In summary, bananas displayed green-ripening whilst plantains
exhibited normal ripening when the fruits ripened in
20% CO2 at 20°C, and the stay-green ripening of bananas
might be caused by the delayed cell senescence in the
green peel tissue, not by the expression reduction of Chl
degradation genes, different from the mechanisms leading
to the green-ripening of the fruit at high temperatures. The
normal fruit softening in the green-ripening bananas might
be related to the anaerobic respiration strengthened by the
high CO2.