Gossypium spp.Cotton Anatomy

Jake Delheimer

IB 423

Portfolio Project

The Basics

• Dicot• Taproot with many

branch roots• Average 6 to 8

flowers per branch

http://encarta.msn.com/media_681500044/Cotton_Field_Uzbekistan.html

Cotton in History

• Found in the Indus River Valley around 3000 BC

• Major Use Began in India around 1500 BC

• Brought to the New World by Europeans, main product of Southern Agriculture in early 19th Centuryhttp://encarta.msn.com/media_461530270/American_Cotton_Plantation.html

Economics and Cotton

• Produced all over the world

• In 1998, the United States produced 13.23 million bales

• Texas produced just over 3 million of these bales

• Cotton Bowl played in Texas every year

The Tour

• Roots• Stems• Leaves• Floral

Root Whole Mounts

Left and Top Right 4X

Bottom Right 10X

Root Cap Longitudinal Section10X

Root Cross SectionRegion of Early Differentiation

10X

Rhizodermis

EndodermisPericycle

Cortex

Vascular Cylinder (Stele)

Root Cross Section Region of Early Differentiation

20X

Metaxylem

Protoxylem

Primary Phloem

Endodermis (Outer)Pericycle (Inner)

Root Cross SectionBranch Root

10XCortex

Branch Root

Pericycle

Stem Primary GrowthPhloroglucinol

4X and 20X

Open Collateral

PithCortexPrimary Xylem

Primary Phloem

Trichomes

Stem Secondary Growth4X and 10X

Phloroglucinol

Secondary Xylem Secondary PhloemAlternatingPhloem and Fibers

Cortex Pith

Stem Secondary GrowthCont.20X

AngularCollenchyma

Epidermis

Trichome

Leaf Gap and Trace4X and 10X

Leaf Traces Leaf Gap

Leaf Cross Section4X

Palisade Mesophyll

Spongy Mesohpyll Abaxial Side

Adaxial Side

Epidermis

XylemPhloem

Collenchyma

Trichome

Paradermal Section and Venation20X and 4X

AreoleVeins

Epidermal Replicas40X

Upper Lower

Anomocytic and Amphistomatic

Floral and Fruit Structures

Floral Meristem 30X

Stamen

Trichomes10X and 20X

Multicellular Stellate

Found all over plant.

References

• Richard Crang and Andrey Vassilyev. Plant Anatomy. • Katherine Esau. Anatomy of Seed Plants. 2nd Ed.• http://encarta.msn.com/• http://www-plb.ucdavis.edu/labs/rost/cotton/cothome.htm

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