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Science
THE LIVING WORLD
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PROGRAMME INFO
Sunday 06:35-07:00
The Living WorldÌýis a gentle weekend natural history programme, which aims to broadcast the best, most intimate encounters with British wildlife.
nhuradio@bbc.co.uk
LISTEN AGAINListenÌý25min
Listen toÌý21 March
PRESENTER
BRETT WESTWOOD
Brett Westwood
PROGRAMME DETAILS
SundayÌý21 MarchÌý2004
Tree buds in winter
Tree buds in winterÌý

The Stirring Trees

Sticky horse chestnut buds and the furry pussy willow are childhood memories from the school nature table.ÌýTheyÌýmay be fascinating to us,ÌýbutÌýbudsÌýare vitally important for trees.ÌýSuperbly designed, these intricate packages help ensureÌýthat the new growth of leaves survive the winter without suffering fromÌýfrostÌýor insect damage.Ìý

The leaves will have formed in the late autumn and sit beautifully folded within the bud waiting for warming temperatures and longer daylength whichÌýare the signals for them to emerge.Ìý Some trees,Ìýlike hawthorn and beech,Ìýalso release chemicals which ensure the leaves emerge in the Spring as these chemicals get gradually broken down by theÌýlow temperatures of winter.Ìý

The intricate folding of the hornbeam'sÌýleaves withinÌýits buds have even been studied by scientists to find out how toÌýfold and squeeze things into small packages without damaging them.Ìý
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