scholarly journals Inducing resistance of cucumber plants to diseases by using plant growth regulators

2019 ◽  
pp. 10-14
Author(s):  
O. Onyshchenko ◽  
O. Chaiuk
Keyword(s):  
Salicylic Acid ◽  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Plant Resistance ◽  
Root Rot ◽  
Biologically Active ◽  
Biological Efficiency ◽  
Noticeable Effect ◽  
Resistance Inducers

Goal. To investigate the influence of plant growth regulators (PGR) and microfertilizer as plant resistance inducers for reducing the development of cucumber diseases in film greenhouses. Methods. Field and laboratory. Results. Analysis of the activity of total peroxidase showed a positive dynamics of activation of this enzyme - an increase of 1,2 – 2,2 times, which is 14,3 – 54,6%. It was the highest in the version with the use of Epin extra and salicylic acid. For the third day after plant treatment, the enzyme activity increased to 74.7-75.1 mg-ekv/g·s, Due to increased plant resistance, a decrease in the level of infestation of cucumber plants is noted. Depending on the drugs, the intensity of development of root rot in the average years of research was kept within 12.3-17.7 % at 30.5 % in the control. The smallest development of root rot was observed after application of microfertilizer CompleMet – 12.3 %. Treatment of plants by growth regulators led to a decrease in the level of damage of cucumber by downy mildew. The smallest development of the disease was noted in variants with Vimpel Maxi, Epin extra and CompleMet – 8.5% at 13.7% in control. Conclusions. The tendency to increase the level of activity of peroxidase in cucumber plants after treatment with plant growth regulators is revealed, which indicates an increase in the activity of one of the key non-specific protective reactions and, consequently, unspecific plant resistance. The effectiveness of PGR on the basis of humic acids, biologically active substances and microfertilizer CompleMet as an inducer of plant resistance to diseases has been established. The most effective against root rot is microfertilizer CompleMet – 60 % among growth regulators: Vimpel Maxi, salicylic acid, Epin extra (biological efficiency – 56, 55, 52 % respectively). Influence from the action of PGR against downy mildewis observed at the initial stages of disease development. A noticeable effect is observed when applying Epin extra, Vimpel Maxi and CompleMet (biological efficiency – 38%).

scholarly journals Improvement of the chilling tolerance of ‘Monika’ cucumber seedlings by short-term temperature and seed conditioning with plant growth regulators

2014 ◽  
Vol 26 (2) ◽  
pp. 109-115
Author(s):  
Krzysztof Górnik
Keyword(s):  
Salicylic Acid ◽  
Plant Growth ◽  
Jasmonic Acid ◽  
Dehydrogenase Activity ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Chilling Tolerance ◽  
Short Term ◽  
Cucumber Seedlings ◽  
Seed Conditioning

ABSTRACT The aim of the present study was to improve the chilling tolerance of cucumber seedlings. The conditioned seeds in solutions of salicylic or jasmonic acid in concentrations of 10-2, 10-3 or 10-4 M or brassinolide in concentrations of 10-6, 10-8 or 10-10 M were subjected to temperature shock of 0, 2.5, 5, 35, 40 or 45°C for 1, 2 or 4 hours. Seedlings with 3 mm roots were chilled at 0°C for three days. The chilling susceptibility was evaluated by measurements of roots lengths, electrolyte leakage and total dehydrogenase activity. The obtained results indicated that cucumber tolerance to chilling conditions depended on the plant growth regulators used during seed imbibition and its concentration as well as the temperature initiating thermal shock and its duration. The highest tolerance to chilling, expressed by the subsequent growth of roots, was observed after seed conditioning in salicylic acid solutions in a concentration of 10-4 M for 16 h at 25°C, then exposed for 4 h to a shock temperature of 5°C. The length of seedling roots after such treatment was over 12 times longer than the control (imbibed in distilled water and not subjected to short-term temperature impact). An increased chilling tolerance of cucumber seedlings may result from enhanced membrane integrity and total dehydrogenase activity. Further research is needed to explain the mechanism of the positive effects of salicylic acid, jasmonic acid or brassinolide application to reduce the injurious effects of chilling on cucumber seedlings.

scholarly journals Influence of Plant Growth Regulators and Micronutrients on Growth, Yield and Quality of Sorghum under Temperate Conditions

2021 ◽  
pp. 18-23
Author(s):  
Zahida Rashid ◽  
Tanveer Ahmad Ahngar ◽  
B. Sabiya ◽  
N. Sabina ◽  
N. S. Khuroo ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Foliar Spray ◽  
Growth Yield ◽  
Soil Application ◽  
Yield And Quality ◽  
Green Fodder ◽  
Fodder Yield

