Sunflower petal and pollen, ESEM

Sunflower petal and pollen, ESEM

C032/4441 Rights Managed

Request low-res file

530 pixels on longest edge, unwatermarked

Request/Download high-res file

Uncompressed file size: 24.9MB

Downloadable file size: 1.6MB

Price image Pricing

Please login to use the price calculator


Credit: DENNIS KUNKEL MICROSCOPY/SCIENCE PHOTO LIBRARY

Caption: Sunflower petal with two pollen grains (Helianthus sp.), coloured environmental scanning electron micrograph (ESEM). The outer wall (exine) has many small spiky projections. The pollen gets caught in the body hairs of insects visiting the flower. Cross pollination occurs when insects fly to another similar flower and pollen is left behind. Pollen contains the male reproductive cells of a plant. When the pollen grain, containing the male gametes, lands on the stigma of a flower, it germinates. A pollen tube grows out from the germinal pore, down through the stigma, to the ovary. The male nuclei pass down the tube, fertilize the ovules and seed is formed. Humans can also be allergic to daisy pollen. Magnification: x365 when shortest axis printed at 25 millimetres.

Release details: Model release not required. Property release not required.

Keywords: 96788a, allergen, allergenic pollen, allergic, asteraceae, asterales, astereae, asterid, asterids, capitula, capitula flower, capitula flowers, compositae, composite flower, cross pollination, daisy flower, daisy pollen, esem, eudicot, eudicots, exine, flower petal, flower petals, heliantheae, helianthoideae, helianthus annuus, plant pollen, plant reproduction, plants, pollen wall, sun flower, sun flower pollen, sunflower, sunflower petal, sunflower pollen

Licence fees: A licence fee will be charged for any media (low or high resolution) used in your project.