Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
14 Cards in this Set
- Front
- Back
|
tropic response
|
A growth response oriented with regard to the stimulus.
|
|
|
differential growth
|
Growth required for one side of a plant to grow faster than another.
|
|
|
nastic response
|
A nongrowth response that is stereotyped and not oriented with regard to the stimulus.
|
|
|
morphogenic (morphogenetic) response
|
A response in which the quality of the plant changes, such as conversion from a vegetative state to a floral state.
|
|
|
hormone
|
A chemical that is produced by one part of a plant, often in response to a stimulus, and then is transported to other parts and induces responses in appropriate sites.
|
|
|
apical dominance
|
The suppression of axillary buds by the growing, active apical bud of a shoot
|
|
|
photoperiod
|
In reference to cycles of light and darkness, the length of time that uninterrupted light is present.
|
|
|
short-day plant
|
A plant that is induced to flower by nights longer than the critical night length.
|
|
|
long-day plant
|
A plant that is induced to flower by nights shorter than the critical night length.
|
|
|
day-neutral plant
|
A plant that is induced to flower by factors other than night length.
|
|
|
phytochrome
|
A pigment involved in many aspects of morphogenesis in which the stimulus is red light or the length of a dark period. Pfr absorbs far-red light, Pr absorbs red light.
|
|
|
endogenous rhythm
|
A rhythm generated entirely within an organism whose periodicity is not maintained by an external rhythm.
|
|
|
negative feedback system
|
An enzyme system in which the product inhibits the action of one or several of the enzymes that produce it.
|
|
|
circadian rhythm
|
An endogenous rhythm whose period is approximately 24 hours long.
|