A field experiment was conducted at Dry land Agricultural Research Station, Rangreth, Srinagar, SKUAST-K in Kharif 2020 to study the effect of Plant Growth Regulators and micronutrients on growth, yield and quality of sorghum. The objective of the study was to assess the effect of Plant Growth Regulators and micronutrients on herbage yield and quality. The treatments included; T1: Tricontanol 10 ppm at 30 DAS (foliar spray), T2: Salicylic acid 100 ppm at 30 DAS (foliar spray), T3: 5 kg Zn/ha soil application, T4: 2 kg B/ha soil application, T5: 5 kg Zn + 2 kg B/ha soil application, T6: 5 kg Zn/ha (soil application ) + Triacontanol 10 ppm at 30 DAS (foliar spray), T7: 5 kg Zn/ha (soil application) + salicylic acid 100 ppm at 30 DAS (foliar spray), T8: 2 kg B/ha (soil application) + Triacontanol 10 ppm at 30 DAS (foliar spray), T9: 2 kg B/ha (soil application )+ salicylic acid 100 ppm at 30 DAS (foliar spray), T10: 5 kg Zn + 2 kg B/ha (soil application) + Triacontanol 10 ppm at 30 DAS (foliar spray), T11: 5 kg Zn + 2 kg B/ha (soil application) + salicylic acid 100 ppm at 30 DAS (foliar spray) and T12: Water spray at the time of PGR application. Zn and B were applied at the time of sowing in the soil. The crop was raised with recommended package of practices. In treatments, where zinc was not a treatment, an amount of sulphur through gypsum equivalent to sulphate supplied with 5 kg ZnSO4 was applied to compensate. The crop was sown in 30.0 cm apart lines. The trial was laid out in Randomized Block Design with three replications. The results indicated that all the treatments improved the green fodder yield over control. Among different treatments, T10: 5 kg Zn + 2 kg B/ha soil application + Triacontanol 10 ppm at 30 DAS foliar spray and T11: 5 kg Zn + 2 kg B/ha soil application + salicylic acid 100 ppm at 30 DAS foliar spray produced maximum GFY (493.6 and 490.5q/ha) on locational mean basis. It was significantly superior to other treatments. These treatments improved the green fodder yields by 35.0 % and 34.2 %, respectively, over control (spray of water). In terms of dry matter, similar trend was noted and the improvement with T10 and T11 was to the tune of 36.8 % and 41.0 % over control. Tricontanol 10 ppm at 30 DAS (foliar spray) (T1) improved the green fodder yield and dry fodder yield by 13.6% and 14.3 % respectively over T12Water spray at the time of Plant Growth Regulator application. Similarly spray of T2: Salicylic acid 100 ppm at 30 DAS (foliar spray) improved the green fodder yield and dry fodder yield by 14.4% and 15.4% respectively over T12Water spray at the time of Plant Growth Regulator application. Similar trend was observed with respect to quality parameters (crude protein content and crude protein yield) of sorghum.

ACTUAL QUESTIONS OF BIOLOGICAL EFFICIENCY, HYGIENE AND TOXICOLOGY IN MODERN TECHNOLOGIES OF AGROCHEMICALS

2018 ◽  
pp. 39-44
Author(s):  
V. G. Sychyov ◽  
O. A. Shapoval ◽  
O. V. Vetrova ◽  
I. P. Mozharova ◽  
A. V. Istomin
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Plant Protection ◽  
Biological Efficiency ◽  
Agricultural Technologies ◽  
10Th Anniversary ◽  
Wide Range ◽  
Scientific Practical ◽  
State Registration

The article is devoted to the results of the 10th anniversary scientific-practical conference «Anapa-2018» «Prospects for the use of innovative forms of fertilizers, plant protection and plant growth regulators in agricultural technologies» with the participation of leading experts and managers in the field of agrochemical production, specialized agencies, the Russian Academy Sciences, Rospotrebnadzor, and the RF Ministry of Agriculture. The conference discussed a wide range of topical issues on the use of new innovative forms of fertilizers, protection products, plant growth regulators and the technology of their use in agricultural production; issues of state registration, certification and declaration of pesticides and agrochemicals.

scholarly journals Response of linseed (Linum usitatissimum L.) to different plant growth regulators

2021 ◽  
Vol 17 (2) ◽  
pp. 276-279
Author(s):  
J.R. Katore ◽  
Beena Nair ◽  
Rupali Damdar ◽  
Shilpa Rananaware ◽  
G.R. Kavalkar
Keyword(s):  
Salicylic Acid ◽  
Plant Growth ◽  
Plant Growth Regulators ◽  
Seed Yield ◽  
Growth Regulators ◽  
Linum Usitatissimum ◽  
Growth Yield ◽  
Yield Attributes ◽  
Linum Usitatissimum L ◽  
Monetary Return

