The petiole is the region of a leaf that connects the leaf blade to the stem. The petiole is a critical structure that maintains the chemical and nutrients in a plant and plays a key role when deciduous trees lose their leaves in the fall.
What are three functions of petioles?
Petiole Function
Since leaves are responsible for fueling plants through photosynthesis, the petiole serves to transport the energy made in the leaf to the rest of the plant. It also serves to transport nutrients and water that are absorbed by the roots and passed up through the xylem, to the leaf.
What is the function of petiole Class 6?
Petiole holds holds the leaf blade to light. Long thin flexible petioles allow the leaf blade to flutter in wind, thereby cooling the leaf and bringing fresh air to the leaf surface.
What is the function of a petiole and lamina?
Leaves, which are the main site of photosynthesis, can differ considerably in their geometry, shape, size, and venation. In most leaves, the planar leaf blade (=lamina), which is often connected to the stem by a rod-shaped leaf stalk (=petiole), captures the light needed to produce energy-rich organic molecules.
What are petioles on trees?
Background and aims: Petioles are important plant organs connecting stems with leaf blades and affecting light-harvesting ability of the leaf as well as transport of water, nutrients and biochemical signals.
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What is called petiole?
The petiole is a stalk that attaches a leaf to the plant stem. … In plants with compound leaves, the leaflets are attached to a continuation of the petiole called the rachis. Each leaflet may be attached to the rachis by a short stalk called the petiolule.
What is the Stipule function?
Stipules are the lateral appendages which are found attached at the base of the leaf. Stipules mainly protect the bud and emerging young leaves. In some plants, stipules carry out photosynthesis. Some stipules become thorns, spines and protect the plant from damage by predators.
What is petiole in leaf Class 6?
Petiole is the stalk that supports a leaf in a plant and attaches the leaf blade to the stem.
Do all plants have petioles?
Not all leaves have petioles. In some plants, leaves are attached directly to the plant stem. Leaves that do not have petioles, they belong to the broomrape family. These types of leaves are called sessile leaves.
What is the difference between petiole and lamina?
Petiole- Petiole is the stalk which attaches the leaf blade ( lamina) to the stem. The petiole is the transition between the stem and the leaf blade. Lamina- The lamina is the expanded portion or blade of a leaf and it is an above-ground organ specialised for photosynthesis.
In which plant does petiole do photosynthesis?
In some plants, the petioles become modified or specialized in a way that they become leaf-like in appearance (expanded) and serve not only to support the leaf but to carry out photosynthesis as well. An example is the acacia.
Why petiole in Eichhornica plant is spongy?
There are air-filled cavities or air chambers in the petiole of Eichhornica plants to offer buoyancy for floating on water. That is why Eichhornica’s petiole is spongy.
Where does the petiole attach to the stem?
Petioles usually attach at to the margin (edge) of the blade along the base, but in peltate leaves, the petiole is attached underneath the blade (Figure 12.1. 3). Leaves that do not have a petiole and are directly attached to the plant stem are called sessile (apetiolate) leaves (Figure 12.1.
What is a petiole on a leaf?
The petiole is a stalk that connects the blade with the leaf base. The blade is the major photosynthetic surface of the plant and appears green and flattened in a plane perpendicular to the stem.
What is another name for the petiole?
Petiole Synonyms – WordHippo Thesaurus.
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What is another word for petiole?
| leaf | frond |
|---|---|
| stalk | stipule |
| leaf blade |
What plants have no petioles?
Explanation: Leaves that do not have petioles, such as those of the broomrape family, are called sessile leaves. Nearly-petiolate leaves are those that have very short petioles. Grasses do not generally have petioles, but some have petiole-like structures called pseudopetioles.
How do you say petioles?
How To Say Petiole – YouTube
What is petiole pronunciation?
[ pet-ee-ohl ] SHOW IPA. / ˈpɛt iˌoʊl / PHONETIC RESPELLING.
How many types of petiole are there?
5 Main Types of Petioles Found in Plants | Botany.
What is difference between petiole and stipule?
As nouns the difference between petiole and stipule
is that petiole is (botany) the stalk of a leaf, attaching the blade to the stem while stipule is (botany) basal appendage of a typical leaf of a flowering plant, usually appearing paired beside the petiole although sometimes absent or highly modified.
What is Pulvinus leaf base?
A pulvinus (pl. pulvini) is a joint-like thickening at the base of a plant leaf or leaflet that facilitates growth-independent (nyctinastic and thigmonastic) movement. … Pulvini may be present at the base or apex of the petiole or where the leaflets of a compound leaf are inserted into the rachis.
What does Pinnately compound mean?
