Holly has been traditionally used as a Christmas decoration in many western countries. Being an evergreen plant, holly carries out photosynthesis throughout the year. In the cold winter months its leaves adapt to the lower temperatures by reducing their yield of photosynthesis. Interestingly the efficiency of photosynthesis follows an opposite trend to the quantum yield of fluorescence from chlorophyll in the leaves.
We are lucky to have some holly just outside our factory in Scotland which makes us feel Christmassy all year round. Taking advantage of this we have measured the fluorescence quantum yield of its leaves as a function of temperature, using an FLS1000 with a Cryosphere accessory. The results give information on the photosynthesis process in holly and how it adapts to temperature changes.
Temperature-Dependent Quantum Yield of Fluorescence from Plant Leaves
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