Genotypic differences in growth and ions accumulation in soybean under NaCL salinity and water stress conditions

Abstract

Salt and water stress tolerance of the seven soybean genotypes viz. BARI Soybean 6, BD 2329, BD 2342, AGS 95, BGH 02026, Galarsum and BD 2331 were evaluated for their performance at 0 and 100 mM NaCl under well watered & water stress (watering with 70% depletion of available water at wilting) conditions at the Banghabandhu Sheikh Mujibur Rahman Agricultural University, Salna, Gazipur. The results indicated that all the growth parameters like plant height, shoot dry weight, root dry weight and dry matter distribution in different plant parts of the genotypes sharply decreased when the plants were exposed to water stress, salt stress and, combined salt and water stress conditions. Among the genotypes reduction in dry matter production was the least in Galarsum and BD 2331 in both the salt stress and, the combined salt and water stress conditions. These genotypes also accumulated lower amount of Na+ and higher amount of K+ in leaf tissues under salt stress and, combined salt and water stress environments as compared to others.Bangladesh Agron. J. 2014, 17(1): 47-58

Genotypic variations in growth, yield and yield components of soybean genotypes under drought stress conditions

“…On the contrary, the shoot dry weight of tolerant genotypes Shohag, BARI Soybean-6, BARI Soybean-5 and BD2331 were affected the least by the stress. A similar finding was observed by Khan et al (2014) in soybean, Eureka et al (2000) and OO et al (2008) in mungbean. Leaf area has been frequently reported to have a close relationship with crop growth (OO et al, 2008;Anyia and Herzog, 2004).…”

“…The differences in plant height reduction among the genotypes mainly due to genotypic differences. Water stress induced reduction in plant height was also observed by Khan et al (2014) in soybean. The decrease in plant height could be resulted from a reduction in plant photosynthetic efficiency as reported by Hamid et al (1990).…”

“…Less leaf expansion, leaf growth reduction and leaf senescence acceleration might be responsible for lower leaf area. Khan et al (2014) in soybean and Samson and Helmut (2007) in cowpea reported earlier that water deficit stress reduced significantly the total leaf area. Krishnamoorthy (1993) reported that water stress causes a reduction in the size of leaves as because cell division in the leaf primordial ceases due to water stress.…”

Dry Matter Production and Seed Yield of Soybean as Affected by Post-Flowering Salinity and Water Stress

“…The reduction in relative shoot and root dry weight might be due to water shortage and sodium ionic damage. Khan et al (2014) also reported that relative shoot and root dry weight decreased significantly in soybean genotype under salt and water stress condition due to water shortage and sodium ionic damage.…”

“…Root dry weight slightly decreased under salt and water stress at all the growth stages. The reduction in root dry weight of soybean due to salt and water stress was also reported by Khan et al (2014 Relative shoot and root dry weight…”