Foliar application is an effective method for incorporating selenium into peanut leaf proteins with antioxidant activities

2019 ◽  
Vol 126 ◽  
pp. 108617 ◽  
Author(s):  
Qi Gao ◽  
Zi-Heng Liu ◽  
Jia-Le Wu ◽  
Yi Geng ◽  
Qian Zhang ◽  
...  
Keyword(s):  
Foliar Application ◽  
Antioxidant Activities ◽  
Leaf Proteins

scholarly journals Improvement of antioxidant activities and yield of spring maize through seed priming and foliar application of plant growth regulators under heat stress conditions

2017 ◽  
Vol 38 (1) ◽  
pp. 47 ◽  
Author(s):  
Ijaz Ahmad ◽  
Shehzad Maqsood Ahmed Basra ◽  
Muhammad Akram ◽  
Allah Wasaya ◽  
Muhammad Ansar ◽  
...  
Keyword(s):  
Heat Stress ◽  
Grain Yield ◽  
Foliar Application ◽  
Antioxidant Activities ◽  
Foliar Spray ◽  
Seed Priming ◽  
Chlorophyll Contents ◽  
Exogenous Application ◽  
Hybrid Maize

Heat stress during reproductive and grain filling phases adversely affects the growth of cereals through reduction in grain’s number and size. However, exogenous application of antioxidants, plant growth regulators and osmoprotectants may be helpful to minimize these heat induced yield losses in cereals. This two year study was conducted to evaluate the role of exogenous application of ascorbic acid (AsA), salicylic acid (SA) and hydrogen peroxide (H2O2) applied through seed priming or foliar spray on biochemical, physiological, morphological and yield related traits, grain yield and quality of late spring sown hybrid maize. The experiment was conducted in the spring season of 2007 and 2008. We observed that application of AsA, SA and H2O2 applied through seed priming or foliar spray improved the physiological, biochemical, morphological and yield related traits, grain yield and grain quality of late spring sown maize in both years. In both years, we observed higher superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD) activity in the plants where AsA, SA and H2O2were applied through seed priming or foliar spray than control. Membrane stability index (MSI), relative water contents (RWC), chlorophyll contents, grain yield and grain oil contents were also improved by exogenous application of AsA, SA and H2O2 in both years. Seed priming of AsA, SA and H2O2was equally effective as the foliar application. In conclusion, seed priming with AsA, SA and H2O2 may be opted to lessen the heat induced yield losses in late sown spring hybrid maize. Heat tolerance induced by ASA, SA and H2O2 may be attributed to increase in antioxidant activities and MSI which maintained RWC and chlorophyll contents in maize resulting in better grain yield in heat stress conditions.

scholarly journals Relief Role of Lysine Chelated Zinc (Zn) on 6-Week-Old Maize Plants under Tannery Wastewater Irrigation Stress

2020 ◽  
Vol 17 (14) ◽  
pp. 5161
Author(s):  
Rehan Ahmad ◽  
Wajid Ishaque ◽  
Mumtaz Khan ◽  
Umair Ashraf ◽  
Muhammad Atif Riaz ◽  
...  
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Plant Growth ◽  
Foliar Application ◽  
Antioxidant Activities ◽  
Foliar Spray ◽  
Tannery Wastewater ◽  
Organic Load ◽  
Maize Plants

Tannery wastewater mainly comes from leather industries. It has high organic load, high salinity, and many other pollutants, including chromium (Cr). Tannery wastewater is generally used for crop irrigation in some areas of Pakistan and worldwide, due to the low availability of good quality of irrigation water. As tannery wastewater has many nutrients in it, its lower concentration benefits the plant growth, but at a higher concentration, it damages the plants. Chromium in tannery wastewater accumulates in plants, and causes stress at physiological and biochemical levels. In recent times, the role of micronutrient-amino acid chelated compounds has been found to be helpful in reducing abiotic stress in plants. In our present study, we used lysine chelated zinc (Zn-lys) as foliar application on maize (Zea mays L.), growing in different concentrations of tannery wastewater. Zinc (Zn) is required by plants for growth, and lysine is an essential amino acid. Maize plants were grown in tannery wastewater in four concentrations (0, 25%, 50%, and 100%) and Zn-lys was applied as a foliar spray in three concentrations (0 mM, 12.5 mM, and 25 mM) during plant growth. Plants were cautiously harvested right after 6 weeks of treatment. Foliar spray of Zn-lys on maize increased the biomass and improved the plant growth. Photosynthetic pigments such as total chlorophyll, chlorophyll a, chlorophyll b and contents of carotenoids also increased with Zn-lys application. In contrast to control plants, the hydrogen peroxide (H2O2) contents were increased up to 12%, 50%, and 68% in leaves, as well as 16%, 51% and 89% in roots at 25%, 50%, and 100% tannery water application, respectively, without Zn-lys treatments. Zn-lys significantly reduced the damages caused by oxidative stress in maize plant by decreasing the overproduction of H2O2 and malondialdehyde (MDA) in maize that were produced, due to the application of high amount of tannery wastewater alone. The total free amino acids and soluble protein decreased by 10%, 31% and 64% and 18%, 61% and 122% at 25%, 50% and 100% tannery water treatment. Zn-lys application increased the amino acids production and antioxidant activities in maize plants. Zn contents increased, and Cr contents decreased, in different parts of plants with Zn-lys application. Overall, a high concentration of tannery wastewater adversely affected the plant growth, but the supplementation of Zn-lys assertively affected the plant growth and enhanced the nutritional quality, by enhancing Zn and decreasing Cr levels in plants simultaneously irrigated with tannery wastewater.

