Question

Explain with suitable examples the different types of phyllotaxy.

Answer 1

Different types of phyllotaxy:

• "Arrangement of leaves" on plant stem is termed as phyllotaxis or phyllotaxy in Botany.
• Phyllotaxy can be identified into three types opposite, alternate and whorled phyllotaxy.
• A single leaf arises from the node of the branch in alternate phyllotaxy, mostly found in sunflower and peepal.
• Two "leaves arising from the node" in the opposite direction of plants, it is called as opposite phyllotaxy, it usually found in jamun plants and guava.
• If three or more leaves arises from the node it is whorled phyllotaxy usually found in Alstonia.

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Answer 2

The pattern or arrangement of leaves on the stem or branch of a plant is Phyllotaxy.

Explanation:

Phyllotaxy is of different types Alternate, whorled, and opposite are the three kinds of phyllotaxy.

• In alternate phyllotaxy, the pattern of leaves are such that the individual leaves arise from each node on the stem of the plant. Example: sunflower, peepal, mustard, etc. Alternate phyllotaxy is also known as spiral phyllotaxy.

• In opposite phyllotaxy, the pattern is like a pairs of leaves which arise from each node. Example: guava and jamun.

• In whorled taxonomy, the pattern is like that there are three or more leaves arising from each node. Example: Alstonia and Nerium. Whorled phyllotaxy is also known as verticillate type.

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