BISC 1112 Lecture 15: Lecture15 Plant Morphology

3 Pages

Biological Sciences
Course Code
BISC 1112
Robert P.Donaldson

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Plant Morphology ➔ Different tissues composed of different cell types ➔ Root system(below ground) and shoot system (above ground) ◆ Roots, Stems, Leaves ◆ Root ● Anchoring ● Absorbing minerals and water ● Storing carbohydrates ● Types ○ Taproot ○ Fibrous root ◆ Benefit grass if eaten not completely destroyed and gone ◆ Stem ● Have leaves serve as surface area for leaves to sprout ● Alternating system of nodes ● Apical buds at the top ○ Axillary buds on the sides laterally ◆ Leaves ● Main photosynthetic organ of most vascular plants ● Waxy cuticle covers absent in roots ● Epidermis has stomata ○ The holes transfer carbon dioxide and oxygen ● Modified leave types for various function ○ Spines ○ Tendrils (viney) ○ Reproductive leaves ○ Storage leaves (onion) ○ Trichomes ◆ Outgrowths of the shoot epidermis reduce water loss and insect defense ➔ Dermal ◆ Surrounding and protecting ◆ Non woody plants consists of epidermis ➔ Vascular ◆ Plants have indeterminate growth unlike humans who are determinate ◆ Xylem ● Conducts water and dissolved minerals ● Up from roots to the shoots ● Two types ○ Dead at maturity
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