Zea leaf, LM

Numéro d’image : 13444679
Zea leaf, LM
Zea leaf. Light micrograph (LM) of a transverse section through the leaf (pinna) of a Zea ( corn). Zea is a genus of flowering plants in the grass family. The best-known species is Z. mays, one of the most important crops for human societies throughout much of the world. The spongy mesophyll has air spaces for gas exchange and produces carbohydrates by photosynthesis. The upper and lower cuticle protect the leaf from water, sealing water inside and preventing excess rainwater from entering. The upper and lower epidermis produce the cuticle and protect the leaf from herbivores and parasites. The xylem transports water into the leaf while the phloem begins the sugar transport down to the roots. The guard cells open and close the stoma, which is the small air space between them. In monocot leaf, both small and large parallel vascular bundles are present. Magnification: x15 at 10 cm. wide.
Licence : Droits gérés
Crédit: Science Photo Library / Gschmeissner, Steve
Taille de l’image : 5120 px × 3414 px
Model Release : Non requis
Restrictions : -

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