Leaves ‘keep their cool’

This is a bit of an old one, but this story featured on the Nature website by Heidi Ledford about how leaves regulate their temperature in order to maximise their metabolism is worth a mention on these pages:

Whether growing in the heat of Puerto Rico or in the icy chill of northern Canada, tree leaves are able to buffer against the outside temperature, new research has found.

A survey of 39 North American tree species over an area spanning 50° of latitude has shown that plants protect one of their most important functions – photosynthesis – by maintaining average leaf temperatures at around 21 °C, regardless of the weather.

Source: Nature.com

Date: 11/06/2008


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