Lecture #6 Stem Anatomy I

All land plants have what type of stem, roots, and leaves?

Specialized

Land plants adapted specialized structures to absorb and conduct what?

Water

What function produces and supports leaves, as well as transports water, minerals, and sugars between organs?

Stems

Stem functions can be modified; the function of modified roots, stems and leaves may be

Atypical

What part of the stem is a firm, slender, sharp-pointed structure, representing a modified leaf or stipule?

Spine

What is the name of the appendage found at the base of the petiole, such as the base of a leaf’s stalk?

Stipule

What is the name of a stiff, woody, modified stem with a sharp point?

Thorn

Propagation, defense, storage, and climbing support are all examples of what?

Stem modification

What type of stems are depicted in the image above?

Underground

What type of stem is depicted in the image above?

Aerial

What type of stem is depicted in the image above?

Sub-Aerial

What type of modified stem has especially long and thin internodes allowing spread of the plant? This stem, when found in a favorable spot, has new growth characterized by vertical growth, shorter internode, fand fully expanded leaves (one form of asexual propagation). Hint: They are also known as runners.

Stolon