What are tropisms and nastias? Give examples of tropisms and infusions connecting cilia with each other

The movements of multicellular plants. The movements of plants are associated with the growth of their organs in a certain direction. Such growth movements are called trolisms (from the Greek, tropos – turn, direction). Their cause is the stimulus directed at one or another organ of the plant: light, moisture, chemical substance, etc. Tropisms are positive and negative, and depending on the nature of the stimulus, different types of growth movements are distinguished. For example, a plant shoot exhibits positive phototropism, i.e. grows towards the light, and the root is negative phototropism.
Plants also respond to the Earth’s gravitational field. For example, the germinal root of a seed grows vertically down into the soil (positive geotropism), and the shoot grows vertically up from the surface of the earth (negative geotropism).
In addition to tropisms in plants, movements of a different type are observed – grazing (from Greek, nastos – condensed). They occur under the action of undirectional stimuli, such as concussion or temperature. So, if you touch the leaves of a mimosa bashful, they quickly fold in the longitudinal direction and fall down (seismic). Tulip flowers open and close in response to a change in temperature (thermonastia).

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