scholarly journals Effect of Humic and Salicylic Acids Foliar Application in The Chemical Content of Papaya Seedlings

2021 ◽  
Vol 910 (1) ◽  
pp. 012039
Author(s):  
Muhammad Hadi Ali Al-Abadi ◽  
Ali Muhammad Abd Al-hayany
Keyword(s):  
Salicylic Acid ◽  
Humic Acid ◽  
Environmental Conditions ◽  
Foliar Application ◽  
Proline Content ◽  
Chemical Content ◽  
High Concentrations ◽  
Salicylic Acids

Abstract The experiment was carried out on Papaya seedlings (2 months old) to determine the effect of humic acid (HA) and Salicylic acid (SA) on seedlings growth under local environmental conditions of in a private orchard in Diyala governorate. Humic acid (HA) sprayed at 4 concentrations (0, 1, 2 and 3%), whereas Salicylic acid (SA) was used at three concentrations (0, 200 and 400 mg.L-1). The results showed that spraying with the high concentrations of both acids gave the best results in most studied traits, in addition these treatments decreased significantly leaves proline content.

Disinfection performance of nanosilver and impacts of environmental conditions on viral inactivation by nanosilver

2013 ◽  
Vol 14 (1) ◽  
pp. 150-157 ◽  
Author(s):  
Yang Xu ◽  
Xiaona Chu ◽  
Jiangyong Hu ◽  
Say Leong Ong
Keyword(s):  
Escherichia Coli ◽  
Silver Nanoparticles ◽  
Humic Acid ◽  
Ionic Strength ◽  
Environmental Conditions ◽  
Contact Time ◽  
Chloride Ion ◽  
Viral Inactivation ◽  
E Coli ◽  
High Concentrations

Three types of nanosilver materials, which were commercial, chemically-synthesized and biologically-synthesized, respectively, were compared in terms of the disinfection efficiencies against Escherichia coli and MS2 coliphage in order to pinpoint promising material with the best performance. Disinfection results showed biologically-synthesized silver nanoparticles (referred to hereafter as ‘bio-AgNPs’) had the best disinfection performance, 10 mg/L of which was able to inactivate all the E. coli in 1 min (>6 log removals) and achieved 4 log removals of MS2 coliphage. Bio-AgNPs were therefore selected for further study in terms of effects of the concentration and contact time as well as the impacts of environmental conditions on the viral inactivation. Given the viral inactivation profile of bio-AgNPs shown in this study, it could be concluded that viral inactivation by bio-AgNPs could be inhibited by total organic carbon (TOC) (10 mg/L as humic acid) and chloride ion (5 mg/L) to a large extent while Ca2+/Mg2+/ionic strength only had minor effects on the viral inactivation at high concentrations (188 mg/L as CaCO3 of hardness or 5.6 mM of ionic strength, respectively). This part of the study may help enlighten further mechanism studies on viral inactivation by nanosilver.

scholarly journals Effect of Pgrs and Nutrients on Growth, Nitrate Reductase Activity, Soluble Protein, Proline Content and Yield in Bhendi Hybrid Under Salinity

2017 ◽  
Vol 5 (1) ◽  
pp. 81-87
Author(s):  
Vishnuveni Murugan ◽  
Sivakumar Rathinavelu ◽  
Nandhitha Krishnadevaraj ◽  
Chandrasekaran Perumal
Keyword(s):  
Salicylic Acid ◽  
Nitrate Reductase ◽  
Plant Growth ◽  
Soluble Protein ◽  
Nitrate Reductase Activity ◽  
Foliar Application ◽  
Reductase Activity ◽  
Foliar Spray ◽  
Proline Content ◽  
Saline Condition

An experiment was conducted to study the effect of PGRs { gibberellic acid (10 ppm), brassinolide (0.5 ppm), salicylic acid (100 ppm), ascorbic acid (100 ppm), benzyl amino purine (5 ppm)} and nutrients { K2SO4 (0.5%) + FeSO4 (0.5%) + Borax (0.3%) mixture and 19:19:19 (1%) mixture} on growth, NR enzyme activity, proline, soluble protein content and yield of bhendi hybrid (COBh H 1) under saline condition. The treatments were given at 25 and 45 DAS as foliar spray. The results showed that, nitrate reductase activity, soluble protein and plant growth were reduced under saline condition where as proline content was increased compared to absolute control. Foliar application of PGRs and nutrients enhanced the NR activity, proline, soluble protein and plant growth under saline condition. Among the PGRs and nutrients, foliar application of salicylic acid (100 ppm) and brassinolide (0.5 ppm) showed the better performance to mitigate the effect of salinity.

