What is the petiole of a leaf?

The petiole of a leaf is the stalk that connects the leaf blade (lamina) to the stem of the plant.

• It helps support the leaf blade and positions it for maximum sunlight exposure.
• The petiole also transports water, nutrients, and food between the stem and the leaf through vascular tissues (xylem and phloem).
• Some leaves (like in sesame, mango) have a distinct petiole, while in sessile leaves (like wheat, maize), the petiole is absent and the leaf blade attaches directly to the stem.

In short: The petiole is the leaf stalk that acts as a bridge between the stem and the leaf blade