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  • copper deficiency  (2)
  • Springer  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Copper nutrition of Eucalyptus maculata Hook. seedlings: Requirements for growth, distribution of copper and the diagnosis of copper deficiency (1994)
    Springer
    Plant and soil 167 (1994), S. 181-187 
    Details
    ISSN: 1573-5036
    Keywords: copper deficiency ; critical concentrations ; diagnosis ; Eucalyptus maculata ; lignification ; symptoms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A glasshouse experiment was conducted to define the response of Eucalyptus maculata seedlings to the addition of nine rates of copper (Cu) to a Cu-deficient sand. Plants were harvested 128 days from sowing. Symptoms of Cu deficiency included marginal necrosis in young fully expanded leaves (YFEL), deformed leaf margins, death of lateral shoots, bleeding at nodes on the main stem and reduced lignification of xylem fibres and vessels. Plant height and the number of nodes on the main stem were unaffected. In plants supplied with 0 Cu, whole top and root fresh weights were depressed by 27% and 32% respectively. The external Cu requirement for maximum growth of E. maculata seedlings was similar to that for wheat grown in the same soil. In Cu-adequate plants, leaf Cu concentrations decreased with distance from the shoot apex. Cu levels in stems varied little with position and were similar to the YFEL. Cu concentrations in leaves and stems were depressed in Cu-deficient plants to 〈1.0 μg g−1 dry weight (d.w.) (roots: 1.5 μg g−1 d.w.). The external Cu supply did not greatly alter the distribution of Cu within the plant. Young leaves at the shoot tip are recommended for diagnosis of Cu deficiency: critical values for shoot d.w. were about 1.5 μg Cu g−1 d.w. Lignification of wood was suppressed where Cu concentrations fell below 1.5 μg g−1 d.w.: the Bussler test for lignification would thus be a valuable indicator of Cu deficiency.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00007943
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  • 2
    Electronic Resource
    Electronic Resource
    Functional copper requirement for catechol oxidase activity in plantation Eucalyptus species (1999)
    Springer
    Plant and soil 210 (1999), S. 75-81 
    Details
    ISSN: 1573-5036
    Keywords: copper deficiency ; critical concentration ; Eucalyptus globulus ; Eucalyptus grandis ; Eucalyptus urophylla
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Copper (Cu) deficiency in eucalypts is associated with tree deformation and reduced wood production from plantations. Presently, diagnosis of the early stages of Cu deficiency is unreliable as critical tissue Cu concentrations for tree growth have not been defined. Since wood quality is usually impaired in advance of tree growth, a biochemical test for Cu deficiency was sought for three Eucalyptus species commonly used in plantation forestry (E. globulus Labill., E. grandis Hill ex Maiden and E. urophylla Blake). Foliar Cu requirements for catechol oxidase activity were determined in a glasshouse sand culture study with 10 rates of Cu supply (0, 10-15, 10-14, 10-13, 10-12, 10-11, 10-10, 10-9, 10-7 and 10-5 M). In contrast to shoot dry weight, which only responded to Cu supply in E. urophylla, foliar Cu concentration and catechol oxidase activity, in 140-day-old seedlings, increased with the addition of Cu in all species. Stem lignification also responded to Cu supply in parallel to the activity of catechol oxidase. Functional Cu requirements of 2.4, 2.1 and 2.6 mg kg-1 dry weight for catechol oxidase activity in E. globulus, E. grandis and E. urophylla, respectively, were derived from statistical models fitted to the relationship between catechol oxidase activity and Cu concentrations in recently matured leaves.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004643317708
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