Role of Amino Acids in Improving Abiotic Stress Tolerance to Plants

Fertigation of Ajwain (Trachyspermum ammi L.) with Fe-Glutamate Confers Better Plant Performance and Drought Tolerance in Comparison with FeSO4

“…Dinu et al [32] reported that glutamate has an important role in osmotic adjustment of the stomatal guard cells as it controls the opening and closing of the stomata. The endogenous excessive accumulation of the glutamate under normal or stressed conditions or through its exogenous application, confirms its role as a signaling molecule in ameliorating the deleterious effects of multiple abiotic stresses [31]. For example, the exogenous application of glutamate on Brassica compestris reduced the negative impacts of salt and osmotic stress [33].…”

“…An improvement in LRWC due to foliar-applied FeSO 4 and Fe-Glu was recorded but comparatively was found better in ajwain plants supplied with Fe-Glu. This more improvement in LRWC due to Fe-Glu foliar application might be the role of glutamate in cellular water relations [71] or its role in osmotic adjustment itself, or through its involvement in biosynthesis and accumulation of other amino acids that are important in improving the plant water relations through osmotic adjustment [31]. It is well known that glutamate is involved indirectly in the proline biosynthesis under stressful conditions [31,71].…”

“…This more improvement in LRWC due to Fe-Glu foliar application might be the role of glutamate in cellular water relations [71] or its role in osmotic adjustment itself, or through its involvement in biosynthesis and accumulation of other amino acids that are important in improving the plant water relations through osmotic adjustment [31]. It is well known that glutamate is involved indirectly in the proline biosynthesis under stressful conditions [31,71]. In the present study, Fe-Glu significantly improved the plant water relations, i.e., with increased accumulation of amino acids including proline and GB that might improve the plant cellular water status along with nutrient uptake [21,61].…”

“…Among different amino acids, glutamate plays multiple roles in growth improvement and other metabolic activities both under normal and stressful conditions. Studies revealed its role in the synthesis of lysine, arginine and orthenine as a precursor as well as its indirect role in various other metabolic activities [30,31]. Dinu et al [32] reported that glutamate has an important role in osmotic adjustment of the stomatal guard cells as it controls the opening and closing of the stomata.…”

Foliar Spray of Fe-Asp Confers Better Drought Tolerance in Sunflower as Compared with FeSO4: Yield Traits, Osmotic Adjustment, and Antioxidative Defense Mechanisms

“…The amino acid metabolism also plays important roles in improving plant tolerance to abiotic stresses via regulating different cellular metabolic activities [7,32]. Among different amino acids that play significant roles in surviving of plants under abiotic stresses, Asp is also of prime importance [33]. It belongs to a group of amino acids, namely, the Asp family, and is a precursor of other essential amino acids including isoleucine, methionine, and threonine.…”