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21 Cards in this Set
- Front
- Back
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Abscisic Acid
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A plant hormone that slows cell growth and causes dormancy until conditions are right.
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Action Potential
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A rapid change in the membrane potential of an excitable cell.
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Auxin
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A natural plant hormone that causes cell elongation and root formation.
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Circadian Rhythms
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A physiological cycle of about 24 hours that is present in all eukaryotic organisms and continues even in absence of external cues.
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Cytokinins
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Plant hormones that prohibit aging and promote cell division.
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Day-neutral Plants
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A plant whose flowering is not affected by light.
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Ethylene
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The only gaseous plant hormone. Causes apoptosis and fruit ripening.
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Gene-for-gene Recognition
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A widespread form of plant disease resistance.
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Gibberellins
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A plant hormone that stimulates growth in the stem and leaves.
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Gravitropism
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Movement in response to gravity as a stimulus.
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Hormone
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Circulating chemical signals that act on specfic cells to change their function.
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Hypersensitive Response
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A plants localized defense to a pathogen.
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Long Day Plants
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A plant that flowers only when the critical light period is long enough.
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Oligosaccharins
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A type of elicitor that is derived from cellulose fragments released by cell wall damage.
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Photoperiodism
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A physiological response to photoperiod, the relative lengths of night and day.
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Phototrophism
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Growth of a plant shoot toward or away from light.
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Phytoalexins
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An antibiotic, produced by plants, that destroys microorganisms or inhibits their growth.
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Phytochrome
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A class oflight receptors in plants. Regulate responses.
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Short Day Plants
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A plant that flowers only when the light period is shorter than a critical length.
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Thigmotrophism
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A directional growth of a plant in response to touch.
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Trophism
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A growth response that results in the curvature of the plant organs toward or away from a stimuli.
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