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Paper Information

Title: 

THE EFFECTS OF NACL SALINITY ON THE GROWTH AND MINERAL UPTAKE OF TEHRAN PINE (PINUS ELDARICA M.)

Type: PAPER
Author(s): SADEGHI HAMID*
 
 *DEPT. OF PLANT BIOLOGY, ISLAMIC AZAD UNIVERSITY , JAHROM BRANCH, JAHROM
 
Name of Seminar: HAMAYESHE MANTAGHEI KARBORD FANAVARIHAYE NOVIN DAR KESHAVARZI
Type of Seminar:  CONGRESS
Sponsor:  Islamic Azad University, Shiraz
Date:  2008Volume 1
 
 
Abstract: 

DIFFERENT ASPECTS OF THE SALT STRESS EFFECTS ON PLANT GROWTH PARAMETERS SUCH AS GROWTH RATE AND TOTAL BIOMASS PRODUCTION, MINERAL UPTAKE,  ION COMPETITION AND THE RATE OF SALINITY TOLERANCE IN ONE-YEAR1386 OLD SEEDLINGS OF TEHRAN PINE (PINUS ELDARICA M.) GROWN IN GREENHOUSE, WERE INVESTIGATED BY THE USE OF NACL IN DIFFERENT CONCENTRATIONS. EXPERIMENTS WERE COMPLETELY RANDOMLY DESIGNED AND SIX DIFFERENT TREATMENTS WERE CONSIDERED BY THE ADDITION OF 0, 25, 50, 100, 150 AND 200 MILL MOLARS NACL TO THE NUTRIENT BASAL SOLUTION (ELECTRO CONDUCTIVITY OF THE SOLUTION WAS 1, 3.1, 6, 10.4, 14.5 AND 19.6 MSCM-1 RESPECTIVELY). THE RESULTS OF THIS STUDY SHOWED THAT THE INCREASE OF THE CONCENTRATION OF NACL OVER 50 MILL MOLARS DECREASES THE RATE OF GROWTH. THIS CONCLUSION CORRELATED WITH THE COMPARISON OF THE MEAN TOTAL BIOMASS BY DUNCAN TEST. THE RESULTS OF THE RECENT ANALYSIS INDICATED THAT REGARDING THE TOTAL BIOMASS REDUCTION THE LEAVES ARE MORE SENSITIVE TO THE INCREASE OF NACL CONCENTRATION THAN THE ROOTS AND STEMS. THE RAISED LEVEL OF SODIUM AND LOWERED LEVEL OF POTASSIUM AS A CONSEQUENCE OF THE INCREASED LEVEL OF THE SALT STRESS UP TO 150 MILL MOLARS IN THE ALL THREE ORGANS -ROOTS, STEMS AND LEAVES- WERE OBSERVED BUT IN REVERSE BY THE RAISE OF NACL LEVEL UP TO 200 MILL MOLARS THE NET ACCUMULATION OF SODIUM DECREASED. THE INCREASE CONCENTRATION OF NACL ACCOMPANIED BY SOME CHANGES IN THE ACCUMULATION OF OTHER MINERAL ELEMENTS SUCH AS THE INCREASED LEVEL OF NET ACCUMULATION OF MG IN ROOTS AND STEMS, THE RAISED LEVEL OF CA AND P IN LEAVES AND RELATIVELY HIGH LEVEL OF NITROGEN IN THE ALL THREE PLANT ORGANS.

 
Keyword(s): NACL, TEHRAN PINE, GROWTH PARAMETERS, MINERAL NUTRITION
 
 
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