A quantitative assessment of germination parameters: the case of Capsicum annuum l.
Shumaila Sami and Ullah
Increasingsalinity stress may provide crops a great competitive environment to survive.The aim of the present study was to evaluate the effect of salinity (60mM & 80mM NaCl) on germination of osmo-primed (PEG 4000), hydro-primed (12 hour duration) and thermo-primed (4℃) sweet pepper seeds (Capsicum annuum L.) of two varieties namely Mercury and Ganga.The influence of different priming treatments was determined by applying 60mM and 80mM NaCl solutions to primed and unprimed seeds. The applied salt concentrations were chosen based on results relating to germination ability of seeds, obtained in the vegetative stage. Results revealed that germination percentage, germination performance and vigor of Ganga variety were influence by thermo-priming (4℃) as compared to non-primed seeds. Seeds mean germination time was greatly reduced by osmo-priming in variety Mercury at 80mM NaCl treatment in comparison to non-primed seeds. Water content and water use efficiency were also enhanced by all the given priming treatments. Response of both varieties was different. The non-primed and untreated Mercury seeds exhibit the poor performance by inhibiting the root-shoot ratio, shoot moisture content, leaf moisture content, root moisture content and reducing leaf area ratio as compared to primed seeds that increased both the length and weight of plant whereas; Ganga variety had a negative response to these parameters under primed and NaCl treatments. Similarly, total plant biomass was recorded least both in primed and non-primed seeds under salinity stress, suggesting that salinity reduce both fresh and dry mass of plant whereas; different priming strategies could contribute seed germination during stressful environment. The growth performance of test specie confirmed the degree of resistivity to various levels of induced sodium chloride stress indicating successful demonstration of priming technique will help agricultural industry to improve seed quality, vigor, germination rate and biomass prooduction.