Explain about the growth of roots in onion bulbs
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The roots of onion bulb grows at the tip due to presence of dividing cells of meristematic tissues located only at these points. .Apical meristem is present at the growing tips of stems and roots and increases the length of the stem and the root.
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The onion plant has a fan of hollow bluish , green leaves and it's bulb at the base of the plant begins to swell when a certain day length is reached . the bulbs are composed of shortened ,compressed , underground stem surrounded by fleshy modified scale (leaves) that envelope a central bud at the tip of the stem.
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