The Effect of Paclobutrazol on Fruit Yield, Leaf Mineral Elements and Proline Content of Strawberry Cv. Selva under Saline Condition

摘要

Since strawberry plants (Fragaria X ananassa Duch.) are susceptible to salinity, therefore a reduction of negative effects of salt stress is needed in strawberry production. To investigate the interaction effects of paclobutrazol (PP_333) and salinityon fruit yield, leaf mineral elements and free proline content, three levels of NaCl [0, 5, 10 mM] were incorporated into the nutrient solution and four levels of PP_333 [0, 10, 20, 30 mg L~(-1)] were sprayed. Interaction of PP_333in 2 levels (20 and 30mg L~(-1) with 5 mM NaCl, showed increase in fruit yield. 10 mg L~(-1) of PP_333 reduced proline content at 5 mM NaCl salinity. 20 mg L~(-1) of PP_333 at 5 mM NaCl caused reduction in shoot sodium content. Similar result was also observed in the interaction of 20 and 30 mg L~(-1) of PP333 with 10 mM NaCl. PP_333 application also reduced root sodium content. All levels of PP_333 at 5 mM NaCl and 20 mg L~(-1) of PP_333 at 10 mM NaCl, increased shoot potassium content. PP_333 could overcome the increase in shoot and root chlorine content at 5 and 10 mM NaCl. PP_333 application decreased the electrolyte leakage induced by salinity at 5 and 10 mM. From the above results, effective role of PP_333 on fruit yield promoting and reducing damages of sodium and chlorine ions on strawberry plant has been proved.