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Stems
Functions and Terminology of stems
32
Agriculture
Undergraduate 3
01/22/2014

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Term
Support
Definition
Stems provide support and a point of attachment for leaves, flowers and fruit, optimizing their position for exposure to sunlight, and pollination and dispersal, respectively
Term
Transport
Definition
The presence of a vascular system within the stem provides for the conduction of wwater and dissolved minerals from the roots upward, and transport of carbohydrates produced in the leaves downard and throught the pant. Via the stem, all plant parts are connected to one another
Term
Growth and tissue production
Definition
Via cell division in specialized areas, the stem grows and produces essential tissues and structures such as buds, leaves, flowers and fruits
Term
Storage
Definition
Specialized stems, usually underground, serve as storage reservoirs for carbs and other nutrients
Term
Photosynthesis
Definition
Many stems, especially when young, have tissues with chloroplasts that contribute to the plant's total carbon balance. Other specialized stems may be leaf-like in shape or carry out photosynthesis in plants where leaves are greatly reduced or absent
Term
Acaulescent
Definition
When a stem is not present or apparent
Term
Aerial stem
Definition
Stem that grows above ground
Term
Bud
Definition
Embryonic stem, often covered by some protective structure for protection
Term
Bulb
Definition
Short, flattened underground stem surrounded by layers of thick fleshy modified leaves (scales)
Term
Cladophyll
Definition
Photosynthetic stem that is flattened and resembles a leaf
Term
Corm
Definition
Short, vertical underground stem surrounded by thin papery leaves
Term
Herbaceous
Definition
Stem or plant that is soft and without woody tissue
Term
Internode
Definition
Area of a stem between two consecutive nodes
Term
Leaf
Definition
Typically flat photosynthetic structure produced from the nodes of stems and branches of plants
Term
Liana
Definition
Woody vine
Term
Long shoot
Definition
Stem or branch characterized by long internodal areas, when both long and short shoots are presend on the same plant
Term
Node
Definition

Area of a stem from which leaves or buds are produced

 

Term
Prickle
Definition
Sharp superficial outgrowth of epidermal plant tissue that may be found anywhere on the plant
Term
Rhisome
Definition
Horizontal undeground stem with scale-like leaves
Term
Runner
Definition
Elongated horizontal stem that grows on the surface of the ground and that roots and produces new plants at the nodes and at the tip
Term
Shoot
Definition
Young stem or branch
Term
Short shoot
Definition
Stem or branch caracterized by short internodal areas, when both long and short shoots are present on the same plant
Term
Spine
Definition
Sharp, modified leaf (or portion of a leaf) or stipule that arises at the node
Term
Stolon
Definition
Elongated horizontal stem that grows on the surface of the ground and that roots and produces new plants at the nodes and at the tip
Term
Subterranean stem
Definition
Underground stem
Term
Tendril
Definition
Modified stem or leaf that is used for attachment and climbing
Term
Thorn
Definition
Sharp, modified branch that arises at the node from the leaf axil or at the branch tip
Term

Trunk

 

Definition
Main stem of a tree
Term
Tuber
Definition
Short, fleshy underground stem or thickened portion of a rhizome
Term
Twig
Definition
Small branch or shoot from a tree
Term
Vine
Definition
Herbaceous plant with a stem that trails on the ground or climbs
Term
Woody
Definition
Hard stem or plant formed by the presence of secondary xylem
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