P-proteins mainly function in phloem to:
C fits best: Seal damaged sieve elements. Keep the PHLOEM TRANSLOCATION basics straight and Seal damaged sieve elements stands out as the precise answer. Avoid: A) Transport sucrose; B) Generate ATP; D) Synthesize starch. Light and flowering items often hinge on which photoreceptor or day-length rule is in play.
Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.
