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  • Cytokinin  (2)
  • Cytokinin (endogenous), metabolism  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Cytokinin metabolism in Phaseolus vulgaris L. (1981)
    Springer
    Planta 153 (1981), S. 297-302 
    Details
    ISSN: 1432-2048
    Keywords: Cytokinin (endogenous), metabolism ; Cytokinin (ribotides) ; Phaseolus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The major cytokinins in stems of decapitated, disbudded bean plants have been identified by enzymic degradation, Sephadex LH20 and reversed phase high performance liquid chromatography, and by combined gas chromatography-mass spectrometry as 6-(4-hydroxy-3-methylbut-trans-2-enylamino)-9-β-D-ribofuranosylpurine (zeatin riboside), 6-(4-hydroxy-3-methylbutylamino)-9-β-D-ribofuranosylpurine (dihydrozeatin riboside), and the 5′-phosphates of these compounds (zeatin ribotide and dihydrozeatin ribotide). Minor cytokinins in this tissue were tentatively identified as dihydrozeatin-O-β-D-glucoside and zeatin ribotide-O-β-D-glucoside. [8-14C-]Dihydrozeatin appeared to be rapidly metabolized to dihydrozeatin ribotide when supplied to segments of stems from decapitated plants. These results are discussed in relation to the metabolism and distribution of cytokinins in the whole plant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00384245
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  • 2
    Electronic Resource
    Electronic Resource
    Dihydroconiferyl alcohol — A cell division factor from Acer species (1981)
    Springer
    Planta 152 (1981), S. 571-577 
    Details
    ISSN: 1432-2048
    Keywords: Acer ; Cytokinin ; Dihydroconiferyl alcohol ; Maple syrup ; Soybean callus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A compound that stimulated growth of soybean callus was isolated from spring sap of sycamore (Acer pseudoplatanus L.). Insufficient compound was isolated to permit it to be characterised. A compound with identical properties was isolated from commercial maple syrup, the concentrated spring sap of Acer saccharum L. The compound was identified as 3-(3-methoxy-4-hydroxyphenyl)-propan-1-ol (dihydroconiferyl alcohol, DCA). DCA was also active in the tobacco callus and radish leaf senescence assays, but was inactive in four other tests for cytokinin activity. DCA acted synergistically with kinetin to promote soybean callus growth. It is concluded that DCA has properties distinct from those of purine cytokinins.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00380830
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  • 3
    Electronic Resource
    Electronic Resource
    A tracheid-differentiation factor from pine needles (1981)
    Springer
    Planta 153 (1981), S. 395-404 
    Details
    ISSN: 1432-2048
    Keywords: Auxin ; Cytokinin ; Leaves (needles) ; Pinus ; Pits, bordered ; Tracheid-differentiation factor ; Vascular cambium ; Xylem
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Exogenous indol-3yl-acetic acid (IAA), alone and together with several cytokinins, was ineffective in promoting the complete differentiation into tracheids of cambial derivatives of Pinus contorta Dougl.; IAA alone promoted cambial cell division and primary-wall growth in cambial derivatives throughout the stem's length. In contrast, a single pair of needles on a stem cutting in light promoted neither cambial cell division nor primary-wall growth in cambial derivatives but did promote complete differentiation of cambial cells into tracheids; tracheids differentiated only near the junction of the foliated short shoot with the stem. Clear inter-and intracellular differences in the extent of tracheid differentiation occurred in response to a single needle pair and have suggested the hypothesis that a specific tracheid-differentiation factor regulates the differentiation of cells into proto-, meta-, or secondary-xylem tracheary elements through an interaction with IAA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00394977
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