I get an abnormal result in my study. Using a closed system, I have injected 5% d'O2 in a bocal with a finger of banana. After calculating my respiration rate, bananas seem to respire at a level of 2,24mmol/kg/h more than with an ambiant atmosphere. I don't know how explaining that; may be it is because the atmosphere with low oxygene level is too stressfull. Do you have others ideas ?
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I would say it is a response to the stress of low O2 level. When fruit are packed in imperforated polyethylene bag (for instance) CO2 will increase and O2 decrease with fruit fermentation to follow. As a result the apparent beneficial effect of Modified atmosphere can be negated. This is mainly because imperforated bags cause excessive depletion of O2 in the bags and hence anaerobic respiration. So try to use perforated bags that allow release of extra CO2 while inhibiting O2 intake.
So anaerobic respiration is the second step of the stress induced by low O2 level. Because my measures correspond to a respiration rate of 2,24 mmol/kg/h of consumed oxygene.
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