What are the parts of a leaf and their functions?

What are the parts of a leaf and their functions?

What is the structure of a leaf?

• All leaves have the same basic structure – a midrib, an edge, veins and a petiole.
• The main function of a leaf is to carry out photosynthesis, which provides the plant with the food it needs to survive.
• Plants provide food for all life on the planet.

What is base in a plant?

In biology, ‘base’ means the part of a plant or animal organ that is near the point of attachment to the ground or to a more basal part of the body. In all standard text books on plant anatomy, including Plant Anatomy, the tips of shoots and roots are referred to as apices (Figure 1) [1].

What is the base tissue of leaf?

Similar to the other organs of a plant, a leaf is comprised of three basic tissue systems, including the dermal, vascular, and ground tissue systems. These three motifs are continuous throughout an entire plant, but their properties vary significantly based upon the organ type in which they are located.

What is found at the base of every leaf?

Structure of a Typical Leaf Leaves also have stipules, small green appendages usually found at the base of the petiole. Most leaves have a midrib, which travels the length of the leaf and branches to each side to produce veins of vascular tissue.

What are the two functions of a leaf?

The two main functions performed by the leaf are photosynthesis and transpiration. Photosynthesis is the process by which green plants make their food from carbon dioxide and water in the presence of sunlight.

When the leaf base is swollen it is called?

– A swollen leaf base is called pulvinus. Swelling of leaves is a phenomenon that is observed in members of the family Fabaceae. Swelling occurs as a result of change in turgor pressure and it is observed mostly during the night time. It in a way protects the axillary bud. So the correct answer is A) Pulvinus.

What is leaf anatomy?

The leaf is the primary photosynthetic organ of the plant. It consists of a flattened portion, called the blade, that is attached to the plant by a structure called the petiole. Sometimes leaves are divided into two or more sections called leaflets. (Plants that leave entirely within water do not have a cuticle).

Is petiole a stalk?

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 always present at the base of the leaf petiole?

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.

What makes up the base of a leaf?

In angiosperm: Leaves …leaf is composed of a leaf base, two stipules, a petiole, and a blade (lamina). The leaf base is the slightly expanded area where the leaf attaches to the stem.

What are the functions of the leaves of a plant?

Leaves are found at the nodes of the stem and are responsible for preparing food for the plant through photosynthesis. Leaves contain the photosynthetic pigment called chlorophyll. There are three main parts of a leaf – Leaf base, leaf lamina, and petiole. There are two basic types of leaves – simple leaves and compound leaves.

Which is the lowermost part of the leaf?

Leaf having petiole is called petiolate. It is termed sessile if the petiole is absent. Leaf base (= hypo podium) is the lowermost part of the leaf by which the leaf is joined to the node of the stem. It protects the young axillary bud. Leaf base is often indistinguishable from the petiole.

Where is the base of the plant located?

The leaf base is the slightly expanded area where the leaf attaches to the stem. In angiosperm: Leaves …petiole, when present, and the leaf base become thickened, and often the latter expands laterally and fully or partially encloses the stem.