Abstract
Effect of five salt concentrations viz, 0, 130, 160, 190, 220 and 250 mM on germination and seedling growth of sorghum cultivars (Asian, Indian, Mycho and Summer graze) was evaluated under laboratory condition. Analysis of variance (ANOVA) revealed significant differences for germination percentage, plumule and radicle growth, fresh and dry weight for different salt concentrations except moisture contents. Inter cultivars genetic variation and concentration x cultivars interaction showed significant differences for all the parameters studied. Data for germination percentage, plumule and radicle growth, fresh and dry weight and moisture contents clearly demonstrated varietal differences. Though results clearly showed that salinity stress decreased all the parameters studied for sorghum cultivars significantly, tolerance of sorghum cultivars to such high levels of salt stress is worth mentioning and it can be suggested that sorghum can be tried for cultivation on moderately saline areas. Key words: germination percentage, plumule and radicle growth, fresh and dry weight, moisture contents.
Highlights
Salinity is one of the fore most important abiotic factors that retard the activity of embryo in arid and semi arid regions
The aim of the present study was to search out salinity stress tolerant sorghum cultivars for vast barren salt effected land of Pakistan
Maximum mean value (6.96 cm) for plumule growth was recorded in control, followed by 160 (2.94 cm), 190 (1.16 cm), 220 (0.45 cm) and 250 (0.43 cm) mM salt concentration, respectively
Summary
Salinity is one of the fore most important abiotic factors that retard the activity of embryo in arid and semi arid regions. Salinity affects seed germination by creating an external osmotic potential that prevents water uptake due to the toxic effects of sodium and chloride ions on the germinating seed (Khajeh-Hosseni, 2003; Kandil et al, 2012). Plants differ in their ability, to develop under saline conditions (Greenway and Munns, 1980; Kandil et al, 2012). Though the study is preliminary, yet it will provide important clues and guide line for researchers to study further in this regard
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