Susan Martin 7th grade Science Pollination Methods Susan Martin 7th grade Science
To my darlings…. You will just look at these pictures and see some of the things we have been talking about. If you act CRA-CRA Mrs. Cami will make you write all the slides! ACasey
Pollination Transfer of pollen grains (male-sperm) to the female part (stigma) of a seed plant by agents such as gravity, water, wind, and animals
Some flowers are JUST male OR female The Alder is monoecious. Shown here: maturing male flower catkins on right, last year's female catkins on left (top right) male flower enlarged, showing stamens with pollen and reduced, sterile stigma; (below) shoot with flowers from female plant; (lower right) female flower enlarged, showing stigma and reduced, sterile stamens with no pollen
Function of a Flower To attract pollinators by colorful petals, scent, nectar, markings and pollen
Pollination Methods- 1. Wind/Gravity angiosperms& gymnosperms No bright colors, special odors, or nectar Most have no petals so Stamens and stigmas exposed to air Large amount of pollen lightweight, easily airborne Usually trees & grasses
2. water Pollen floats on the water’s surface drifting until it contacts flowers Very rare, waterweeds and pondweeds
3. Animals A. Insects Bee- usually yellows or blues, have nectar and/or pollen Butterfly: usually pinks or purples, scented, may have landing area, lots of nectar with little pollen, nectar guides & long tubes for butterfly tongues
Animals cont. Insects continued Moths: usually white, blooms at night, strong sweet scents Beetles: may be spicy, fruity, or smell like decay Fly: Can have nectar or pollen, or smell like decay
Animals cont. B. Birds- greatest nectar specialization, odorless, red or orange flowers, long tubes for hummingbirds C. Bats: large, white, strong odor, open at night, offer nectar
Resources http://www.life.umd.edu/CBMG/faculty/Moctezuma/BSCI124/Lectures/PPT/Lec13_Pollination.ppt http://www.fs.fed.us/wildflowers/pollinators/bees.shtml http://www.pdphoto.org/PictureHome.php