scholarly journals EFFECT OF SALICYLIC ACID FOLIAR APPLICATION ON Vitis vinifera L. cv. ‘SULTANA’ UNDER SALINITY STRESS

2019 ◽  
Vol 18 (2) ◽  
Author(s):  
Mehdi Oraei ◽  
Gholamreza Gohari ◽  
Sima Panahirad ◽  
Elnaz Zareei ◽  
Fariborz Zaare-Nahandi
Keyword(s):  
Salicylic Acid ◽  
Salinity Stress ◽  
Electrolyte Leakage ◽  
Foliar Application ◽  
Enzymatic Activities ◽  
Proline Content ◽  
Vitis Vinifera L ◽  
Salinity Condition ◽  
Current Survey ◽  
Exogenous Salicylic Acid

The current survey aimed to study the effect of exogenous salicylic acid (SA) application on salinity stress of grapevine cv. ’Sultana’. The leaves of hydroponically cultivated grapes that were under 0, 75 and 150 mM salinity conditions treated with 0, 0.5, 1 and 1.5 mM SA and after two weeks, the factors such as Na+, K+, proline and MDA contents, leaf electrolyte leakage and enzymatic activities were measured. The results showed that all SA treatments were significantly effective at tolerance enhancement by reduction in Na+/K+ ratio, leaf electrolyte leakage, MDA and H2O2 values and promotion in proline content and the enzymatic activities (POD, APX, CAT and SOD) of grapes. These results indicated that SA application at salinity condition could be applied as a promising method for increasing the salinity tolerance of ‘Sultana’ grapes.

scholarly journals USING SALICYLIC ACID AND HUMIC ACID AS FOLIAR APPLICATION IN AMENDING THE HARMFUL INFLUENCE OF SOIL SALINITY STRESS IN COMMON SAGE (SALVIA OFFICINALIS L.)

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Heba A.A. A. Hegazy ◽  
A. E. Awad ◽  
M. A. I. Abdelkader
Keyword(s):  
Salicylic Acid ◽  
Humic Acid ◽  
Soil Salinity ◽  
Yield Components ◽  
Foliar Application ◽  
Resistance Index ◽  
Volatile Oil ◽  
Salt Resistance ◽  
Salinity Levels ◽  
Total Carbohydrates

In order to amend the harmful effect of soil salinity stress in common sage plants by foliar spray with salicylic acid (SA) and humic acid (HA), two pot experiments were conducted at the Nursery of ornamental plants, Agric. Fac., Zagazig Univ., Sharkia Governorate, Egypt in lath house during the two winter consecutive seasons of 2018/2019 and 2019/2020. The aiming of this work was to investigate the effect of foliar application treatments i.e., sprayed with distilled water (control), 200 ppm salicylic acid (SA), 750 ppm humic acid (HA), 1500 ppm HA, 200 ppm SA+750 ppm HA and 200 ppm SA+1500 ppm HA under various soil salinity levels (0.0, 1000 and 2000 ppm) as well as their combinations on yield components, salt resistance index and volatile oil production as well as some chemical constituents of Salvia officinalis plants. These experiments were arranged in a split-plot design with three replicates. The main plots were occupied by different soil salinity levels and the sub plots were entitled to different salicylic acid and humic acid acids concentrations. The obtained results referred to that herb fresh and dry weights per plant as yield components, volatile oil percentage and volatile oil yield per plant as volatile oil production as well as salt resistance index (%) were recorded. Also, total carbohydrates percentage and total chlorophyll (SPAD unit) in sage leaves was determined. Results showed that using soil salinity levels (1000 and 2000 ppm) significantly decreased yield components, volatile oil yield per plant, total carbohydrates percentage and total chlorophyll content compared to control. In contrast, increasing soil salinity levels gradually increased volatile oil percentage and proline content. In addition, the maximum values of the most of all above mentioned traits were achieved by treating sage plants with 200 ppm SA+1500 ppm HA. Generally, it could conclude that 200 ppm SA+750 or 1500 ppm HA, showed a uniform influence in qualifying of common sage y

scholarly journals EFFECT OF SALICYLIC AND HUMIC ACID ON VINCRISTINE AND N, P, K CONTENT IN MADAGASCAR PERIWINKLE LEAVES

2016 ◽  
Vol 47 (2) ◽  
Author(s):  
Jaddo & Rabee
Keyword(s):  
Salicylic Acid ◽  
Humic Acid ◽  
Catharanthus Roseus ◽  
Foliar Application ◽  
Block Design ◽  
Experimental Unit ◽  
Madagascar Periwinkle ◽  
Randomized Block Design ◽  
Two Factors ◽  
Four Levels

