Respiratory gas exchange during thermogenesis inPhilodendron selloum Koch
lipid respiration, Philodendron, respiratory exchange ratio, spadix, thermogenesis
During peak thermogenesis of anthesis, high rates of respiration by the sterile male florets on the spadix of Philodendron selloum significantly reduce the oxygen tension (PO2) and raise CO2 tension between the florets. Nevertheless, respiration is not limited by the availability of O2 under natural conditions. At experimental PO2 below about 17 kPa, however, florets begin to show decreased O2 consumption. A respiratory exchange ratio of 0.83 indicates that the major energy source is not starch, but is probably lipid.
Seymour, Roger S., M. Christopher Barnhart, and George A. Bartholomew. "Respiratory gas exchange during thermogenesis inPhilodendron selloum Koch." Planta 161, no. 3 (1984): 229-232.
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