petiole

(noun)

stalk that extends from the stem to the base of the leaf

Related Terms

  • stipule
  • axillary bud
  • internode
  • node
  • lamina

Examples of petiole in the following topics:

  • Leaf Structure and Arrangment

    • Some leaves are attached to the plant stem by a petiole.
    • Leaves that do not have a petiole and are directly attached to the plant stem are called sessile leaves.
    • Leaves also have stipules, small green appendages usually found at the base of the petiole.
    • Petioles, stipules, veins, and a midrib are all essential structures of a leaf.
  • Functions of Stems

    • The stalk that extends from the stem to the base of the leaf is the petiole.
    • The petiole is the stalk connecting the leaf to the stem.
  • Types of Leaf Forms

    • A palmately compound leaf has its leaflets radiating outwards from the end of the petiole, like fingers off the palm of a hand.
    • (b) In palmately compound leaves, such as those of the horse chestnut (Aesculus hippocastanum), the leaflets branch from the petiole.
  • Plant Responses to Wind and Touch

    • A tendril is a specialized stem, leaf, or petiole with a threadlike shape that is used by climbing plants for support.The meristematic region of tendrils is very touch sensitive; light touch will evoke a quick coiling response.
  • Pressure, Gravity, and Matric Potential

    • This increases water potential between the water in the the petiole (base of the leaf) and in the leaf, thereby encouraging water to flow from the petiole into the leaf.
  • Viroids

    • Symptoms in the leaf are uncommon, but include bleached veins and petioles.
Subjects
  • Accounting
  • Algebra
  • Art History
  • Biology
  • Business
  • Calculus
  • Chemistry
  • Communications
  • Economics
  • Finance
  • Management
  • Marketing
  • Microbiology
  • Physics
  • Physiology
  • Political Science
  • Psychology
  • Sociology
  • Statistics
  • U.S. History
  • World History
  • Writing

Except where noted, content and user contributions on this site are licensed under CC BY-SA 4.0 with attribution required.