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6 Examples of Positive Tropism

August 10, 2023
written by Sidra Batool

Movement of plant towards stimulus is called positive tropism.

Examples of Positive Tropism

Here are few examples of Positive Tropism:

1.  Positive Phototropism

Plants show positive phototropism when they grow towards a light source. This behavior ensures that leaves receive optimal light exposure for photosynthesis, which is essential for their energy production and overall growth.

2.  Positive Geotropism

Plants exhibit positive geotropism when their roots grow towards the ground. This enables roots to anchor the plant securely in the soil and helps them access nutrients and water from the soil, and helping the plant’s overall development.

3.  Positive Chemotaxis

Bacteria display positive chemotaxis when they move towards chemicals they require for survival. This movement allows them to locate essential nutrients or favorable environments, enhancing their chances of thriving and reproducing effectively.

4.     Positive Thigmotropism

Plants respond with positive thigmotropism when they bend towards the source of touch. This adaptive behavior helps plants secure themselves to supportive structures, protecting them from potential harm and promoting stable growth.

5.     Positive Hydrotropism

Plants exhibit positive hydrotropism when they grow towards water sources. By directing their growth towards water, plants ensure a steady supply of this resource for various metabolic processes.

6.     Positive Aerotropism

Plants show positive aerotropism when they grow towards air. This behavior aids in optimizing gas exchange for respiration, which is essential for cellular energy production and maintaining the plant’s metabolic balance.

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