Question

which different types of movements observed in plant​

Answer 1

We observe two types of movements in plants

Tropic movement >it is a directional movement

Nastie movement >this is a non directional movement

These all movement is actually caused by growth of plant body

by the auxin and other substances

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Answer 2

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There are two types of movements observed in plants.


They are:

=> $\sf{\underline{Nastic\:movement}}$

=> $\sf{\underline{Tropic\:movement}}$


$\sf{\underline{1)\:Nastic\:movements:}}$


⚫These are non directional responses to stimuli.


⚫Such as:

=> $\sf{\underline{Temperature}}$

=> $\sf{\underline{Heat}}$


⚫These kind of movements do not depend on direction of stimulus.


⚫Such as:

=> $\sf{\underline{Seismonastic}}$

=> $\sf{\underline{Chemonastic}}$


⚫Example of Seismonastic movement is movement of Venus fly trap.



$\sf{\underline{2)\:Tropic\:movement:}}$


⚫This is the response to stimuli that comes from one direction.


⚫It is a directional movement.


$\sf{\underline{Positive\:and\:Negative\:tropism:}}$


$\sf{\underline{1)\:Positive\:tropism:}}$


⚫If the movement of the plant part is towards the stimulus, then it is known as positive tropism.


$\sf{\underline{2)\:Negative\:tropism:}}$


⚫If the movement of the plant part is away from the stimulus, then it is known as negative tropism.


⚫For example:

=> $\sf{\underline{Phototropism}}$

=> $\sf{\underline{Geotropism}}$


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