Botany

Created by lxlkarisa 

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24 terms · Ch. 25- Plant Responses and Adaptions

Carotenoid pigments

Responsible for fall foliage color

Auxins and ethylene

Control shedding of leaves

Plant Hormones

Regulate growth and send chemical messages

Phototropism

Tendency of plants to grow toward a source of light

Phytochrome

Pigment that controls photoperiodism and prepares the plant for winter

Gravitropism

Response of a plant to the force of gravity (helps roots to grow down)

Apical Meristem

Where auxins are produced and if removed, allow for lateral bud growth

Flowering

The time and process of budding and unfolding of blossoms

Dormancy

Decreased plant activity

Tropism

Response to external stimuli

Abscission Layers

Reaction to seasonal changes

Thigmotropism

Response of plants to touch (ex. Venus Flytrap)

Very Very Old

Plant growth still occurs even when plants are...

Cytokinins

Increase thickness, promote gravitropism, and help seeds to sprout

Meristem

Tissues that divide later and become specialized

Botany

The study of plants

Auxins

Stimulate cell elongation near the tip of the root or stem

Herbicides

Synthetic auxins

Receptors

Detect changes in the environment

Rapid response

Folding of leaves in response to touch due to osmotic pressure

Photoperiodism

Response of plants to periods of light and darkness (ex. Morning Glories and 4 O'clocks)

Hormones

Allow for environmental processes

Gibberellins

Affect plant growth and fruit development

Fruit Tissues

Source of ethylene gas in a plant

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