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Cool C^sub 4^ Photosynthesis: Pyruvate P^sub i^ Dikinase Expression and Activity Corresponds to the Exceptional Cold Tolerance of Carbon Assimilation in Miscanthus × giganteus1,2[W][OA]
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Plant Physiology
- Article date:
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September 1, 2008
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Copyright informationCopyright American Society of Plant Biologists Sep 2008. Provided by ProQuest LLC. (Hide copyright information)
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The bioenergy feedstock grass Miscanthus à giganteus is exceptional among C^sub 4^ species for its high productivity in cold climates. It can maintain photosynthetically active leaves at temperatures 6°C below the minimum for maize (Zea mays), which allows it a longer growing season in cool climates. Understanding the basis for this difference between these two closely related plants may be critical in adapting maize to colder weather. When M. à giganteus and maize grown at 25°C were transferred to 14°C, light-saturated CO2 assimilation and quantum yield of photosystem II declined by 30% and 40%, respectively, in the first 48 h in these two species. The decline continued in maize but ...
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