Question

In sieve elements, the possible function of P-proteins is

• A. Autolytic enzymes
• B. Sealing mechanism on wounding
• C. Providing energy for active translocation
• D. Deposition of callose on sieve plates

Answer 1

Answer: (B)

Sealing mechanism on wounding

P proteins (phloem proteins) are a category of proteins found in the sap of the sieve tubes of the phloem of Angiospermic plants. P proteins are usually found in phloem of dicot plants. They are very rarely reported in monocots. P proteins occur in different forms in the different developmental stages of sieve tubes. In sieve elements, the possible function of P-proteins is sealing mechanism on wounding.

So, the correct answer is 'Sealing mechanism on wounding.'