Ask an expert: Why do bananas ripen fruit?
Why do bananas ripen other fruit? (Photo: Getty Images)
QUESTION: Why do bananas ripen other fruit?
Andrew Burns, Surry Hills, NSW
Dr Mala Gamage, CSIRO food scientist, says:
As they ripen, bananas, apples, kiwi fruit, tomatoes, figs, pears and some other fruits release a gaseous plant hormone known as ethylene. These 'climacteric' fruit, as they are called, will respond to ethylene in their environment and begin the ripening process. As they do so, they ripen other fruit (and perish flowers) around them.
Bananas are medium-level producers of ethylene compared with kiwi fruit, for example, which produce more. But because bananas are large, and often you'll have a bunch of them in your fruit bowl, they can appear to be the cause of other fruits ripening.
Ethylene gas is also used commercially to ripen bananas.
If you have a question for an expert, email it to email@example.com.
Ask an expert: Snakes in the sea?
Exploding watermelons pose hazard in China
Top 10 Aboriginal bush medicines
Australia's most poisonous plants
World's hottest chilli grown by Aussies