SEM of vascular tissue of tobacco leaf

Bildnummer 11537171
SEM of vascular tissue of tobacco leaf
Tobacco. Coloured scanning electron micrograph (SEM) of vascular leaf fragments in cigarette tobacco. The walls of the xylem vessels seen here are strengthened with cellulose and lignin in annular and reticulate thickenings (brown). These vessels are responsible for the upward translocation of water in the living plant. The tobacco plant,Nicotiana tabacum,is cultivated in warm dry climates. The leaves are cured and matured in storage for two to three years before being used in cigarettes,cigars and snuff. The leaves also yield the alkaloid nicotine,one of the most powerful poisons known,and addictive to humans. Magnification: x520 at 5x7cm size. x740 at 8x6ins,x395 at 10x7cm master size
Lizenzart: Lizenzpflichtig
Credit: Science Photo Library / Power And Syred
Bildgröße: 3638 px × 2480 px
Modell-Rechte: nicht erforderlich
Eigentums-Rechte: nicht erforderlich
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