ESTABLISHMENT OF STABLE NACL-RESISTANT RICE PLANT LINES FROM ANTHER CULTURE - DISTRIBUTION PATTERN OF K+ NA+ IN CALLUS AND PLANT-CELLS/

Soil salinity markedly suppresses the growth of rice (Oryza sativa L.) . We established rice anther culture to select for rice callus lines a dapted to NaCl stress and regenerated plant progenies resistant to a N aCl stress of E.C. 16-18 mS. When exposed to NaCl, NaCl-adapted rice c alli lost K+ and accumulated little Na+. Conversely, plant cells lost relatively little K+ and accumulated Na+. It is plausible that, NaCl-r esistant mechanisms are different at callus and plant level. The stabl e NaCl-resistant lines produced have potential use in elucidating the molecular mechanisms behind NaCl resistance in rice and in rice breedi ng.