Concerning affect of intensity of light on growth of plants, which statement is not correct ?
Correct answer: B. Quality of light has no influence on growth rate
- A. High intensity of light destroys the chlorophyll
- B. Quality of light has no influence on growth rate
- C. Duration of light affects the growth of vegetative and reproductive structures
- D. Without light, photosynthesis cannot take place
- E. Blue light enhances the cell division but refard cell enlargement
Explanation
Quality of light has no influence on growth rate. The quality of light, including its spectrum and intensity, can indeed have a significant impact on the growth rate of plants and some other organisms.Different wavelengths of light, often referred to as colors, affect plant growth in various ways. For instance, blue light is essential for vegetative growth, red light promotes flowering and fruiting, and green light is less effective for photosynthesis. The spectrum of light influences processes like photosynthesis, photomorphogenesis (light-induced changes in plant form), and circadian rhythms.Light intensity, which is the amount of light energy reaching the plant, plays a crucial role in photosynthesis. Plants require a minimum light intensity for photosynthesis to occur. Too little light can limit growth, while too much light can cause stress or damage to the plant.In controlled environments such as greenhouses or growth chambers, the quality and quantity of light are carefully manipulated to optimize plant growth. Different light sources, such as fluorescent, LED, or high-intensity discharge (HID) lights, are used to tailor the spectrum and intensity of light for specific plant requirements.Plants exhibit phototropism, where they bend or grow toward a light source, and gravitropism, where they grow in response to gravity. The direction of light can influence the orientation and growth of plant stems and roots.
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Embryonic development covers fertilization, cleavage, formation of the blastula and gastrula, germ layers, organ formation and differentiation. Regeneration describes the replacement of lost tissues or body parts, whereas ageing involves gradual cellular and physiological changes linked to reduced repair, altered metabolism and declining organ function.
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