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  • Puccinia infection  (1)
  • leaf ontogeny  (1)
  • Springer  (2)
  • National Academy of Sciences
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  • Springer  (2)
  • National Academy of Sciences
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  • 1
    Electronic Resource
    Electronic Resource
    Oleosomes in flag leaves of wheat; their distribution, composition and fate during senesence and rust-infection (1981)
    Springer
    Planta 152 (1981), S. 36-43 
    Details
    ISSN: 1432-2048
    Keywords: Leaf ; Oleosomes ; Puccinia infection ; Senescence (leaves) ; Triacylglycerol ; Triticum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Oleosomes, up to 14μm in diameter, were found in mesophyll and bundle sheath cells of the flag and lower leaves of wheat cv Professeur Marchal. They develop in flag leaves at least 10 d before anthesis, possibly from fatty acids secreted by the plastids, and persist in mature and senescing leaf tissue. Oleosomes are bordered with an osmiophilic layer rather than a unit membrane. The major lipids of oleosomes, isolated 20 d after anthesis, are triacylglycerols (50%) and sterol or wax exter (34%). The dominant fatty acids of both lipid classes are plamitic (16:0) and stearic (18:0) acids which accounts for the low osmiophilia of the oleosomes. The function of the oleosomes is unknown but they may act as short-term energy reserves. Oleosomes persist in leaves infected with brown rust, even in cells penetrated by haustoria. Yellowish-brown oleosomes found in senescing and rust-infected leaves may be formed by the release and coalescence of pigmented plastoglobuli.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00384982
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  • 2
    Electronic Resource
    Electronic Resource
    The use of image analysis to study developmental variation in micropropagated potato (Solanum tuberosum L.) plants (1999)
    Springer
    Potato research 42 (1999), S. 541-548 
    Details
    ISSN: 1871-4528
    Keywords: epigenetic variation ; leaf ontogeny ; somaclonal variation ; tissue culture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Potato leaf morphology changes during plant development with the phase shift from vegetative growth to flowering. Image analysis can detect differences in leaf morphology and has been used here to distinguish differences in leaf morphology between potato crops derived from seed tubers and minitubers and between crops derived from different micropropagation protocols. Further, leaf shape parameters can be used to determine the relative maturity of crops. This finding is of economic importance since differences in plant development, for example delayed flowering, are associated with yield parameters. It is hypothesised that image analysis of established microplants can be used as an early evaluation of micropropagation protocols for potato.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02358170
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    Paper (German National Licenses)
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