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Storage organ
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<p>A storage organ is a part of a plant specifically modified for storage of energy (generally in the form of <a href="/facts/Carbohydrate/Geuuzxsf">carbohydrates</a>) or water. Storage organs often grow underground, where they are better protected from attack by <a href="/facts/Herbivore/me4YFdQA">herbivores</a>. Plants that have an underground storage organ are called geophytes in the <a href="/facts/Raunki%C3%A6r_plant_life-form/gUExXEvH">Raunkiær plant life-form classification system</a>. Storage organs often, but not always, act as <a href="/facts/Perennating_organ/v4VX4Hx7">perennating organs</a> which enable plants to survive adverse conditions (such as cold, excessive heat, lack of light or drought). </p>