scholarly journals Selenium Modulates Antioxidant Activity, Osmoprotectants, and Photosynthetic Efficiency of Onion under Saline Soil Conditions

Agronomy ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 855
Author(s):  
Wael M. Semida ◽  
Taia A. Abd El-Mageed ◽  
Abdelsattar Abdelkhalik ◽  
Khaulood A. Hemida ◽  
Hamdi A. Abdurrahman ◽  
...  
Keyword(s):  
Photosynthetic Efficiency ◽  
Field Experiments ◽  
Foliar Application ◽  
Negative Impact ◽  
Antioxidant Activities ◽  
Saline Soil ◽  
Soluble Sugars ◽  
Soil Condition ◽  
Soil Conditions ◽  
Bulb Yield

Selenium (Se) has been recently reported to play a crucial role in ameliorating the negative impact of abiotic stress, including salinity, on several plant species. Two field experiments (2016/17 and 2017/18) were carried out to investigate the possible effect of exogenous Se application at two levels (25, 50 mg L−1) on growth, bulb yield, physio-biochemical attributes, and antioxidant activities of onion grown under saline (5.25 dS m−1) soil condition. Se (25 or 50 mg L−1) foliar application enhanced growth characteristics, as well as membrane stability index (MSI) and relative water content (RWC) as a result of the osmotic adjustment by accumulating more osmoprotectants and enhancing the activity of antioxidants defense system, thus improving photosynthetic efficiency and bulb yield. Proline, glycine betaine, choline, and total soluble sugars content were higher in leaves and bulbs of Se-treated plants under salt stress. Se (25 or 50 mg L−1) significantly increased the activities of enzymatic (ascorbate peroxidase, superoxide dismutase, and catalase) and non-enzymatic (ascorbic acid and glutathione) antioxidants in both leaves and bulbs of salt-stressed onion. Se application at 25–50 mg L−1 may find, in the future, a potential application as anti-abiotic stresses for improving plant growth and productivity under saline soil condition.

scholarly journals Biomass Accumulation, Photosynthetic Pigments, Osmotic Adjustments and Antioxidant Activities of Leymus chinensis in Response to BA, BR, and GA

2019 ◽  
Vol 37 ◽  
Author(s):  
Z. XUE-FENG ◽  
L.V. JUN ◽  
M. SHAHID ◽  
S.A. ANJUM ◽  
L. NA-JIA ◽  
...  
Keyword(s):  
Plant Growth ◽  
Photosynthetic Pigments ◽  
Foliar Application ◽  
Antioxidant Activities ◽  
Block Design ◽  
Biomass Accumulation ◽  
Leymus Chinensis ◽  
Growth Substances ◽  
Potential Yield ◽  
Plant Growth Substances

ABSTRACT: Abiotic stresses and poor biomass accumulation are chief constraints to accomplish potential yield in Leymus chinensis. An experiment was conducted to improve biomass and correlation of biomass accumulating attributes with photosynthetic pigments, osmotic substances and antioxidants under foliar application of different plant growth substances. The experiment was conducted at inner Mongolia Xilinguole, China, using a Randomized Complete Block Design and 5 replications. The treatments consisted of water (control); BA5 = application of BA (6-benzylaminopurine) at 5 mg L-1; BA25 = application of BA at 25 mg L-1; BA50 = application of BA at 50 mg L-1; BR0.02 = application of BR (brassinosteroid) at 0.02 g L-1; BR0.2 = application of BR at 0.2 mg L 1; BR2 = application of BR at 2 mg L-1; GA10 = application of GA (gibberellic acid) at 10 mg L-1; GA50 = application of GA at 50 mg L-1 and GA100 = application of GA at 100 mg L-1. Application of all plant growth substances significantly improved biomass, osmotic adjustments, photosynthetic pigments and antioxidant activities compared to control. However, the most promising results were found with 0.2 mg L-1 BR. The highest chlorophyll a/b, glutathione and ascorbate peroxidase activities were recorded with 25 mg L-1 BA. Conclusively, 25 mg L-1 BA, 0.2 mg L-1 BR and 10 mg L-1 GA exhibited more promising results than other concentrations for the evaluated attributes.

