A leaf is responsible for:
- photsynthesis
- food production
- transforming light energy to chemical energy
- cellular respiration
Classifications of Leaf
A. Phyllotaxy - the fundamental study of leaf arrangement.
- Opposite - 2 leaves per node
- Alternate - one leaf per node
- Whorled - multiple leaves surrounding the node
- Spiral - leaves swirl around the plant.
*Node - attachment site of the leaf
B. Number of Cotyledon
- Monocot - has one cotyledon. It has a parallel vein leaf and scattered vascular vessel
- Dicot - has two cotyledons. It has a netted vein leaf and ring form vascular vessel
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| Monocot: left, parallel vein leaf; right, scattered vascular vessel |
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| Dicot: left, netted vein leaf; right, ring form vascular vessel |
- Vascular Tissues are the transport vessels of plants
- Xylem -upward; water and minerals
- Phloem -downward; nutrients
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