Axillary Bud Compound Leaf

In plants and trees with simple leaves a single leaf blade always grows on twigs attached with the help of a petiole.

Axillary bud compound leaf. A single leaf blade is always attached to a twig and is never divided into groups of smaller leaflets. Compound leaves have multiple blade units called leaflets or pinnae which are attached to a supporting structure called a rachis. This axillary bud can later grow out as a new branch or as a flower. Because each leaflet can appear to be a simple leaf it is important to recognize where the petiole occurs to identify a compound leaf.

A branch does not bear any axillary bud but itself occupies the axillary position of a leaf. Axillary bud growth is usually under the influence of the shoot apex ie it is subjected to apical dominance defined as the control exerted by the shoot apical meristem on the outgrowth of axillary meristems cline 1997 2000its consequence is the inhibition of axillary meristems during the growing season they are formed. Leaf is the most important photosynthetic structure in green plants. Each bud has the potential to form shoots and may be specialized in producing either vegetative shoots or reproductive shoots.

There are two main types of compound leaves. The leaflets may have petiolules and stipels the equivalents of the petioles and stipules of leaves. Actually the meristem formed at the leaf axil starts initiating. With few exceptions each leaf is associated with a small bud found in the crotch between the leaf and the stem called the leaf axil.

The simple leaves of a branch may bear stipules at their bases. Once formed a bud may remain dormant for some time or it may form a shoot immediately. Distinction between compound leaf and branch. No stipules are present at the base of branch.

2 a compound leaf bears a bud axillary bud in its axil but itself never arises in the axil of another leaf. A compound leaf has a fully subdivided blade each leaflet of the blade being separated along a main or secondary vein. Each compound leaf also subtends an axillary bud. This kind of leaf has an axillary bud close to the point where it meets the stem ie.

This is the region where the stem of the leaf meets with the branch. Some leaves are more complex and form elaborate compound leaves with many leaflets. A branch arises in the axil of a leaf. The branch usually develops from an axillary bud.

The key difference between simple and compound leaves is that the leaf blade of the simple leave is undivided while the leaf blade of a compound leaf has several leaflets. Each axillary bud has the potential to form a shoot whether it is a vegetative shoot or a flowering shoot reproductive shoot. 1 terminal bud is absent in case of a compound leaf whereas a branch always bears a terminal bud. Compound leaves vary depending on the arrangement of leaflets on the rachis and on the order of complexity.

The axillary bud is the embryonic shoot that can be found in the axil of a leaf. Compound leaves are a characteristic.