3.4. Leaf gas exchange
Compared with the plants grown under 1 mM NaCl, the treatment
with 91 mM NaCl significantly decreased the Pn, Gs, and Tr
values of all plants (Fig. 5). However, the reductions in the plants
with pumpkin roots were similar and obviously smaller than those
in the plants with cucumber roots (Fig. 5). Compared with those of
ungrafted and self-grafted cucumber, the Pn, Gs, and Tr of cucumber
grafted onto pumpkin were significantly higher under 91 mM
NaCl (Fig. 5).