Flowering Plants

BIOL 1407

Flowering Plants

• Seed plants• Ovules are

enclosed in an ovary

• Ovary fruit around seeds

• Photo Credit: BIOL 1407 student, Austin Nature Center field trip, 2006

Flowers

• Reproductive Structures– Attract animal

pollinators• Photo Credit: Pam Wolfe,

Georgetown River Walk 2008

Flowers• Female

structures = megasporophylls

• Male structures = microsporophylls

• Photo Credit: Pam Wolfe, Zilker Botanical Gardens 2008

Flowers

• Reproductive structures surrounded by modified leaves

• Photo Credit: Pam Wolfe, Zilker Botanical Gardens 2008

Photo Credit: ACC Field Biology Student, 2005

Photo Credit: Courtesy of Luc Viatour @ http://www.lucnix.be

Photo Credit: ACC Field Biology Student, 2005

Flower Pollination

• Animal Pollinators– Insects– Bats– Birds– Other mammals

(sugar gliders, mouse lemurs)

• Wind Pollination• Water Pollination• Photo Credit: Courtesy of Luc Viatour @ http://www.lucnix.be

Photo Credit: Butterfly – Courtesy of Luc Viatour @ http://www.lucnix.beStapelia – Courtesy of ChasMTx @ http://www.ubcbotanicalgarden.org/potd/2005/11/stapelia_gigantea.php

Fruits

• Mature ovary• Ovary forms wall

around seeds• Photo Credit: Courtesy of Luc Viatour

@ http://www.lucnix.be

Photo Credit: Courtesy of Luc Viatour @ http://www.lucnix.be

Photo Credit: Courtesy of Luc Viatour @ http://www.lucnix.be

Seed Dispersal

• Seed Dispersal– Animal dispersal– Wind dispersal– Water dispersal– Mechanical

dispersal• Photo Credit: Mexican buckeye fruit, BIOL

1407 Student, Austin Nature Center field trip 2006

Photo Credit: Courtesy of Luc Viatour @ http://www.lucnix.be

Photo Credit: Blue Tit Photo – Courtesy of Luc Viatour @ http://www.lucnix.be

• Pollination• Pollen germination• Pollen tube growth• Double fertilization

Angiosperm Seeds

• Zygote Embryo

• Triploid cell Endosperm (food supply)

• Integuments Seed coat

Corn Seeds

Bean Seeds

Question: Where is the endosperm?

Cotyledon stays within kernel nutrients from endosperm to seedling

Evolution

Basal Angiosperms

Monocots

Magnoliids

Eudicots

Photo Credits: ACC Field Biology Student, 2005

The End

Unless otherwise specified, all images in this presentation came from:

Campbell, et al. 2008. Biology, 8th ed. Pearson Benjamin Cummings.