Abstract
Soil salinity is one of the most important abiotic stress that limit crop production. Tomato (Solanum lycopersicum L.) is moderately tolerant to salinity and is typically cultivated in regions that are exposed to soil salinization. The aim of the study was to characterize phenotype response to salt stress under in vitro conditions of fourteen tomato genotypes. The shortest root length was observed entries BD-7260 at 250 mM. Longer roots (11.6 cm) were developed by the plants from the solutions containing 50 mM NaCl in entries BD-7302. NaCl concentration in the medium significantly affected the root length and plant weight of tomato. Genotypic distribution of weight LS means revealed that genotypes BARI-2 and the Line BD-7292 is the highest performed and the Line BD-7762 is the lowest performed. These findings indicated some salt tolerant tomato genotypes which will be promising for future hybridization program. Analysis of novel genes as well as some previously identified genes such as PIPs, LTPs, AGPs, PRPs, GRPs etc. which showed protective roles in different abiotic stresses to other crops is quiet necessary and the presence and expression pattern of those genes in these screened genotypes of tomato will provide powerful information for over-expression of those genes in transgenic plants those will confer salt tolerances to the cultivated tomato varieties.
Highlights
High salinity is one of the major stress factors among the abiotic stresses
As saline soils and saline waters are common around the world, great effort has been devoted to understand its physiological aspects of tolerance to salinity in plants, as a basis for plant breeders to develop salinity-tolerant genotypes
The root length and fresh weight were measured and the results obtained from these studies have been presented and discussed separately under different heading
Summary
About 400 million hectares of land are affected by high salinity. As saline soils and saline waters are common around the world, great effort has been devoted to understand its physiological aspects of tolerance to salinity in plants, as a basis for plant breeders to develop salinity-tolerant genotypes. In spite of this great effort, only a small number of cultivars, partially tolerant to salinity, have been developed. As salinity affects almost every aspect of the physiology and biochemistry of the plant, the enhancement of crop salt tolerance will require the combination of several too many physiological traits [1,2,3], not those directly influencing yield. As salinity in soils is variable and plant tolerance depends on the stage of plant development, plants should be phenotype at several salinity concentrations and at the most sensitive plant stage(s)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
