چکیده:
Various resistances to salinity are due to plants genetically variations, and selection on the basis of one factor will not be a suitable criterion in measurement of resistance to salinity, therefore in choosing resistant varieties, it is necessary to notice to a set of resistant indexes to salinity, creating changes in physiology, anatomy and morphology of plant species. This research was conducted using a factorial experiment based on CRD design with 4 replication at research institute of forests and rangelands. Experimental treatments included a combination of three species
(S.rigida, S.dendroides and S.richteri) along with 7 salinity levels of 0, 100, 200, 300, 400, 500, and 600 mM concentrations. The purpose of this research was to investigate metabolites, accumulation in terms of compatibility or incompatibility value for salinity stress in three species. The results of physiology features measurement demonstrated that S.dendroides water potential is more than two others. Comparing of the measured characteristics, averages demonstrated that S.rigida and S.dendroides have reposed in one statistical group in terms of proline
concentration and significant different have with S.richteri. Also, increasing salinity levels leads to the highest proline concentration in S.richteri in salinity treatment of 400 mM. In all three species, it is seen that salinity increase reduces plants soluble carbohydrates concentration rate and it reveals that salinity have a negative effect on these
materials.
خلاصه ماشینی:
Effect of proline, soluble carbohydrates and water potential on resistance to salinity of three Salsola species (S.
In all three species, it is seen that salinity increase reduces plants soluble carbohydrates concentration rate and it reveals that salinity have a negative effect on these materials.
Results of analysis of variance indicated that plant specie significantly influenced the soluble carbohydrates content (P<0.
Interaction effect of salinity* species was significant on soluble carbohydrates content at P<0.
In all three species, it is seen that salinity increase reduces plants soluble carbohydrates concentration (Fig. 2).
Results of analysis of variance showed that salinity have had significant different negative influence on water potential of plant (Table 1).
Salinity cause decrease of water potential, among influence was observed different species, significant at P<0.
Discussion and conclusions Soil salinity puts the plant under effect of physiologic drought tension because of increasing the dissolved osmotic potential of soil.
richteri specie during salinity care 400 mm and the result can show that plant S.
Chaparzade in 1996 during studying the effects of salinity tension and Ca 2+ an alfalfa plant showed that salinity causes proline increase in root and aerial organs and protein and amylum of aerial units were increased by salinity increase, but inversely dissolved carbohydrates amount was decreased(Chaparzade, 1996).
Other metabolites which were attended in this study are dissolved carbohydrates that in all 3 under experiment plants its concentration amount was decreased by salinity increase.
Outcome results of this research show that plant water potential decreases meaningfully by increase of salinity tension.