Evaluation of germination and some morph physiological traits of Prosopisfarcta (Banks & Sol.) under salinity stress
Subject Areas :Azam Jamshidizadeh 1 , masoumeh Farzaneh 2 , afrasiab Rahnama ghahfarokhi 3 , fatemeh Nasernakhaei 4
1 - Department of Agronomy and plant breeding, Shahid Chemran University of Ahvaz, khuzestan
2 - Department of Agronomy and plant breeding, ShahidChemranUniversity of Ahvaz, Khuzestan,Iran
3 - Department of Agronomy and plant breeding, ShahidChemranUniversity of Ahvaz, Khuzestan,Iran
4 - Department of Agronomy and plant breeding, ShahidChemranUniversity of Ahvaz, Khuzestan,Iran.
Keywords: Relative water content, tolerance index, logistic model, Root lateral branches,
Abstract :
In order to investigate the germination and growth characteristics of Prosopisfarcta two experiments were conducted separately, under salinity stress. Germination experiment was done in a completely randomized design with 9 levels of salinity stresses (0, 5, 10, 15, 20, 25, 30, 35 and 40 dS.m-1 concentrations) with four replications in lab. Seedling experiment was performed in a random complete block design consisted of five levels of concentration (tap water, 10, 20, 30 and 40 dS.m-1) with three replications as pot in non-shade greenhouse of Agricultural College of ShahidChamran University of Ahvaz.The results showed that by rising salt to 20 dS.m-1, declined percentage germination, Radicle length, Plumule length and seedling dry weight about 50%. Salinity stress data were fitted to a three-parameter logistic for seedling stage, showed salinity level more than 30.82 dS/m-1 led to 50 percent reduction of shoot dry weight. It found that 20.37 and 27.53 dS.m-1 caused a 50% decrease in dry weight and long of main root recpectively. Sustainment 50% of the relative water content of the leaf and 78% root branches in high salinity levels (50 dS.m-1) can be sign of high tolerance to this plant at high salinity concentrations.
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