![](https://nthumb.tpgimages.com/mid2_com_img/28103/24041/TOP22239565.jpg)
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.
px | px | dpi | = | cm | x | cm | = | MB |
Details
Creative#:
TOP22239565
Source:
達志影像
Authorization Type:
RM
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須由TPG 完整授權
Model Release:
N/A
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No
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No
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