BIOMOLECULES AND ENZYMES

Detailed explanation-1: -A plant that requires a long period of darkness is termed a “short-day” (long-night) plant. Short-day plants form flowers only when day length is less than about 12 hours. Many spring-and fall-flowering plants are short-day plants, including chrysanthemums, poinsettias and Christmas cactus.

Detailed explanation-2: -Short-day Plants Examples of short day plants include: chrysanthemum, rice, soybean, onion, violet, Christmas cactus, and poinsettia.

Detailed explanation-3: -If the dark period is interrupted by flashes of light, short day type plant will not flower.

Detailed explanation-4: -Green grams, marijuana, cotton, soyabean, jowar and rice are examples of short day plants. Wheat, henbane, carnation, lettuce, barley and oats are the example of long day plants.

Detailed explanation-5: -Short day plants are also called long night plants because these plants require short days but long nights to be able to flower properly. The nights must be long and uninterrupted for them to flower. Such a dependency on the length of the day is called photoperiodism.