Down-regulation of aquaporins in roots leads to:
C fits best: Only in roots. Keep the WATER TRANSPORT basics straight and Only in roots stands out as the precise answer. Avoid: A) In all cells equally; B) In specialized tissues; D) Only in leaves. 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.
