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| A plant hormone that generally acts to inhibit growth, promote dormancy, and help the plant tolerate stressful conditions. | ||
| A profile of the relative performance of different wavelengths of light. | ||
| Programmed cell death brought about by signals that trigger the activation of a cascade of "suicide" proteins in the cells destined to die. | ||
| A class of plant hormones, including indoleacetic acid (IAA), having a variety of effects, such as phototropic response through the stimulation of cell elongation, stimulation of secondary growth, and the development of leaf traces and fruit. | ||
| A physiological cycle of about 24 hours that is present in all eukaryotic organisms and that persists even in the absence of external cues. | ||
| A class of related plant hormones that retard aging and act in concert with auxins to stimulate cell division, influence the pathway of differentiation, and control apical dominance. | ||
| A plant whose flowering is not affected by photoperiod. | ||
| The only gaseous plant hormone, responsible for fruit ripening, growth inhibition, leaf abscission, and aging. | ||
| A class of related plant hormones that stimulate growth in the stem and leaves, trigger the germination of seeds and breaking of bud dormancy, and stimulate fruit development with auxin. | ||
| A response of a plant or animal in relation to gravity. | ||
| Any one of the many circulating chemical signals found in all multicellular organisms that are formed in specialized cells, travel in body fluids, and coordinate the various parts of the organism by interacting with target cells. | ||
| A plant that flowers, usually in late spring or early summer, only when the light period is longer than a critical length. | ||
| Growth of a plant shoot toward or away from light. | ||
| A pigment involved in many responses of plants to light. | ||
| A small, nonprotein, water-soluble molecule or ion, such as calcium ion or cyclic AMP, that relays a signal to a cell's interior in response to a signal received by a signal receptor protein. | ||
| A plant that flowers, usually in late summer, fall, or winter, only when the light period is shorter than a critical length. | ||
| Sensory organs that contain mechanoreceptors and function in the sense of equilibrium. | ||
| A response in plants to chronic mechanical stimulation, resulting from increased ethylene production; an example is thickening stems in response to strong winds. | ||
| The directional growth of a plant in relation to touch. | ||
| A growth response that results in the curvature of whole plant organs toward or away from stimuli due to differential rates of cell elongation. |
