PLANT PROPAGATED BY STEM TUBER
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Stem tuber is a modified stem for vegetative propagation.
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In a potato, some lateral branches are produced from the underground part of the stem which grow down in the soil.
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The tip of these branches are swollen since they store food.
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These tubers show the presence of nodes, internodes, scaly leaves and axillary buds.
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A stem tuber has many notches on its surface called “eye”.
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These eyes which are seen on the surface of the tuber represent nodes.
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Each “eye” is a node and is made up of one or more axillary buds subtended by a leaf scar.
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Under favourable conditions, axillary buds develop into new plants.
