NEET BIOLOGY

Detailed explanation-1: -Phototropism Examples Sunflower is a highly phototropic plant. They grow towards the sun and are also seen tracking the movement of the sun throughout the day. That is, the flower keeps changing its direction with the movement of the sun. Sunflower requires more light for its growth and survival.

Detailed explanation-2: -In 1887, the German botanist Julius von Sachs was the first to examine whether phototropism could be stimulated by particular colors of light (2). By using both colored glass and solutions to illuminate plants with different wavelengths of light, Sachs found that blue light was the most effective.

Detailed explanation-3: -Phototropism is the ability of the plant to re-orient the shoot growth towards a direction of light source. Phototropism is important to plants as it enhances the ability of plants to optimize their photosynthetic capacity. As discussed above, phototropic response is exclusively controlled by phots.

Detailed explanation-4: -All flowering plants, including Arabidopsis, contain two phototropins (phot1 and phot2) [7]. Phot1 functions primarily as the photoreceptor for root phototropism [5] and hypocotyl phototropism over a broad range of blue light intensities [7].