What adaptive role would positive phototropism play in a nat

What adaptive role would positive phototropism play in a natural ecosystem where plants are crowded?

Solution

The plants exhibit phototropism means growing towards light (positive phototropism) or away from light (negative phototropism). The phototropism occurs due to receptors present in the plasma membrane that respond to a specific wavelength of light. These receptors are known as photo receptors. The photo receptors are proteins containing pigment molecules. In phototropism the growth of plant may respond to blue wavelength of 400 – 500 nm of light.

The receptor responding to light contains a pigment component like phytochrome. Phytochrome is a receptor protein and is sensitive to red light. Phototropin is a receptor protein sensitive to blue light. The phototropin pigment of photo receptor changes its shape or conformation in response to blue light wavelength. The changing of the shape causes transfer of the phosphate group from ATP to protein component of photo receptor. The phosphorylated photo receptor thus triggers the transduction pathway and leads to the entry of light in to the cell.

The plants exhibiting phototropism grow towards light and it would be advantageous for such plants grow better than other plants in natural ecosystem containing crowded plants.