Dictionary > Thigmonasty

Thigmonasty

Definition
noun
A form of nastic movement (of a plant or a fungus) as a response to touch or vibration
Supplement
Nastic movements pertain to the plant movements in response to a stimulus. There are many forms of nastic movements and one of them is called thigmonasty. Thigmonasty is a form of nastic movement by a plant or a fungus in response to touch or vibration.1
Thigmonasty is different from thigmotropism. Both of them are a response to the touch stimulus. However, thigmotropism is a directional movement response whereas thigmonasty is not. Furthermore, thigmotropism is one that involves the growth response of the plant rather than its movement. An example of thigmotropism is the coiling of tendrils or twiners upon contact to objects for support. In thigmonasty, an example is the shutting of a venus fly trap.
The drooping of leaflets of Mimosa pudica when touched is also a thigmonastic movement. It is because the response of this plant is not influenced by the direction of stimulus, which is a characteristic of thigmotrophic movements.
Another example is the shrinking and rebounding of the anthers when a pollinator lands on the flower of thistles. The insect is subsequently loaded with pollen.
Synonym(s):

  • seismonasty
  • haptonasty

Compare:

  • thigmotropism
  • See also:

    Reference(s):

    1 Stiles, W. (1994). Principles of Plant Physiology. Discovery Publishing House. pp. 520–


    You will also like...

    Human perception in action
    Human Perception – Neurology

    This tutorial investigates perception as two people can interpret the same thing differently. Know more about human perc..

    Pink Lotus plant on a pond
    Freshwater Lentic Communities & Animals

    This tutorial looks at some of the communities in freshwater lentic habitats. For instance, symbiosis occurs in a commun..

    Adaptive Radiation
    Adaptive Radiation

    The diversification of several new species from a recent ancestral source, each adapted to utilize or occupy a vacant ad..

    Population Growth and Survivorship
    Population Growth and Survivorship

    This lesson looks at population attributes, regulation, and growth. It also covers population genetics, particularly gen..

    Energy pyramid
    Freshwater Community Energy Relationships – Producers & Consumers

    This tutorial looks at the relationship between organisms. It also explores how energy is passed on in the food chain an..

    Plant Water Regulation
    Plant Water Regulation

    Plants need to regulate water in order to stay upright and structurally stable. Find out the different evolutionary adap..