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

 1997  190 AIIMSAIIMS 2006 Report Error

Solution:

In most angiospermic plants, sieve tube-elements of phloem, are P-protein, later is found in all dicots and in many monocots but it is absent in gymnosperms and cryptogams.
The main function of P-protein is in sealing off damaged sieve elements by plugging up sieve plate pores.