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  1. Petiole, stem like part of the leaf holds the lamina facing toward the light i.e. connecting stems with leaf blades.
  2. A typical leaf consists of three main parts: leaf base, petiole and leaf lamina.
  3. Petiole holds the leaf blade to light.
  4. Long, thin and flexible petiole allows the leaf blades to flutter in wind, thus cooling the leaf and bringing fresh air to leaf surface.
  5. Petioles are also important as it affects light-harvesting ability of the leaf and transport of water and nutrients.
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