MiRNA Control of Vegetative Phase Change in Trees
Figure 2
Vegetative phase change and miRNA expression in P. x canadensis.
(A) Leaf morphology. Scale bars indicate 2 cm for 1-month-old trees and 4 cm for the rest. (B) Transverse sections of petioles of 1-month- (left) and 1-year-old (right) trees. ab, abaxial. ad, adaxial. vb = vascular bundles. Scale bar indicates 200 µm. (C) Expression of miR156 and miR172, with U6 as loading control. (D) Expression of PcSPL3 and PcSPL9, measured by real-time RT-PCR, and normalized to PcACT. Error bars indicate standard deviation (s.d.). Asterix = significantly different from 1-month-old saplings, p<0.01, Student's t test.