Evaluation Response of Different Genotypes of Sugarcane to Absorb and Transfer of Nutrition Elements Affected Salinity Stress

Abstract

BACKGROUND: Salinity is one of the important a biotic stresses limiting growth and development and the capacity to tolerate salinity is a key factor in crop productivity. OBJECTIVES: The aim of this study was to evaluate the response of sugarcane varieties to uptake and transport of ionic elements under salinity stress. METHODS: This research was carried out to via factorial experiment based on completely randomized design with three replications along 2013 year. The treatments included salinity stress (S1: 0 ds.m-1 S2: 3 ds.m-1 S3: 6 ds.m-1 S4: 9 ds.m-1) and different genotypes (V1: IRC9904, V2: IRC9906, V3: C2, V4: IRC9901, V5: C3, V6: C4, V7: CP48-103, V8: CP57-614, V9: CP69-1062). Studied genotypes included of three old commercial varieties (CP69-1062, CP57-614, CP48-103), three new commercial varieties (IRC9901, IRC9904, IRC9906) and three clones tolerate salinity (C2, C3, C4). RESULT: According result of analysis of variance effect of different level of salinity, genotypes and interaction effect of treatment on all studied traits was significant at 1% probability level. Salinity stress decreased the concentration of potassium and calcium and also increased the concentration of sodium and chlorine in the roots and shoots, so reduced plant biomass, especially in more sensitive genotypes. It seems that in addition to the importance of the root in controlling the uptake of ionic elements, there are mechanisms in other organs that are involved in the uptake and transport of these elements and genotypes also affects it. CONCLUSION: Mean comparison result indicated the highest amount of sodium and chlorine transfer to the shoot was obtained from 9 ds.m-1 salinity level and IRC9906 variety and the lowest one belonged to 0 ds.m-1 salinity level and C4 clone.