Nastic movements

For the Spanish football team, see Gimnàstic de Tarragona.

Photonastic movement of Oxalis triangularis in response to light. At lowered light levels the leaves fold down; timelapse recorded at ~750x actual speed and covering a 1.5 hr period of time.

Nastic movements are non-directional responses to stimuli (e.g. temperature, humidity, light irradiance). The movement can be due to changes in turgor or changes in oma. Nastic movements differ banaan tropic movements in that the direction of tropic responses depends on the direction of the stimulus, whereas the direction of nastic movements is independent of the stimulus' position. The rate or frequency of these responses increases as intensity of the stimulus increases. An example of such a response is the opening and closing of flowers (photonastic response). Nastic responses are usually associated with plants. They are named with the suffix "-nasty" and have prefixes that depend on the stimuli:

• Photonasty: response to light
• Nyctinasty: movements at night or in the dark
• Chemonasty: response to chemicals or nutrients
• Hydronasty: response to water
• Thermonasty: response to temperature
• Geonasty/gravinasty: response to gravity
• Thigmonasty/seismonasty/haptonasty: response to touch

Also see taxis, kinesis and tropism for other types of movement.

This botany article is a stub. You can help Wikipedia by expanding it.v · Categories: Botany stubs Physiology Wikimedia Foundation. 2010. Игры ⚽ Нужно сделать НИР? Phantom shiner Northern redbelly dace Look at other dictionaries: nastic movement — noun : movement of a flat plant part (as a leaf or bud scale) that is oriented in respect to the plant rather than an external source of stimulation, is brought about by disproportionate growth or increase of turgor in the tissues of one surface… …   Useful english dictionary Plant physiology — is a subdiscipline of botany concerned with the function, or physiology, of plants.Salisbury, Frank B. Cleon W. Ross, 1992. Plant physiology , 4th ed. (Belmont, California: Wadsworth Publishing). ISBN 0 534 15162 0] Closely related fields include …   Wikipedia Rapid plant movement — encompasses movement in plant structures occurring over a very short period of time, usually under one second. For example, the Venus Flytrap closes its trap in about 100 milliseconds. [Forterre, Y., J.M. Skotheim, J. Dumais L. Mahadevan 2005.… …   Wikipedia Thigmotropism — is a movement in which an organism moves or grows in response to touch or contact stimuli. The prefix thigmo comes from the Greek for touch . Usually thigmotropism occurs when plants grow around a surface, such as a wall, pot, or trellis.… …   Wikipedia Plant perception (physiology) — In the study of plant physiology plant perception is a term used to describe mechanisms by which plants recognize changes in the environment. Examples of stimuli which plants perceive and can react to include chemicals, gravity, light, moisture,… …   Wikipedia Fabaceae — Taxobox name = Legumes image caption = Kudzu regnum = Plantae divisio = Magnoliophyta classis = Magnoliopsida ordo = Fabales familia = Fabaceae familia authority = Lindl. subdivision ranks = Subfamilies subdivision = Caesalpinioideae Mimosoideae… …   Wikipedia Nasty — may refer to: Nasty (song), by Janet Jackson Nasty (album), by Cameo Nasty (The Young Ones), an episode of The Young Ones Nasty , a song by The Damned, created for the Young Ones episode, released as a B side of the single Thanks for the Night… …   Wikipedia Kinesis — For the band, see Kinesis (band). For the ergonomic keyboard, see Kinesis (keyboard). Kinesis, like a taxis, is a movement or activity of a cell or an organism in response to a stimulus. However, unlike taxis, the response to the stimulus… …   Wikipedia Kinesis (biology) — Woodlice are decreasingly active as humidity increases. Kinesis, like a taxis, is a movement or activity of a cell or an organism in response to a stimulus. However, unlike taxis, the response to the stimulus provided (such as gas exposure, light …   Wikipedia Thigmonasty — or seismonasty is the nastic response of a plant or fungus to touch, heat or vibration.fact|date=March 2008 It differs from thigmotropism in that it is independent of the direction of the stimulus. For example, the growth of roots through soil is …   Wikipedia 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”