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MODIFIED PLANT FOOD STORAGE ORGANS
3.3.2 MODIFIED PLANT FOOD STORAGE ORGANS
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One example of a root, stem and leaf modified as a food storage organ
Need to know One example of a root, stem and leaf modified as a food storage organ
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ROOT MODIFIED TO STORE FOOD
Example Carrot Dicot plants, e.g. carrots produce one main tap root This root becomes fleshy and swollen with stored starch
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STEM MODIFIED TO STORE FOOD
Potatoe Example Potatoes have an underground stem system The tips of these stems become swollen with stored starch The swollen tips are called Tubers
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Potatoe Tuber….a swollen stem tip
Apical Bud Lenticel Lateral Bud
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LEAF MODIFIED TO STORE FOOD
Onion bulb Example Is a reduced underground stem With fleshy leaves swollen with stored starch Surrounding a central apical bud
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Onion Bulb Dry Scaley leaves Fleshy leaves Apical Bud Reduced stem
Adventitious roots
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Learning Check Give an example of a stem modified to store food.
Give an example of a root modified to store food. In what form is the food stored ? What is a bulb ?
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See also section 3.6.1 Vegetative reproduction in plants
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