire flooding period, inhibition of root elongation and branching, and death of roots. Some adaptation to flooding was indicated by (1) production of hypertrophied lenticels which may assist in exchange of dissolved gases in flood water and in release of toxic compounds, and (2) production of adventitious roots on stems which may increase absorption of water. These adaptations appeared to be associated with greatly stimulated ethylene production in stems of flooded plants. The greater reduction of root growth over shoot growth in flooded seedlings will result in decreased drought tolerance after the flood waters recede. The generally low tolerance to flooding of seedlings of species that are widely rated as highly flood tolerant is emphasized.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02183983
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