A leaf which is divided into smaller leaflets, those leaflets arranged on each side of the leaf’s central stalk/rachis (axis). A bipinnately compound leaf is twice pinnate, a leaf blade divided into leaflets and having twice-diverged branching. …
What is petiole for 4th class?
The petiole is the long, thin, stalk that links the leaf blade to the stem.
What is petiole and phyllotaxy?
Some leaves have a petiole, which attaches the leaf to the stem, leaves that do not have petioles are directly attached to the plant stem and are called sessile leaves. … The arrangement of leaves on a stem is known as phyllotaxy, leaves can be classified as either alternate, spiral, opposite, or whorled.
Do all the leaves have petioles Class 6?
Ans. No, all the leaves do not have petioles. Some leaves have a petiole, which attaches the leaf to the stem and some leaves that do not have petioles are directly attached to the plant stem.
What is a Stipule of a leaf?
Definition of stipule
: either of a pair of small, usually leaflike appendages borne at the base of the petiole in many plants.
What are sessile leaves?
sessile. / (ˈsɛsaɪl) / adjective. (of flowers or leaves) having no stalk, growing directly from the stem. (of animals such as the barnacle) permanently attached to a substratum.
Which structures are associated with the pedicel and the petiole explain?
Petiole and pedicel are two types of stem in flowering plants. Their main function is to attach the leaf or a flower to the main stem while providing structural support to the structure. Furthermore, both arise at a node. And, they contain conducting tissues of a plant such as xylem and phloem.
What is reticulate and parallel venation?
PARALLEL VENATION is a arrrangement of veins in a leaf in which all veins are parallel to each other. … RETICULATE VENATION is a arrangement o veins in a leaf in which all veins form a web-like structure.
Why are leaves generally green?
The green coloration in the leaves of most plants is due to the presence of chlorophyll, a pigment used to absorb energy from the sun. … The plant is investing energy to grow the new leaf, so avoidance of herbivory allows the investment a better chance to mature.
What is lamina in plants?
The flat and expanded portion of the leaf in its entirety is known as the lamina. In short, the blade of the leaf or the leaf blade is called the lamina of a leaf.
In which plant petiole perform the function of photosynthesis and leaves are reduced?
Petioles of leaves are modified in plants like Acacia gets modified to green vertical structures called phyllodes. They carry out photosynthesis in Acacia as leaves are reduced or absent. They have very few stomata hence transpiration is minimum.
Which of the following is a modification of petiole?
Option A: Phyllodes are flat, green-coloured leaf-like modifications of petioles or rachis.
Is the petiole long and filled with air?
The stems are spongy, bulbous stalks (called petioles) that contain air-filled tissues that keep the plant afloat.
Why petiole in Eichhornica plant is spongy Brainly?
Answer: Answer: In petiole in Eichhornica plant there are air filled cavity or air chambers to provide buoyancy for floating on water. That is why petiole in Eichhornica is spongy.
In which among the following Hydrophytes petiole is swollen to help the plant to float on the surface?
In some plants petiole is swollen to form a bulb like structure to help the plants to float on water (Eichhornia). In submerged hydrophytes the leaves are thin, long and in the shape of a ribbon, ( Vallisneria) or finely dissected (Ceratophyllum). Floating leaves are large, entire and flat (Nymphaea).
Is a petiole a plant organ?
This paper focuses on one specific organ of plants, the leaf petiole. … Through photosynthesis, a plant processes the sun’s energy to produce its own sugar [2]. However, from an engineering point of view, the leaf has a noteworthy structure, in particular its petiole.
What is the function of the receptacle in a flower?
In angiosperms, the receptacle or torus (an older term is thalamus, as in Thalamiflorae) is the thickened part of a stem (pedicel) from which the flower organs grow. In some accessory fruits, for example the pome and strawberry, the receptacle gives rise to the edible part of the fruit.
What is the other name for a leaf stalk?
leafstalk. [ lēf′stôk′ ] The slender, elongated structure by which the leaves of most plants are attached to the stem. Also called petiole.
What is the synonym of stalk?
1’the stalk of a plant’ stem, shoot, trunk, stock, cane, bine, bent, haulm, straw, reed. branch, bough, twig. technical pedicel, peduncle, petiole, phyllode, scape, seta, stipe, caudex, axis.
What are three functions of petioles?
Petiole Function
Since leaves are responsible for fueling plants through photosynthesis, the petiole serves to transport the energy made in the leaf to the rest of the plant. It also serves to transport nutrients and water that are absorbed by the roots and passed up through the xylem, to the leaf.
What is a leaf called if it has no 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.
What is vein in leaf?
The veins are the vascular tissue of the leaf and are located in the spongy layer of the mesophyll. The pattern of the veins is called venation. In angiosperms the venation is typically parallel in monocotyledons and forms an interconnecting network in broad-leaved plants.