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  • 1
    Electronic Resource
    Electronic Resource
    Statistical properties of chlorophyll fluorescence induction parameters (1998)
    Springer
    Photosynthetica 35 (1998), S. 121-127 
    Details
    ISSN: 1573-9058
    Keywords: Gaussian distribution ; leaf age ; Triticum aestivum ; wheat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Parameters of the fast chlorophyll (Chl) fluorescence induction (the O-J-I-P curve) of plants of winter wheat grown in the field canopy were statistically tested for Gaussian distribution. Five different statistical methods showed that the obtained values did not obey the Gaussian distribution law. The presentation of the parameters with the help of the mean and standard deviation masks the information about statistical properties of the values. Thus, we recommend to present the parameters by means of median, quartiles, and minimum and maximum values rather than by means of the mean and standard deviation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006886202444
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  • 2
    Electronic Resource
    Electronic Resource
    Decrease of Fluorescence Intensity After the K Step in Chlorophyll a Fluorescence Induction is Suppressed by Electron Acceptors and Donors to Photosystem 2 (1999)
    Springer
    Photosynthetica 37 (1999), S. 255-265 
    Details
    ISSN: 1573-9058
    Keywords: charge recombination ; fluorescence quenching ; high temperature stress ; Pisum sativum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Chlorophyll a fluorescence induction measured by a fluorometer with a high temperature stressed plant material shows a new K step which is a clear peak due to fast fluorescence rise and subsequent decrease of fluorescence intensity. We focused on an explanation of the decrease of fluorescence after the K step using artificial electron acceptors and donors to photosystem 2 (PS2). Addition of the artificial electron acceptors or donors suppressed the decrease of fluorescence after the K step. We suggest that the decrease mainly reflects (by more than 81 %) an energy loss process in the reaction centre of PS2 which is most probably a nonradiative charge recombination between P680+ (oxidised primary electron donor in PS2) and a negative charge stored on either Pheo− or QA − (reduced primary electron acceptor of PS2 and reduced primary quinone electron acceptor of PS2, respectively). We suggest that the energy loss process is only possible when the inhibition of both the donor and the acceptor sides of PS2 occurs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007112222952
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    Paper (German National Licenses)
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