alb3797950
ragweed pollen
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Titre: ragweed pollen
Légende: Voir la traduction automatique
Ragweed pollen. Colored scanning electron micrograph (SEM) of pollen grains (pink) on the stigma (green) of a ragweed plant (Ambrosia sp.). These spiky pollen grains contain the male sex cells of the plant. The multi-lobed stigma, the surface of the flower's female sex organ, the carpel, is where the pollen germinates. Ambrosia sp. is a daisy-like flower which grows in bare and waste ground. Its pollen is wind-borne and released in great quantities for cross-pollination. Ambrosia sp. pollen acts as an allergen causing hay fever (allergic rhinitis or pollinosis) in susceptible individuals. Magnification: x150 at 5x7cm size. Magnification: x75 at 35mm size.
Ragweed pollen. Colored scanning electron micrograph (SEM) of pollen grains (pink) on the stigma (green) of a ragweed plant (Ambrosia sp.). These spiky pollen grains contain the male sex cells of the plant. The multi-lobed stigma, the surface of the flower's female sex organ, the carpel, is where the pollen germinates. Ambrosia sp. is a daisy-like flower which grows in bare and waste ground. Its pollen is wind-borne and released in great quantities for cross-pollination. Ambrosia sp. pollen acts as an allergen causing hay fever (allergic rhinitis or pollinosis) in susceptible individuals. Magnification: x150 at 5x7cm size. Magnification: x75 at 35mm size.
Reportage: SEM, Microscopico electrónico de barrido
Crédit: Album / Science Source / Biophoto Associates
Autorisations: ? Autorisation de modèle: Non - ? Autorisation de propriété: Non
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Taille de l'image: 4531 × 2991 px | 38.8 MB
Taille d'impression: 38.4 × 25.3 cm | 1783.9 × 1177.6 in (300 dpi)
Mots clés: ACTION (FINANCE) • AGRANDISSEMENT • BIOLOGIE • BOTANIQUE • GROSSISSEMENT • MEDICAL • PLANTE • ROSE (COULEUR) • ROSEE • VEGETAUX
