Zinc and Paclobutrazol Mediated Regulation of Growth, Upregulating Antioxidant Aptitude and Plant Productivity of Pea Plants under Salinity

Abstract

Soil salinity is the main obstacle to worldwide sustainable productivity and food security. Zinc sulfate (Zn) and paclobutrazol (PBZ) as a cost-effective agent, has multiple biochemical functions in plant productivity. Meanwhile, their synergistic effects on inducing salt tolerance are indecisive and not often reported. A pot experiment was done for evaluating the defensive function of Zn (100 mg/L) or PBZ (200 mg/L) on salt (0, 50, 100 mM NaCl) affected pea plant growth, photosynthetic pigment, ions, antioxidant capacity, and yield. Salinity stress significantly reduces all growth and yield attributes of pea plants relative to nonsalinized treatment. This reduction was accompanied by a decline in chlorophyll, nitrogen, phosphorus, and potassium (K+), the ratio between K+ and sodium (Na+), as well as reduced glutathione (GSH) and glutathione reductase (GR). Alternatively, salinity increased Na+, carotenoid (CAR), proline (PRO), ascorbic acid (AsA), superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX) over nonsalinized treatment. Foliar spraying with Zn and PBZ under normal condition increased plant growth, nitrogen, phosphorus, potassium, K+/Na+ ratio, CAR, PRO, AsA, GSH, APX, GR, and yield and its quality, meanwhile decreased Na+ over nonsprayed plants. Application of Zn and PBZ counteracted the harmful effects of salinity on pea plants, by upregulating the antioxidant system, ion homeostasis, and improving chlorophyll biosynthesis that induced plant growth and yield components. In conclusion, Zn plus PBZ application at 30 and 45 days from sowing offset the injuries of salinity on pea plant growth and yield by upregulating the antioxidant capacity and increasing photosynthetic pigments.

Coupling effects of phosphorus fertilization source and rate on growth and ion accumulation of common bean under salinity stress

“…Also, a significant reduction in N, P, K + , Ca 2+ , and Mg 2+ , while Na + and Clincreased were found in salinity stress conditions in faba bean plants (Abdelhamid, Shokr & Bekheta, 2010;Rady et al, 2015). The decrease of N, P, and K + was observed in common bean plants irrigated with different concentrations of NaCl, while Na + increased in tissues (Dawood, Abdelhamid & Schmidhalter, 2014;Sofy et al, 2020b). In the present study, the highest rate of P (52.5 kg ha −1 ) resulted in a significant reduction of Na + content in the shoot and root of common bean.…”

Ameliorating the Adverse Effects of Tomato mosaic tobamovirus Infecting Tomato Plants in Egypt by Boosting Immunity in Tomato Plants Using Zinc Oxide Nanoparticles

“…In addition, Zn plays a crucial role in preserving the integrity of the cell membrane [ 28 ]. It is often used to produce proteins, elongation of cells, membrane function, and environmental stress resistance [ 29 , 30 ]. Furthermore, Faizan et al [ 31 ] revealed that ZnO-NPs treatment of the tomato plant resulted in a substantial increase in growth biomarkers.…”

Carbon Assimilation, Isotope Discrimination, Proline and Lipid Peroxidation Contribution to Barley (Hordeum vulgare) Salinity Tolerance

“…Elevation of salinity levels in the soil causes many adverse effects on barley growth because of the low osmotic potential of soil solution [ 3 ]. Salt stress induces various biochemical and physiological responses in plants and affects most of plant metabolic processes [ 1 , 4 ]. Alterations in the integrity of cell membranes [ 5 ], as well as inhibition of different enzymatic activities and photosynthesis [ 6 , 7 , 8 ], are among the main processes affected.…”