Plant Structure and Function “ He eats, shoots and leaves.” J.G. Mexal AGRO/HORT 100G.

Plant Structure and Function“He eats, shoots and leaves.”

J.G. Mexal

AGRO/HORT 100G

HORT Humor

Basic Plant Structure

Vocabulary

Germination– Hypogeous– Epigeous

Seed Structures• Seed • Seed coat • Cotyledon• Embryo• Endosperm• Hypocotyl• Radicle

• Epicotyl (plumule)

Parts of a seed

• Dicot

• Monocot

Seed coat

Epicotyl

Cotyledons

Hypocotyl

Seed coatEndosperm

Epicotyl

Hypocotyl

RadicleCotyledon

Seed Germination

Monocot Dicot

Hypogeous

Epigeous

Radicle

Vocabulary

Shoots• Evergreen/Deciduous• Annual/Biennial/Perennial• Xylem

(earlywood/latewood)• Phloem• Cambium• Meristem

Shoots• Leaf• Petiole• Axillary bud• Opposite• Alternate• Whorled• Node/Internode

Leaf Arrangement

Leaf Morphology

Leaf Morphology

Woody Plant Stem

Stern 2006

Woody Stem Structure

What are the critical parts of a tree?

Xylem (earlywood/latewood)

Bark

Cambium/Phloem

Wood Plant Stem

Stern 2006

Vocabulary

Reproduction/Fertilization• Cross pollination• Diploid• Fertilization• Gametes• Genes• Haploid• Hybrids• Pollination• Self pollination• Sexual reproduction• Zygote

Flowers• Perfect/Imperfect• Complete/Incomplete• Petals/Corolla• Sepals/Calyx• Stamen (anther & filament)• Pistil (stigma, style, ovary)

Flower Morphology

Structure: Flowers- missing parts

• Floral Parts Structure Reproduction• Sepals, Petals, Complete Perfect

Stamens, Pistil

• Sepals, Stamens, Incomplete Perfect

Pistil

• Sepals, Stamens Incomplete Imperfect

Structure- Compound Flower/ Sunflower

Structure- Flower- Compound Pistil/ Strawberry

Structure: Leaf Types

Structure: Leaf Venation

Structure: Leaf Arrangement

Structure: Flower Parts

Developing Root

Stern 2006

Root Cross Section