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NEET2006BotanyAnatomy of Flowering PlantsActual

In the sieve elements, which one of the following is the most likely function of P-proteins ?

Options

  1. ADeposition of callose on sieve plates
  2. BProviding energy for active translocation
  3. CAutolytic enzymes
  4. DSealing mechanism on wounding

Correct answer

D. Sealing mechanism on wounding

Step-by-step solution

Sieve elements are a component of phloem tissue and are responsible for conduction of food in plants. A sieve tube element has peripheral layer of cytoplasm without any nucleus. The central part is occupied by a network of canals which contain fibrils of p -protein. The protein is vibratite and is believed to actively participate in the transport of nutrients. One general property of its ability to form a gel and it functions as a puncture repair substance forming a plug at any site of damage in sieve element, thus

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