Abstract
An effective and simple screening technique for identification of salt tolerant and salt sensitive radish genotypes was observed. Sand is used as potting media. Six genotypes of radish were used for screening against four salinity levels (0, 1, 3, 5 and 7 dS/m-1). Twenty days old seedlings of radish were salinized with salt solution (NaCl). Morphological, physiological and ionic parameters were studied. Radish genotypes Laal-Pari and 40 Days executed the best performance in all the measured attributes and categorized as salt tolerant genotype while Green Neck was the poorest in retaining normal functioning at higher salinity levels thus grouped under salt sensitive cultivar.
Highlights
Salinity is a key abiotic stress dropping the yield of extensive variety of crops all over the world [1]
Keeping in mind the significance of salinity, an experiment was conducted to screen out the available radish (Raphanus sativus) germplasm to identify morpho-physiological and ionic attributes of salt sensitive and salt tolerant genotypes
The seedlings were adjusted to their final NaCl level by imposing the salinity in intervals while the control was without salt stress and irrigated only with half strength Hoagland’s solution
Summary
Salinity is a key abiotic stress dropping the yield of extensive variety of crops all over the world [1]. The ceiling of plant growth and productivity due to soil salinity is especially critical in. Salinity reduces the chlorophyll contents, photosynthetic rate, transpiration rate and stomatal conductance in salt susceptible plants and increases in salt tolerant plants. Many efforts have been made to minimize the harsh effect of salt stress on growth and productivity, most aiming on chemical enhancement that involves developing salt resistant cultivars, leaching of excessive soluble salts to lower soil depths from upper soil, highlighting soils containing salt layers at the surface, decreasing salt by gathering salt accumulating aerial plant parts in areas with insignificant irrigation water or rainfall for leaching, and promoting of saline soils under cropping and leaching [10]. Keeping in mind the significance of salinity, an experiment was conducted to screen out the available radish (Raphanus sativus) germplasm to identify morpho-physiological and ionic attributes of salt sensitive and salt tolerant genotypes
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