Impact of Exogenously Sprayed Antioxidants on Physio-Biochemical, Agronomic, and Quality Parameters of Potato in Salt-Affected Soil

Abstract

Salinity is one of the harsh environmental stresses that destructively impact potato growth and production, particularly in arid regions. Exogenously applied safe–efficient materials is a vital approach for ameliorating plant growth, productivity, and quality under salinity stress. This study aimed at investigating the impact of foliar spray using folic acid (FA), ascorbic acid (AA), and salicylic acid (SA) at different concentrations (100, 150, or 200 mg/L) on plant growth, physiochemical ingredients, antioxidant defense system, tuber yield, and quality of potato (Solanum tuberosum L cv. Spunta) grown in salt-affected soil (EC = 7.14 dS/m) during two growing seasons. The exogenously applied antioxidant materials (FA, AA, and SA) significantly enhanced growth attributes (plant height, shoot fresh and dry weight, and leaves area), photosynthetic pigments (chlorophyll a and b and carotenoids), gas exchange (net photosynthetic rate, Pn; transpiration rate, Tr; and stomatal conductance, gs), nutrient content (N, P, and K), K+/ Na+ ratio, nonenzymatic antioxidant compounds (proline and soluble sugar content), enzymatic antioxidants (catalase (CAT), peroxidase (POX), superoxide dismutase (SOD), and ascorbate peroxidase (APX)) tuber yield traits, and tuber quality (dry matter, protein, starch percentage, total carbohydrates, and sugars percentage) compared with untreated plants in both seasons. Otherwise, exogenous application significantly decreased Na+ and Cl− compared to the untreated control under salt stress conditions. Among the assessed treatments, the applied foliar of AA at a rate of 200 mg/L was more effective in promoting salt tolerance, which can be employed in reducing the losses caused by salinity stress in potato grown in salt-affected soils.

Polyamines mitigate the destructive impacts of salinity stress by enhancing photosynthetic capacity, antioxidant defense system and upregulation of calvin cycle-related genes in rapeseed (Brassica napus L.)

“…Furthermore, better understanding tolerance mechanisms and identifying important and reliable biochemical and physiological parameters associated with salt tolerance is required ( ElSayed et al, 2018 , Desoky et al, 2021b ). The photosynthesis, CO 2 assimilation and plant growth are frequently hampered by salt stress ( ElSayed et al, 2021 , Selem et al, 2022 ). In the current study, salinity decreased biomass, total chlorophyll, CO 2 assimilation rate, and PSII (ΦPSII) in rapeseed plants ( Fig.…”

Rebalancing Nutrients, Reinforcing Antioxidant and Osmoregulatory Capacity, and Improving Yield Quality in Drought-Stressed Phaseolus vulgaris by Foliar Application of a Bee-Honey Solution

“…The major vital components of the BHS have previously been used individually as foliar applications with success supporting plant performance and increasing its resistance to stress, e.g., organic acids [ 63 ], soluble sugars [ 64 , 65 ], amino acids [ 66 , 67 , 68 ], proline [ 66 , 69 ], essential nutrients [ 70 , 71 , 72 ], ascorbate [ 73 ], B-group vitamins [ 74 , 75 ], selenium [ 7 ], and iodine [ 76 ]. In this paper, all of these components are combined into a solution (BHS) in organic forms, giving this solution a multi-mechanism for plants to adjust to stress conditions and resist stress via signaling pathways and efficient mechanisms.…”

Salt stress resilience in plants mediated through osmolyte accumulation and its crosstalk mechanism with phytohormones

“…Therefore, crops cannot be cultivated if soil salinity is not controlled and rises above specified salinity thresholds ( FAO, 2017 ). Among abiotic stresses, salinity affects plant growth by hampering photosynthesis, CO 2 assimilation and excessive ROS production ( Chaudhary and Choudhary, 2021 ; ElSayed et al, 2021 ; Selem et al, 2022 ). The detrimental effects of salinity begin with osmotic or water stress (a reduction in the root’s ability to absorb water), followed by ionic toxicity (nutritional imbalance, formation of ROS species), hormonal imbalance and susceptibility to infection by the pathogen ( Choudhary et al, 2017 ; Talbi et al, 2018 ).…”