 | Term | Definition |
| |
photomorphogenesis |
Effects of light on plant morphology |
| |
action spectrum |
A graph that measures the effectiveness of wavelengths in doing something (ex: photosynthesis) |
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blue-light photoreceptor |
A class of light receptors in plants. Blue light initiates a variety of responses, such as phototropism and slowing of hypocotyl elongation. |
| |
phytochrome |
A photoreceptor that absorbs red light |
| |
cryptochrome |
A blue-light photoreceptor that stops hypocotyl elogation |
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phototropin |
A blue-light photoreceptor that mediates phototropism |
| |
zeaxanthin |
A carotenoid based photoreceptor that causes stomata to open or close |
| |
circadian rhythm |
A physiological cycle of about 24 hours that is present in all eukaryotic organisms and that persists even in the absence of external cues. |
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photoperiodism |
A physiological response to photoperiod, the relative lengths of night and day. |
| |
short-day plant |
A plant that flowers (usually in late summer, fall, or winter) only when the light period is shorter than a critical length. |
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long-day plant |
A plant that flowers (usually in late spring or early summer) only when the light period is longer than a critical length. |
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day-neutral plant |
A plant whose flowering is not affected by photoperiod. |
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vernalization |
The use of cold treatment to induce a plant to flower. |
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florigen |
A flowering signal, not yet chemically identified, that may be a hormone or may be a change in relative concentrations of multiple hormones.f |
| |
gravitropism |
A response of a plant or animal to gravity. |
| |
Statolith |
a specialized plastid that contains dense starch grains and may play a role in detecting gravity. |
| |
thigmomorphogenesis |
A response in plants to chronic mechanical stimulation, resulting from increased ethylene production. An example is thickening stems in response to strong winds. |
| |
thigmotropism |
A directional growth of a plant in response to touch. |
| |
heat-shock protein |
A protein that helps protect other proteins during heat stress. |
| |
jasmonic acid |
An important molecule in plant defense against herbivores. |
| |
virulent |
Pathogens against which a plant has little specific defense |
| |
avirulent |
A pathogen that doesn't hurt its host too much |
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gene-for-gene recognition |
A widespread form of plant disease resistance involving recognition of pathogen-derived molecules by the protein products of specific plant disease resistance genes. |
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elicitor |
A molecule that induces a broad type of host defense response. |
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oligosaccharin |
A type of elicitor that is derived from cellulose fragments released by cell wall damage |
| |
phytoalexin |
An antibiotic, produced by plants, that destroys microorganisms or inhibits their growth |
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pathogenesis-related protein |
A protein involved in plant responses to pathogens |
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hypersensitive response |
A plant’s localized defense response to a pathogen. |
| |
system acquired response |
A defensive response in infected plants that helps protect healthy tissue from pathogenic invasion. |
| |
salicylic acid |
A plant hormone that may be partially responsible for activating systemic acquired resistance to pathogens. |
| Add or remove terms from this set |
