FORESTRY
PLANT AND WOOD ANATOMY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Hydrotropism
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Heliotropism
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Geotropism
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Thigmotropism
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Detailed explanation-1: -The movement of plant due to touch is known as a thigmotropic movement. Thigmotropism is a directional growth movement which occurs as a mechanosensory response to a touch stimulus. For example, once a shoot touches a suitable support, it grows towards the surface it is touching.
Detailed explanation-2: -The sensitive plant. Mimosa pudica, known as the sensitive plant, and some of its relatives are other well-known thigmonastic plants. A touch stimulation results in a very rapid folding up of the small leaflets composing the doubly compound leaves (Fig.
Detailed explanation-3: -When subjected to constant directional pressure, such as a trellis, plants move to grow around the object providing the pressure; this process is known as thigmotropism. Thigmonastic responses include opening and closing leaves, petals, or other parts of the plant as a reaction to touch.