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  • 1
    Electronic Resource
    Electronic Resource
    Rubisco specificity factor tends to be larger in plant species from drier habitats and in species with persistent leaves (2005)
    Oxford, UK : Blackwell Science Ltd
    Plant, cell & environment 28 (2005), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The specificity factor of Rubisco is a measure of the relative capacities of the enzyme to catalyse carboxylation and oxygenation of ribulose 1,5-bisphosphate and hence to control the relative rates of photosynthetic carbon assimilation and photorespiration. Specificity factors of purified Rubisco from 24 species of C3 plants found in diverse habitats with a wide range of environmental growth limitations by both water availability and temperature in the Balearic Islands were measured at 25 °C. The results suggest that specificity factors are more dependent on environmental pressure than on phylogenetic factors. Irrespective of phylogenetic relationships, higher specificity factors were found in species characteristically growing in dryer environments and in species that are hemideciduous or evergreen. Effects of temperature on specificity factor of the purified enzyme from 14 species were consistent with the concept that higher specificity factors were associated with an increase in the activation energy for oxygenation compared to carboxylation of the 2,3-enediolate of RuBP to the respective transition state intermediates. The results are discussed in terms of selection pressures leading to the differences in specificity factors and the value of the observations for identifying useful genetic manipulation to change Rubisco polypeptide subunits.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.2005.01300.x
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  • 2
    Electronic Resource
    Electronic Resource
    The impact of climatic change (1979)
    [s.l.] : Nature Publishing Group
    Nature 280 (1979), S. 634-635 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] OUR knowledge of fluctuations of climate has exhibited a precocious flowering in the past 5 years and the time has come to consolidate the progress already made along many different paths and to point a way forward. This was the goal that 250 climatologists and historians from 33 countries set ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/280634a0
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  • 3
    Electronic Resource
    Electronic Resource
    Potential impact of climate change on world food supply (1994)
    [s.l.] : Nature Publishing Group
    Nature 367 (1994), S. 133-138 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A global assessment of the potential impact of climate change on world food supply suggests that doubling of the atmospheric carbon dioxide concentration will lead to only a small decrease in global crop production. But developing countries are likely to bear the brunt of the problem, and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/367133a0
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