Title : Compatible osmolytes in succulent and non-succulent halophytic plants and their utilization for sustainability
Salinity affects approximately 7% of the world’s land area, which is increasing deliberately throughout the globe. The constraints are more acute in the areas of the world where food distribution is problematic because of insufficient infrastructure or political instability. As salinity stress is a continuing and increasingly deleterious obstacle to the growth and yield of crop plants, the engineering of salt tolerant crop plants is a long – held objective. Halophytic plant species are those which are naturally selected in salt stress environments and are distinct from glycophytes. The effect of salt and water stress can be seen in the changes to osmolarity, leaf water potential and accumulation of osmolytes to control the cell turgor pressure. Hence, these plants have basic strategy for their metabolic activities under salt stress conditions via compatible solutes. Accumulation of osmolytic elements in succulent and non-succulent halophytic plants species were noted for studying the adaptation and potential of these halophytic species to either tolerate saline stress or to avoid stress from different types of saline habitats. Amino acid content in the leaf of succulent species were ranging from 3 to 979 µg.g-1 d. wt. for proline, where as in non-succulent plants were observed to be 207 to 363 µg.g-1 d. wt. Hence, the concentration of proline determines the role in adaptability of these plants to survive in the salt stress conditions. Likewise, the results of ion concentration and other amino acids will be highlighted in the work. These halophytes are also extensively utilized in the aspect of ecological as well as economical. Some of the species like Suaeda fruticosa and Salicornia brachiate have high content of proteins, hence high nutritive values, whereas the majority of the non-succulent halophytic species are good soil binders.