Hydrogen Peroxide Supplementation in Irrigation Water Alleviates Drought Stress and Boosts Growth and Productivity of Potato Plants

Abstract

The present investigations aim to decipher the beneficial role of hydrogen peroxide-supplemented irrigation in imparting drought tolerance and promotion plant growth and yield of potato plants grown under two different irrigation regimes. Hydrogen peroxide injection (oxygenation) was applied at 0, 300, and 600 ppm through subsurface irrigation regimes on potato performance grown in heavy clay soil. The results indicated that oxygenation of irrigation water boosted the plant′s vegetative growth and productivity, especially at 600 ppm hydrogen peroxide coupled with deficit irrigation. Root respiration, leaf biomass, chlorophyll content, and leaf osmotic status was observed to be improved in the presence of oxygenated irrigation. A similar trend was recorded on macro-elements (nitrogen, phosphorus, potassium and calcium content), proline, and soluble carbohydrates content of leaf along with catalase enzyme activity. Individual tuber weight, tuber number and tuber yield per plant and hectare recorded higher values as responding to oxygenated irrigation (300 and 600 ppm) of water within the optimum irrigation level. While the highest value of water use efficiency (WUE) was obtained by pairing deficit irrigation with 600 ppm oxygenated water. Thus, the present work provides new insights into the importance of oxygenated irrigation in obtaining optimum yield and field performance in potato plants subjected to deficit irrigation in clayey-loamy soils.

Exogenous Application of Alpha-Lipoic Acid Mitigates Salt-Induced Oxidative Damage in Sorghum Plants through Regulation Growth, Leaf Pigments, Ionic Homeostasis, Antioxidant Enzymes, and Expression of Salt Stress Responsive Genes

“…Under abiotic stress conditions, increasing the activity of antioxidant enzymes is necessary for ROS elimination [9,45,53,54]. In this study, the activities of SOD, CAT, POX, and APX were significantly increased under saline conditions (Figure 4).…”

“…Under salt stress conditions, both the behavior of plants and their interaction with the stressful factor have been found to be extremely complex, leading to changes at the morphological, physiological, biochemical, and molecular levels [6,7]. This complexity can ultimately trigger varying degrees of stress adaptation among the salt-tolerant and sensitive plant species [8,9]. In this context, plants are developing diverse defense strategies and mechanisms to reduce the detrimental effects and toxicity of salt ions affecting different developmental stages and metabolic pathways.…”

Exogenous Nitric Oxide Reinforces Photosynthetic Efficiency, Osmolyte, Mineral Uptake, Antioxidant, Expression of Stress-Responsive Genes and Ameliorates the Effects of Salinity Stress in Wheat

“…Being sessile, plants are frequently confronted with various environmental stresses, resulting in considerable alternation in metabolism, which leads to a serious threat within the yield and crop production [1,2]. Among the key stress factors, salinity seriously affects the growth and development of plants [3][4][5].…”

Alpha Lipoic Acid as a Protective Mediator for Regulating the Defensive Responses of Wheat Plants against Sodic Alkaline Stress: Physiological, Biochemical and Molecular Aspects

“…It is well documented that under osmotic stress conditions, plants accumulate a high concentration of proline, soluble sugars, amino acids and other organic solutes [ 31 , 55 ]. This mechanism enables plants to regulate the osmotic potential and enhance the water uptake under stress conditions [ 21 , 56 ]. In this study, the accumulation of proline and soluble sugars is differently regulated by ALA treatment in the sodic alkaline stressed seedlings.…”