Subtopic: Controlled and modified atmosphere storage
Question Statement:
In Controlled Atmosphere (CA) storage of fresh fruits like apples, which environmental gas composition adjustments are typically maintained?
Options:
(A) Oxygen ($O_2$) concentration is lowered from $21\%$ to approximately $2 - 3\%$
(B) Carbon dioxide ($CO_2$) concentration is elevated to approximately $1 - 5\%$
(C) Relative humidity is maintained high ($90 - 95\%$) to suppress transpiration desiccation
(D) Oxygen concentration is increased above $50\%$ to stimulate aerobic respiration
Answer Key:
A, B, C
Step-by-Step Solution & Explanation
- A is correct: Lowering $O_2$ suppresses cellular respiration and senescence.
- B is correct: Moderate elevation of $CO_2$ inhibits ethylene synthesis and ripening.
- C is correct: High RH minimizes moisture loss and shriveling.
- D is incorrect: High oxygen accelerates decay and rapid senescence.