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The petiole is a stalk that attaches a leaf to the plant stem. In petiolate leaves the leaf stalk may be long (as in the leaves of celery and rhubarb), or short (for example basil). When completely absent, the blade attaches directly to the stem and is said to be sessile.
7 lut 2022 · Our results showed that leaf area has the strongest influence on petiole anatomical traits, more than temperature, precipitation and plant height, emphasizing the supportive and mechanical role of this part of the leaf. Petioles tend to be longer and have a circular outline in larger leaves.
Leaves attached to stems by stalks (known as petioles) are called petiolate, and if attached directly to the stem with no petiole they are called sessile. [ 20 ] Ferns have fronds .
24 sty 2020 · All the leaves in the crown were cut by cutting the petiole as close as possible to its insertion point with the stem and placed immediately in plastic bags within coolers. One to five fully expanded leaves per tree—hereafter called A-leaves—were kept for the anatomical studies.
17 gru 2016 · Pedicle – The part of a plant that is attached to and supporting a single flower. Lamina – The blade-shaped part of a leaf where transpiration and photosynthesis take place. Stipule – A small attachment that can be found at the base of a petiole, resembling a leaf. Quiz. 1. Which of the following is true of a petiole? A. It is also called a stem.
The stalk that attaches the leaf lamina to the stem. The point of attachment is often strengthened by a widening of the base of the petiole. Some leaves (sessile leaves) lack a petiole and are joined to the stem at the base of the lamina. Sessile leaves are characteristic of most monocotyledons.
Leaves that do not have a petiole and are directly attached to the plant stem are called sessile (apetiolate) leaves (Figure \(\PageIndex{4}\)). In a special type of sessile leaves called perfoliate leaves, the stem passes through the center of the blade (Figure \(\PageIndex{4}\)).
