BSC 314 Lecture Notes - Lecture 10: Meristem, Primordium, Apical Dominance
26 Jun 2018
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Characteristics of Shoot Systems
The aboveground, conspicuous part of flowering plants constitutes the shoot system,
which is composed of erect stems on which are attached leaves, flowers, and buds.
Leaves are attached to the stem at regions called nodes. The section of stem between
nodes is an internode, and the upper angle between the stem and the leaf at the node
is called the leaf axil. Axillary (lateral) budslocated in the leaf axils give rise
to vegetative branch stems or to flowers. Terminal buds are present at the tips of the
main stem and branches and contain the apical meristem tissues. The shoot originates
in the embryo at the end opposite the root and develops a complex shoot apex,
different from that of the root.
The growing point of the shoot—the apical meristem—is surrounded by developing
leaves ( leaf primordia) that have in their axils bud primordia. The buds are of two
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Document Summary
The aboveground, conspicuous part of flowering plants constitutes the shoot system, which is composed of erect stems on which are attached leaves, flowers, and buds. Leaves are attached to the stem at regions called nodes. The section of stem between nodes is an internode, and the upper angle between the stem and the leaf at the node is called the leaf axil. Axillary (lateral) budslocated in the leaf axils give rise to vegetative branch stems or to flowers. Terminal buds are present at the tips of the main stem and branches and contain the apical meristem tissues. The shoot originates in the embryo at the end opposite the root and develops a complex shoot apex, different from that of the root. The growing point of the shoot the apical meristem is surrounded by developing leaves ( leaf primordia) that have in their axils bud primordia.
