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24 terms

Botany

Ch. 25- Plant Responses and Adaptions
STUDY
PLAY
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