An Experiment carried out in Al-Yarmook Area in Baghdad for the growing season 2014 to study the effects of foliar application of Salicylic acid and Humic acid on Vincristine and NPK content in Catharanthus roseus. A factorial experiment was applied including two factors according to The Complete Randomized Block Design, the first factor included four levels of salicylic acid 0, 25, 50, and 100 mg.L-1 which were represented with S0, S1, S2, and S3 sequentially, the second factor included three levels of Humic acid 0, 0.75, and 1.5 ml.L-1 and were represented with O0, O1, and O2 sequentially to make up 12 factors in total that were distributed randomly upon three replicates and each experimental unit included 8 plants. The results were analyzed using Genestat and the differences were tested according to (LSD) with a level of probability 5% and the results were as follows: Vincristine levels increased in the leaves of Catharanthus roseus as a result of foliar application of Salicylic acid and Humic as well NPK levels in leaves. Vinblastine was not detected in all treatments. The interaction effect between 100 mg.L-1 Salicylic acid and 1.5 ml.L-1Humic acid had an exceeding effect for all the studied parameters. It may be concluded that Salicylic and Humic acid may be used to increase Vincristine alkaloid content in Periwinkle plants at the levels 100 ml.L-1 and 1.5 mg.L-1 subsequently.

scholarly journals Silicon fertigation and salicylic acid foliar spraying mitigate ammonium deficiency and toxicity in Eucalyptus spp. clonal seedlings

PLoS ONE ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. e0250436
Author(s):  
Jonas Pereira de Souza Junior ◽  
Renato de Mello Prado ◽  
Thaís chagas Barros de Morais ◽  
Joaquim José Frazão ◽  
Marcilene Machado dos Santos Sarah ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Photosystem Ii ◽  
Nutrient Solution ◽  
Mass Production ◽  
Foliar Application ◽  
Nitrogen Deficiency ◽  
Photosynthetic Apparatus ◽  
Eucalyptus Grandis ◽  
Dry Mass ◽  
High Concentrations

Nitrogen deficiency and toxicity, primarily in its ammonium form (NH4+), can suppress plant growth and development. The use of silicon (Si) or salicylic acid (SA) may be an alternative to minimize the harmful effects of nutrient imbalances caused by NH4+, thereby improving the photosynthetic efficiency of plants. The aim of the present study was to assess the action of fertigation-applied Si and SA foliar spraying in mitigating NH4+ toxicity and deficiency in eucalyptus clonal seedlings. Two experiments were performed with eucalyptus clonal seedlings (Eucalyptus urophylla x Eucalyptus grandis), in a greenhouse. Both were carried out using a 4x2 factorial design and four concentrations of NH4+ (5, 15, 30 and 60 mmol L-1), in the absence and presence of Si (2 mmol L-1), in experiment I; or with and without SA foliar application (10−2 mmol L-1), in experiment II, with six repetitions. Nitrogen content rose as a result of increasing N-NH4+ concentration in the nutrient solution, and Si supplied via the nutrient solution was efficient in increasing the Si content in eucalyptus seedlings. The rise in N-NH4+ concentration favored the maintenance of the photosynthetic apparatus, but high N-NH4+ concentration increased energy loss through fluorescence and decreased the efficiency of photosystem II. The addition of Si to the nutrient solution proved to be beneficial to the photosynthetic apparatus by decreasing F0 at 15 and 30 mmol L-1 of NH4+; and Fm at all NH4+ concentrations studied. In addition, the beneficial element also increases Fv/Fm at all NH4+ concentrations studied. SA foliar application was also efficient in reducing photosynthetic energy losses by decreasing F0 and Fm at all NH4+ concentrations studied. However, SA only increased the Fv/Fm at the high concentrations studied (30 and 60 mmol L-1 of NH4+). Nitrogen disorder by deficiency or N-NH4+ toxicity reduced shoot dry mass production. The addition of Si to the nutrient solution and SA foliar application increased shoot dry mass production at all N-NH4+ concentrations studied, and benefitted the photosynthetic apparatus by decreasing fluorescence and improving the quantum efficiency of photosystem II as well as dry mass production.

