Figure 3.

Distribution of primary versus branched plasmodesmata (PD) between epidermal cells during tobacco leaf development. Total numbers of plasmodesmata examined for the different leaf regions were 315 for the base of first leaf, 474 for the tip of first leaf, 547 for the base of second leaf, 559 for the tip of second leaf, 380 for the base of third leaf, and 480 for the tip of third leaf. The plasmodesmata were counted from 200 to 300 cellular interfaces derived from two different tobacco plants.