page 28
FACTORS AFFECTING RESPIRATION
Tissue Age -young tissue has higher respiration than older tissue
Ripening
Fruit
and
Climacteric
Rise
-respiration increases when a fruit ripens.
Temperature -respiration decreases when temperature decreases.
-respiration ceases at about freezing temperatures (32 F)
-increasing temperature increases respiration, until temperature gets too high, 
  then respiration decreases when tissue deteriorates.
Oxygen -respiration decreases when oxygen decreases.
-under no oxygen, anaerobic respiration occurs.
Carbon dioxide -respiration decreases when carbon dioxide increases
Controlled
Atmosphere
Storage
-high CO2 (approx. 2-5%)
-low O2 (approx. 3%)
-low temperature (approx. 32 F)
-high humidity (approx. 90%)
-ethylene removed (scrubbed)
Hypobaric
Storage
-similar to controlled atmosphere storage, plus has low pressure (light vacuum) to
reduce 02 and remove ethylene from the container and from inside the plant tissue.
Damage -wounded, damaged or infected tissue has higher respiration than healthy tissue
Water
content
-dry tissue has decreased respiration; for example, dry seeds