scholarly journals Improving Resistance of Foeniculum Vulgare to Water Deficit Stress by Natural Regulators

2021 ◽  
Vol 67 (1) ◽  
pp. 29-41
Author(s):  
Farshad Sorkhi ◽  
Ramin Rostami ◽  
Kazem Ghassemi-Golezani
Keyword(s):  
Salicylic Acid ◽  
Essential Oil ◽  
Water Deficit ◽  
Seed Yield ◽  
Foliar Application ◽  
Foliar Spray ◽  
Proline Content ◽  
Water Deficit Stress ◽  
Foeniculum Vulgare ◽  
Severe Water Deficit

Abstract This research was conducted as a combined analysis with four replications in two years (2018 ‒ 2019). Treatments were irrigation up to 90%, 50%, and 20% field capacity (as normal irrigation, moderate and severe water deficit stresses, respectively) and foliar application of natural regulators (untreated as control, salicylic acid, spermidine, and methanol). Increasing water deficit stress was led to a significant increase in essential oil percentage and proline content and a significant decrease in yield parameters and seed yield. Most of the traits (except the percentage of essential oil) were affected by natural growth regulators. The highest seed yield (1,127.59 kg/ha), plant biomass (5,426.92 kg/ha), essential oil yield (22.67 kg/ha), and proline content (29.34 μmol/g fresh weight) were obtained in methanol treated plants under normal irrigation. However, the highest amount of these traits under moderate and severe water deficit was recorded for salicylic acid-treated plants. Therefore, foliar spray of methanol was a useful treatment for non-stress conditions, but, application of salicylic acid was the superior treatment for reducing the negative effects of water deficit stress on Foeniculum vulgare.

scholarly journals Improvement in Growth, Yield, and Fruit Quality of Three Red Sweet Pepper Cultivars by Foliar Application of Humic and Salicylic Acids

2019 ◽  
Vol 29 (2) ◽  
pp. 170-178 ◽  
Author(s):  
Abdullah Ibrahim ◽  
Hesham Abdel-Razzak ◽  
Mahmoud Wahb-Allah ◽  
Mekhled Alenazi ◽  
Abdullah Alsadon ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Fruit Quality ◽  
Acid Treatment ◽  
Foliar Application ◽  
Growth Yield ◽  
Sweet Pepper ◽  
Fruit Yield ◽  
Yield And Quality ◽  
Salicylic Acids

The present study reports on the effect of humic and salicylic acids on the growth, yield, and fruit quality of three red sweet pepper (Capsicum annuum) cultivars: Barbero, Ferrari, and Imperio. The plants were grown in a greenhouse and the leaves were treated with humic or salicylic acids at 0, 0.5, 1.0, and 1.5 g·L−1 at 20, 40, and 60 days after transplanting. Foliar application of humic or salicylic acids significantly increased vegetative growth, fruit yield, and quality of the three cultivars as compared with the control plants. However, salicylic acid treatment proved more effective than humic acid treatment. Red sweet pepper plants of all three cultivars sprayed with 1.5 g·L−1 salicylic acid showed the greatest vegetative growth; fruit yield components, such as fruit number, diameter, and fresh and dry weights; and fruit quality traits, such as vitamin C content, total soluble solid content, titratable acidity, and total sugar content, than the plants in all other treatments. There were significant differences (P ≤ 0.05) among cultivars in response to humic and salicylic acid foliar application; ‘Ferrari’ showed significantly higher yield and productivity than ‘Barbero’ or ‘Imperio’. ‘Ferrari’ plants sprayed with 1.5 g·L−1 salicylic acid showed the highest fruit weight (202.41 g) and flesh thickness (68 mm), both of which are preferred by consumers, and therefore, have increased market value. This treatment also increased total yield by 27.7% (16.03 t·ha−1), 15.9% (12.38 t·ha−1), and 17.9% (11.88 t·ha−1) in ‘Barbero’, ‘Ferrari’, and ‘Imperio’, respectively. Therefore, salicylic acid foliar application is recommended for enhancing fruit yield and quality of greenhouse-grown red sweet pepper.

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