Salt Stess on Soybean (Glycine max L Merr): Improving Salt Stress Tolerance through Seed Priming

Suryaman, Maman and Saepudin, Adam and Natawijaya, Dedi and Zumani, Darul (2012) Salt Stess on Soybean (Glycine max L Merr): Improving Salt Stress Tolerance through Seed Priming. INTERNATIONAL JOURNAL OF SCIENTIFIC & TECHNOLOGY RESEARCH, 1.

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Abstract

Abstract— Soybean seeds rapidly deteriorate or loss of viability and vigor, especially in stress conditions including by saline. This study was aimed to obtain the best seed viability and vigor of soybean treated by seed priming under salt stress. This study used a randomized completely block design with factorial pattern. First factor was the saline stress of NaCl concentration (C) which consisted of three levels (c0 = 0%, 0.5% = c1, c2 = 1%).Second factor was the treatment of seed priming (P) that consisted of 4 levels (p0 = hydropriming, p1 = osmopriming, p2 = matripriming, p3 = vitamin priming). The experiment was repeated three times. Data collected consisted of: germination capacity, germination rate, hypocotyl and epicotyl length, the weight of seedling, and the electrical conductivity. Data were analyzed by analysis of variance followed by Duncan's multiple range test at 5 percent. The results showed that osmopriming, matripriming, and vitamin priming improved total germination and germination rate of soybean seeds under salinity stress, while seed priming with hydropriming caused significantly the reduction of germination total and germination rate in salinity stress of 1 percent. Increased salinity stress from 0 to 1 percent caused a reduction in hypocotyl and epicotyl length, different with osmopriming, matripriming, and vitamin priming that produced hypocotyl and epicotyl longer than hydropriming. In all seed primings, increased salinity stress from 0 to 1 percent lowered the weight of seedlings, and most drastic reduction of seedling weight occurred in seeds treated with hydropriming. Among seed priming treatments, osmopriming, matripriming, and vitamin priming were more able to reduce membrane leakage compared to hydropriming as indicated by lower electrical conductivity rates contributing the increase in tolerance to salt stress and high in seed viability and vigor. Key words — germination, salt stress tolerance, seed priming, electrical conductivity, soybean

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