Understanding the External Structure and Functions of Plant Roots
Explore the external structure of plants, focusing on the root system and its specialized types like tap roots, aerial roots, stilt roots, and prop roots. Learn about the functions of roots, including anchoring plants, absorbing water and minerals, and supporting new plant growth from various examples provided.
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Presentation Transcript
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 AXILLARY BUD BUD TERMINAL BUD TERMINAL BUD FLOWER FLOWER FRUIT FRUIT NODE NODE SHOOT SHOOT SYSTEM SYSTEM NODE NODE INTER INTER- - NODE NODE NODE NODE LEAF LEAF STEM STEM LATERAL LATERAL OR SIDE OR SIDE ROOT ROOT ROOT ROOT SYSTEM SYSTEM MAIN ROOT MAIN ROOT
The Shoot System is found ABOVE ground and the Root System is found BELOW or UNDER ground.
Types of Root System 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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