Rosebay Willowherb in autumn.

Numéro d’image : 12395367
Rosebay Willowherb in autumn.
Occasionally, if autumn is bright, dry and cold, but not frosty, the foliage of plants like the rosebay willowherb - Chamerion angustifolium - will turn bright red. At the end of summer the plant will recover the chlorophylls ( green) from the foliage revealing the carotinoids ( yellow) and anthyocyanins (red). These help to block excess sunlight energy from damaging the leaf and, in dry weather, the leaf sugars become concentrated and produce more anthocyanin producing even stronger colours. In damp, dull autumns the plant will have shed its leaves before the chlorophyll can be recovered. Rosebay willowherb produces up to 20, 000 parachuted seeds that will be carried by the wind for some distance from its parent. Reykjavik Iceland.
Licence : Droits gérés
Crédit: Science Photo Library / Chillmaid, Martyn F.
Taille de l’image : 5760 px × 3840 px
Model Release : Non requis
Property Release : Non requis
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