Petiole

The petiole (pronounced /ˈpiːtiːoʊl/) is the stalk that attaches a leaf to the plant stem. It acts as a bridge, providing support and facilitating the transport of water, nutrients, and photosynthates between the leaf blade (lamina) and the stem. The petiole's structure varies across plant species, influencing leaf orientation and light capture efficiency. Features like length, shape, and presence of a pulvinus (a swollen base) contribute to this variability and adaptation to environmental conditions. It is a crucial structural and functional element for the overall health and productivity of the plant. Often a key element in leaf identification.

Petiole meaning with examples

• The botanist examined the petiole of the maple leaf, noting its long, slender form. Its length allowed the leaf blade to catch ample sunlight despite being partially shaded. The petiole's structure showed intricate vascular bundles providing for efficient transport of water and nutrients from the stem.
• When comparing different species, the petiole length can be a differentiating factor. One species might have a long petiole allowing for a fluttering in the wind. Others will have short petiole. This affects its sunlight exposure.
• The wind snapped several leaves, leaving the petiole stems attached to the branches. Despite the leaf loss, the plant was still healthy. The sturdy petiole base remained intact, showing the plant's structure.
• Scientists studying plant responses to drought examined the petiole, measuring its turgidity and thickness. petiole turgidity, being affected by water stress, and how that impacts the leaf blade.