Abstract
Reed (Phragmites communis) exhibits tolerance to salt stress, and keeps low Na concentration in the shoot under saline soil. It is thought that Reed has the mechanism to retranslocate Na to roots via the shoot-base ( basal part of the shoot ). In this study we measured the amount of ion transport through the shoot-base. Reed transported only 4.3% of Na absorbed by roots via the shoot-base, but rice(Oryza sativa L.cv.Nipponbare) transported 52.8%. These effects disappeared by the shoot-base hot girdling ( 3s with hot air ). On the other hand, the transport of KCl and Na2SO4 through the shoot-base was almost the same between reed and rice. These results suggest that Na specific transporter or channel may function in the shoot-base of reed.
