3.2. Green ripening of bananas induced by 20% CO2
can be classified as type A stay-green
Green ripening only occurs in bananas but not in plantains
during storage in 20% CO2
, indicating that the Chl degradation process of bananas might be more sensitive to high
CO2
than that of plantains. It is well known that responses
of horticultural commodities to CO2
can vary dramatically
among species, cultivars and strains, organ types, and
developmental stages. For example, above 2% of CO
leads to high CO2
injury for lettuce, whereas some berry
fruit, figs and cherimoya can tolerate 25% or even higher
(Watkins 2000). Elevated CO
inhibits browning of apple,
but injury occurs if the concentration of CO2
was too high,
and the optimum CO2
concentration for each cultivar is
different (Amissah et al. 00.
the tolerance of horticultural commodities to high CO2
are
complex and might be correlated to physical effects such as
skin thickness that influence gas exchange(Burton 1974)