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The axillary bud (or lateral bud) is an embryonic or organogenic shoot located in the axil of a leaf. Each bud has the potential to form shoots, and may be specialized in producing either vegetative shoots (stems and branches) or reproductive shoots (flowers).
The embryonic shoot which lies at the intersection of the petiole and stem of a plant is known as the axillary bud. Certain regions of the meristematic cells are left behind the node located in the middle of the leaf and stem as the apical meristem grows and forms leaves.
Identify the main external structures of the shoot system, including the nodes, internodes, leaves, axillary buds, and axillary shoots. Plant stems, whether above or below ground, are characterized by the presence of nodes and internodes (Figure \(\PageIndex{1}\)).
In a node, a leaf emerges below the axillary bud. Figure \(\PageIndex{1}\): A diagram of a node. Each node is comprised of a leaf (on the bottom) and an axillary bud (on the top, located in the axil where the petiole meets the stem). Diagram by Nikki Harris, CC-BY 4.0 with labels added.
While these plants appear similar, each true leaf has an axillary bud above. On the left, the axillary bud is above each compound leaf (but not each leaflet). On the right, each leaf has a bud above it, identifying them as leaves rather than leaflets.
The lateral branch of seed plants, in their nascent state, is referred to as axillary bud that is commonly present on the stem at the axil of leaves. The lateral bud primordia usually arise in close association with leaf primordia.
Axillary buds are small shoots that develop in the leaf axils, which are the angles between the stem and a leaf. These buds have the potential to grow into branches, flowers, or new leaves, playing a crucial role in vegetative growth and organogenesis.
