The EXTERNAL Structure of PLANTS

External Structure of the Plant – Parts of the plant on the outside. The Root Types of Root Systems Functions of the Root System Specialized Root Systems

AXILLARY BUD TERMINAL BUD FLOWER FRUIT NODE SHOOT SYSTEM NODE INTER- NODE NODE LEAF STEM LATERAL OR SIDE ROOT ROOT SYSTEM MAIN ROOT

ground and the Root System The Shoot System is found ground and the Root System is found ground. ABOVE BELOW or UNDER

Types of Root System All Grasses Looks like a tangled mass of roots Examples of plants With this root system are Banana Coconut Rice Corn Sugar Cane All Grasses

Tap Roots Have a large main central root Have many branching roots Go deep in the soil Examples of plants : Large trees e.g. mango, avocado Shrubs e.g. tomato, peppers

Aerial Roots Plant attaches itself to tree branch or telephone wire Roots hang down in mid-air and absorb water from rainfall Examples : Wild Pine Some Orchids

Specialized Roots STILT ROOTS e.g. Mangrove

PROP ROOTS e.g. Corn

ADVENTITIOUS Roots - Grow from unusual places on plants such as - Stems, leaves and even fruits

Functions of Roots Roots : - anchor plants firmly in the ground - absorb water and minerals from the soil - of some plants, can store starch - of some plants can be used to grow a new plant

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