Figure 10.

Stomatal Conductance under Osmotic Stress.

Wild-type (Col-0) and nhx1 nhx2 mutant line L2 plants were grown in hydroponic culture in LAK medium with 1 mM KCl for 3 weeks. The rates of transpiration and photosynthesis were recorded with an infrared gas analyzer. Leaves were allowed to equilibrate before treatment for at least 10 min and were then subjected to osmotic shock by treatment with 20% PEG6000 (arrows). Shown is a representative experiment of five repetitions with independent plants.

(A) Stomatal conductance.

(B) Photosynthetic rate.