Nastic responses in plants

Nasties: –  is a non-directional movement of part of a plant is a response to an external stimulus. For example, “sensitive plant” Mimosa pudica is sensitive to touch as well as a variety of other stimuli.  It exhibits normal sleep movement but responds very rapidly to shocks (seismonasty) such as a sharp blow, injury, or sudden change in temperature or light intensity.  If leaflets at the tip are shocked, they fold upwards in seconds.  If the stimulus is strong or sustained, successive pairs of leaflets fold up and stimulus eventually passes through the whole leaf, resulting in the petiole drooping.  The stimulus will pass in the reverse direction if the stem is stimulated. Please find free downloadable notes, exams and marking guides of agriculture, biology, Physics, chemistry etc.  from digitalteachers.co.ug website. Dr. Bbosa Science