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  • 1965-1969  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Characterization of Boron Deficiency in Soybeans (1969)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 22 (1969), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Boron-deficient soybean roots have a rosette appearance at the terminals caused by the death of the root primordium and the initiation of new root primordia. The root tips show some darkening, swelling, and then a collapse of the tissue. The petiole s of B-deficient plants are very brittle.Physiologically, B-deficiency in HA-soybeans does not appear to involve an interference in the transport of photosynthate (C14 distribution) or precursors required for citrate synthesis in the roots.More Ca 45 was found in the tops of B-sufficient than B-deficient plants, but the opposite trend existed in the root sap. Boron deficiency symptoms were accentuated by maintaining a relatively low pH of the prenutrient solution by the addition of K salts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1969.tb07854.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Fe and Ca Uptake as Related to Root-Sap and Stem-Exudate Citrate in Soybeans (1966)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 19 (1966), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Two soybean varieties that differentially absorb and translocate iron were used to compare root-sap citrate with stem-exudate citrate as they are involved in the uptake of Fe and Ca. The status of Fe and PO4 in the prenutrient solution determined the citrate concentration in the root sap and the citrate translocated in the stem exudate. There was a parallel between the iron and the citrate translocated in the stem exudate, but this relationship did not appear to exist for the citrate and Fe concentrations in the root sap.Iron stress (deficiency) promoted the accumulation of citrate in the root-sap, but there was not a concomitant increase of citrate in the stem exudate. In iron-deficient soybeans, phosphate stress also promoted the accumulation of citrate in the root sap, and here, stem-exudate citrate and root-sap citrate more nearly followed the same trends. The citrate pool in the root appears to result from a deficiency of iron and may not be directly involved in the absorption and translocation of iron from the growth medium. Increasing amounts of phosphate in the prenutrient decreased both the citrate and Fe in the root sap and stem exudate.The factors controlling the uptake of Fe are rather specific and are not related to the uptake of radioactive Ca 45 in soybeans regardless of soybean variety, degree of iron stress, or citrate concentration in the root.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1966.tb07087.x
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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