Buttercup stem. Coloured scanning electron micrograph (SEM) of a section through the stem of a buttercup (Ranunculus sp.) plant. At centre right is a spiral of lignin,a woody substance that wraps around a xylem vessel to strengthen it. Xylem vessels transport water and mineral nutrients around the plant | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Power And Syred |
Taille de l’image : | 4720 px × 3730 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |