Fig. 5.

Ectopic expression of the H⁺-PPase results in larger root systems. (A) Intact roots along with potting mix were removed from pots, exposing the root systems of 10-week-old, well watered plants. The intact root systems are shown for two representative control plants and two transgenic plants (representing lines XAVP1D-1 and XAVP1D-2). (B) Potting mix was removed from the intact root system of plants before the stress (as in A) by rinsing with water. The washed root mass was dried at 80°C for 1 week before measurement of dry weight (DW). Means (±SE) are shown for control plants (n = 6) and transgenic lines (n = 9) XAVP1D-1, XAVP1D-2, and XAVP1D-3 (three plants per line).