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Epidermis strip with resin duct in a pine needle

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Legend:

cuticula
3  sclerenchym
resin duct
5  chlorenchym
2  epidermis

 
English name: Pine
Scientific name: Pinus sp.
Familia: Pinaceae
Classis: Coniferopsida
Phylum: Gymnospermae
Regnum: Plantae
Needles of pine have small epidermis cells. However, these have a thick wall and a very thick cuticle that contains cutin. The needle contains resin ducts that are surrounded by sclerenchyma. The resin serves as protection against predators.

http://www.vcbio.science.ru.nl/en/image-gallery/show/labels/PL0258/print/

last modified: 5 Jun 2014