Lab 7 and 8: Plant Hormones: Gibberellins

Hormone

a chemical released by a cell that sends messages that affect other cells

Auxin (IAA)

a plant hormone usually produced at the shoot apical meristems, young leaves, developing seeds, and fruits

Auxin (IAA) is responsible for

stimulating stem elongation, regulating fruit development, and promoting the formation of lateral roots

Ethylene

a gaseous plant hormone usually produced by most parts of the plant in high and low concentrations based on growth that

Ethylene is responsible for

promoting the ripening of many types of fruit, and promoting root and root hair formation

Gibberellins

a plant hormone produced by the meristem of the apical bud to stimulate stem elongation, and by developing seeds to initiate seed germination

Gibberellins is responsible for

stimulating stem elongation, and by developing seeds to initiate seed germination

P. Sativum

a species of angiosperms who produce pea pods as fruits

P. Sativum L. var Alaska

a normal variety of P. Sativum

P. Sativum L. var Little Marvel

a dwarf variety of P. Sativum that has a genetic mutation in the Giberellin-synthesizing gene

Taproot

the root coming directly form the stem

Lateral Roots

the roots branching out from the taproot that help absorb nutrients

Stem

the main structure above the group that transports water from roots

Bud

undeveloped structure that develops into a flower, leaf, or shoot via meristem tissue

Lateral Bud

a bud that grows from the side of the stem, usually at the node, and can develop into a branch or flower

Apical Bud

a bud at the tip of the stem allowing the plant to grow taller or longer

Node

the point on the stem where leaves, branches, or buds grow

Meristematic Tissue

plant tissue that helps with growth

apical meristematic tissue

plant tissue that helps the plant grow taller

lateral meristematic tissue

plant tissue that helps the plant grow wider