Monday 9 November 2015

Orange is the new...green?!

Whilst sitting in my 'Food Product, Manufacture & Supply' lecture last week, our knowledgeable and  gnome sized lecturer Yunus shocked us all when he told us oranges are often dyed to become that golden hue. "Why are oranges called orange then?" exclaimed one of the other students. I thought this was a rather good point and so started my investigation to get to the root of the matter.

What came first, the colour orange or the orange?


The fruit came before the colour. The word “orange” derives from the Arabic naranj and arrived in English as “narange” in the 14th century, gradually losing the initial “n”. This process is called wrong word division and also left us with apron (from naperon) and umpire (from noumpere). Orange was first used as the name for a colour in 1542 (Oldfield and Mitchinson, 2011). 

 The Arabs brought what we now call the Seville orange, or bitter orange, to Sicily in the Middle Ages, and from Sicily it was introduced to the rest of Europe. In the 16th century the Portuguese brought the sweet orange from China, and gave us the fruit which we now know simply as the orange, at first distinguished as a China orange (Oxford Dictionary, not dated).

 Oranges are a subtropical fruit, whose colour depends on where it is grown. In more temperate climes, its green skin turns orange when the weather cools; but in countries where it’s always hot, the chlorophyll is preserved and the fruit stays green (Oldfield and Mitchinson, 2011).  

 The orange fruits are often picked unripe, to develop throughout transport to their final destination. However, green oranges do not indicate an unripe fruit. The greenness is a result of chlorophyll present within the oranges skin. It is only when the fruit is exposed to cold temperatures that the chlorophyll will diminish, leaving the bright golden hue to radiate through.    

Because consumers have come to believe that orange indicates edible, supermarkets have some crafty tricks up their sleeve to transform your fruit. As mentioned earlier, they may shock the fruit with cold temperatures. Other methods include subjecting the fruit to ethylene gas which breaks down chlorophyll. Orange skins can even be dyed if they are not intended or used for processing and meet the maturity standards.

It seemed the history of the fruit was a no-brainer, but nothing is ever straight forward! So don't be put off by green orange residing in your fruit bowl, it's perfectly good to munch on now probably.

References.
Oldfield, M. and Mitchinson, J. 2011. QI: Quite interesting facts about orange. Telegraph. Available from: http://www.telegraph.co.uk/men/the-filter/qi/8345477/QI-Quite-interesting-facts-about-orange.html
Oxford Dictionary. Not dated. Available from: http://www.oxforddictionaries.com/definition/english/orange