Department of Zoology, University of Adelaide, 5000, Adelaide, S.A., Australia.
Planta. 1984 May;161(3):229-32. doi: 10.1007/BF00982917.
During peak thermogenesis of anthesis, high rates of respiration by the sterile male florets on the spadix ofPhilodendron selloum significantly reduce the oxygen tension (PO 2) and raise CO2 tension between the florets. Nevertheless, respiration is not limited by the availability of O2 under natural conditions. At experimental PO 2 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.
在开花高峰期，百合科蔓绿绒属雄花穗上无菌雄花的呼吸作用非常旺盛，导致小花之间的氧气分压（PO 2）显著降低，二氧化碳分压升高。然而，在自然条件下，呼吸作用并不受氧气供应的限制。然而，在实验中当 PO 2 低于约 17 kPa 时，小花的耗氧量开始减少。呼吸交换比为 0.83，表明主要能源不是淀粉，而可能是脂质。