scholarly journals Improvement of drought tolerance in five different cultivars of Vicia faba with foliar application of ascorbic acid or silicon

2020 ◽  
Vol 18 (2) ◽  
pp. e0802
Author(s):  
El-Sayed M. Desoky ◽  
Elsayed Mansour ◽  
Mohamed A. T. Yasin ◽  
El-Sayed E. A. El-Sobky ◽  
Mostafa M. Rady
Keyword(s):  
Lipid Peroxidation ◽  
Ascorbic Acid ◽  
Drought Tolerance ◽  
Seed Yield ◽  
Foliar Application ◽  
Antioxidant Activities ◽  
Positive Association ◽  
Severe Drought ◽  
Gas Exchange Parameters ◽  
Physiological Attributes

Aim of study: To explore the role of ascorbic acid (AsA) or silicon (Si) in improving drought tolerance in five faba bean cultivars under irrigation water deficit (IWD).Area of study: The experimental farm; 30° 36′ N, 32° 16′ E, Egypt.Material and methods: Three drip irrigation regimes (WW, well-watered, 4000 m3 water ha-1; MD, moderate drought, 3000 m3 water ha-1; and SD, severe drought, 2000 m3 water ha-1) were applied to plants, which were sprayed 25, 40, and 55 days after sowing with 1.5 mM AsA or 2.0 mM Si vs distilled water as a control.Main results: Drought negatively affected physiological attributes (photosynthetic pigments, gas exchange parameters, relative water content, membrane stability index, electrolyte leakage (EL), and lipid peroxidation), which restricted plant growth and yields, and stimulated alterations in both enzymatic and non-enzymatic antioxidant activities. However, AsA or Si application mitigated drought effects on physiological attributes, improving growth, yields and water use efficiency by raising antioxidant activities and suppressing lipid peroxidation and EL in stressful cultivars. The mitigating effects of AsA and Si were more pronounced under MD.Research highlights: ‘Nubaria-2’, ‘Giza-843’, and ‘Sakha-3’ were more tolerant than ‘Giza-716’ and ‘Sakha-4’, suggesting the use of AsA or Si to ameliorate the IWD effects on stressful cultivars. Certain physiological traits exhibited positive association with growth and seed yield, demonstrating their importance in enhancing seed yield under irrigation treatments.

Comparative Effect of Salinity on Antioxidant Enzymes of Two Wheat Genotypes by Foliar Application of Salicylic Acid and Potassium

2020 ◽  
Vol 71 (9) ◽  
pp. 55-64
Author(s):  
Farzana Shaheen ◽  
Muhammad Yasin Ashraf ◽  
Zafar Iqbal Khan ◽  
Kafeel Ahmed ◽  
Jawaher Alkahtani ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Antioxidant Enzymes ◽  
Foliar Application ◽  
Antioxidant Activities ◽  
Foliar Spray ◽  
Grain Filling ◽  
Comparative Effect ◽  
Wheat Genotypes ◽  
Ameliorative Effect ◽  
Grain Filling Stage

The aim of this work was to examine the ameliorative effect of foliar application of salicylic acid and potassium on antioxidant enzymes activity in wheat under saline conditions. Two wheat genotypes WL-711 (salt tolerant) and Kohistan-97 (salt sensitive) were used with salicylic acid (SA) and potassium (K+) foliar spray which were applied at both vegetative and grain filling stage under saline conditions. Various enzymatic antioxidant activities include catalase (CAT), peroxidase (POD), superoxide dismutase (SOD) and ascorbate peroxidase (APX) was assesed. Result cleared that foliar spray of salicylic acid and potassium decreased the damaged effect of salinity in both wheat genotypes especially Kohistan-97 which was more salt sensitive. Overall, foliarly applied salicylic acid and potassium reduces the adverse effects of reactive oxygen species and antioxidant enzymes on cellular metabolism that was disturbed by salt stress.

scholarly journals PRE-HARVEST FOLIAR APPLICATION OF VEGETABLES EXTRACT IMPROVES THE QUALITY OF HARVESTED GRAPE

2019 ◽  
Vol 18 (6) ◽  
pp. 107-118
Author(s):  
Nadeem Akhtar Abbasi ◽  
Abdul Kareem ◽  
Ishfaq Ahmed Hafiz ◽  
Abdul Ahad Qureshi ◽  
Sherif Fathy EL-Gioushy
Keyword(s):  
Cold Storage ◽  
Foliar Application ◽  
Antioxidant Activities ◽  
Foliar Spray ◽  
Titratable Acidity ◽  
Vitis Vinifera L ◽  
Grape Berries ◽  
Fruit Decay ◽  
Dpph Scavenging

This study focused on examining the effect of vegetables extract foliar application on storage quality of the grapes grape (Vitis vinifera L. cvs. ‘Perlette’ and ‘King’s Ruby’). The vines were sprayed after fruit set twice at 15 days interval at concentrations of 0, 0.20%, 0.30% and 0.40%. Fruit were harvested and kept under cold-storage at 0.5 ±0.5°C and 90% RH for 28 days. The physicochemical properties of treated and untreated berries were analyzed at 7 days intervals during the cold storage. The results showed that the pre-harvest application of vegetable extracts reduced the weight loss and inhibited the fruit decay. Treated grape also had higher ascorbic acid contents, total phenolics, 2,2-diphenyl-1-picrylhydrazyl-radical (DPPH) scavenging activity, and higher soluble solid contents, titratable acidity, and reduced sugar:acid ratio. The concentration of 0.30% and cultivar ‘Kings Ruby’ gave the best result as compared to untreated control. In conclusion, pre-harvest vegetables extract application on berries showed higher antioxidant activities in grape berries, and maintained their post-harvest quality. These results indicated that foliar spray of vegetables extract could effectively improve the fruit quality, mainly through the reduction of phenolic content.

scholarly journals Effect of Vegetal- and Seaweed Extract-Based Biostimulants on Agronomical and Leaf Quality Traits of Plastic Tunnel-Grown Baby Lettuce under Four Regimes of Nitrogen Fertilization

Agronomy ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 571 ◽  
Author(s):  
Ida Di Mola ◽  
Eugenio Cozzolino ◽  
Lucia Ottaiano ◽  
Maria Giordano ◽  
Youssef Rouphael ◽  
...  
Keyword(s):  
Foliar Application ◽  
Antioxidant Activities ◽  
Photochemical Efficiency ◽  
Foliar Spray ◽  
Low Fertility ◽  
Seaweed Extract ◽  
Growth And Yield ◽  
Nitrate Content ◽  
Leaf Quality ◽  
N Rates

Nitrogen (N) fertilizers play a crucial role in agriculture, representing a powerful tool for farmers for increasing yields throughout the seasons under both optimal and suboptimal conditions. At the same time, their synthetic/chemical nature could have several influences on ecosystems and human health. For this reason, there is an urgent need to find new and more sustainable means of production to increase plant productivity and optimize nitrogen use. An experiment was conducted in a plastic tunnel to assess the response of baby lettuce crop to the foliar application of three plant biostimulants (PBs): Legume-derived protein hydrolysate (LDPH) ‘Trainer®’, tropical plant extract (TPE) ‘Auxym®’ and seaweed extract (SwE) from Ecklonia maxima ‘Kelpak®’ under different N rates of 0, 10, 20 and 30 kg N·ha−1. The responses of baby lettuce plants were assessed in terms of yield, growth parameters and physicochemical composition of the leaves. The fresh yield of baby lettuce in both biostimulant-treated and untreated plants was positively affected by increasing N rates from 0 to 20 kg N·ha−1, reaching a plateau thereafter indicating luxury N conditions at 30 kg N·ha−1. However, high N fertilizer application (20 and especially 30 kg N·ha−1) resulted in undesirable decreases in antioxidant activities and total ascorbic acid (TAA). Under non-fertilized regimens, foliar PBs application boost growth and yield of baby lettuce in comparison to non-treated plants. Foliar spray with LDPH and especially SwE elicited significant increases in marketable fresh yield (averaging 14%, 6% and 7% at 10, 20 and 30 kg N·ha−1, respectively) compared to TPE and untreated plants. Improved agronomical performance of baby lettuce under optimal (10 kg N ha−1) and especially suboptimal N regimens (0 kg N ha−1) was associated with increasing photochemical efficiency and a better activity of photosystem II (higher Soil Plant Analysis Development-SPAD index and chlorophyllous pigments biosynthesis). The application of LDPH enhanced antioxidant capacity and TAA in baby lettuce leaf and did not increased nitrate content as recorded in SwE and TPE treatments. Overall, plant biostimulants may be considered as a sustainable tool of production to increase leafy vegetable productivity in low fertility soils.

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