The commercial importance of linseed (Linum usitatissimum L.) has attracted Agronomist to increase its seed yield using various agronomical and breeding approaches. Plant growth regulators (PGRs) have a significant role in enhancing yield and its related traits in linseed. Hence, to find out effect of different growth regulators on growth, yield attributes, yield and economics of linseed, the present experiment was conducted under AICRP on Linseed, College of Agriculture, Nagpur. Growth regulator shows significant effect on growth, yield attributes and yield of linseed. Plant height and number of capsules per plant was observed highest and significantly superior after application of 400 ppm Gibberellic acid (GA) and application of 0.1 % Tebuconazole which was at par with T7 i.e. 1.0 ppm Auxin + 200 ppm GA and T5 i.e. 75 ppm salicylic acid. Number of branches and number of capsules per plant were also observed at par in the treatment T3 i.e. 200 ppm GA. The seed yield of linseed was recorded significantly higher in T4 i.e. 400 ppm GA which was at par with T7 i.e. 1.0 ppm Auxin + 200 ppm GA and treatment T3 i.e. 200 ppm GA and treatment T5 i.e. 75 ppm salicylic acid. The gross monetary return was found maximum in the treatment T4 i.e. 400 ppm GA, this might be due the maximum seed yield after application of 400 ppm GA, but net monetary return and B:C ratio resulted minimum due to the high market cost of GA (Rs. 9000/- for 400 ppm). Net monetary return and B:C ratio was found maximum in treatment T5 i.e. 75 ppm salicylic acid, this might be due to the low cost of Salicylic acid.

scholarly journals Regulation of physiological processes in winter wheat by growth regulators in conditions of powdery mildew infection

2019 ◽  
Vol 10 (3) ◽  
pp. 331-336
Author(s):  
Т. P. Mamenko ◽  
R. A. Yakymchuk
Keyword(s):  
Salicylic Acid ◽  
Antioxidant Enzymes ◽  
Powdery Mildew ◽  
Plant Growth ◽  
Winter Wheat ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Wheat Varieties ◽  
Physiological Processes ◽  
Winter Wheat Varieties

An important way of regulating the key units of metabolism in the plant organism under the action of stressors is the use of biologically active substances with regulating properties – plant growth regulators. They affect endogenous regulatory systems, altering key metabolic pathways and thus increasing the plant's sustainability and productive potential in adverse environmental conditions. The aim of the research was to establish the possibility of regulation of physiological processes in winter wheat varieties by exogenous treatment of plants with growth regulators of synthetic (salicylic acid) and natural (Emistim C and Biolan) origin to increase their resistance to the phytopathogen Erysiphe graminis DC f. sp. tritici Em. Marchal , the causative agent of powdery mildew. The intensity of the physiological processes in plants was evaluated by the dynamics of the activity of antioxidant enzymes – ascorbate peroxidase and catalase, the release of ethylene and the integrity of the cell membranes. The objects were selected varieties of soft winter wheat, which were grown in controlled growing conditions against the background of infection by powdery mildew. The treatment of plants was carried out using aqueous salicylic acid solutions in the concentration of 10–5 M (experimentally established by us), Emistim C and Biolan (manufacturer Agrobiotech) in the concentration specified by the manufacturer at the rate of 20 mL/ha, when the development of the disease reached 5% of the total natural background of the infection in the plants during the stages of heading-beginning of flowering. Infection of winter wheat with powdery mildew leads to disruption of cell membrane integrity, increased activity of catalase and ascorbate peroxidase in leaves of the susceptible winter wheat variety. The intensification of ethylene release by leaves of the resistant variety was observed, which was caused by the hypersensitive reaction of the hormone to the effect of stress. The use of plant treatment by growth regulators contributes to maintaining the integrity of membrane structures, adaptive changes in the activity of antioxidant enzymes and regulation of the synthesis of the stress hormone ethylene in both winter wheat varieties under stress. Such changes in the physiological processes induced by plant growth regulators are accompanied by the preservation of the grain productivity of winter wheat and the increase of their resistance to the development of the disease.

scholarly journals Influence of plant growth regulators and salicylic acid on the production of some secondary metabolites in callus and cell suspension culture of Satureja sahendica Bornm.

2021 ◽  
Vol 117 (4) ◽  
pp. 1
Author(s):  
Sarieh TARIGHOLIZADEH ◽  
Rouhollah MOTAFAKKERAZAD ◽  
Morteza KOSARI-NASAB ◽  
Ali MOVAFEGHI ◽  
Sakineh MOHAMMADI ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Secondary Metabolites ◽  
Plant Growth ◽  
Suspension Culture ◽  
Cell Suspension ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Cell Suspension Culture ◽  
Total Phenolics ◽  
Fresh Mass

<p class="042abstractstekst">The impact of combinations of plant growth regulators (PGRs) on callus culture of <em>Satureja sahendica </em>Bornm. was investigated. In nodal explants, the response of secondary metabolite production to different concentrations of PGRs was analyzed regarding the presence and absence of polyvinylpyrrolidone (PVP). The explants were cultured on MS media in presence of auxins (2,4-dichlorophenoxyacetic acid and naphthylacetic acid) and cytokinins (thidiazuron and kinetin); which were used in equal concentrations of 0.5, 1, and 2 mg l<sup>-1</sup>. The treatment of 2 mg l<sup>-1</sup> 2,4-D + 2 mg l<sup>-1 </sup>Kin (MD3) led to the highest production of total phenolics (4.303 ± 0.449 mg GAE g<sup>-1</sup>) and flavonoids (24.903 ± 7.016 mg QE g<sup>-1</sup>). Moreover, the effect of salicylic acid (SA) on the production of secondary metabolites in cell suspension culture of <em>Satureja sahendica</em> was evaluated. The cell suspension culture was established by culturing the nodal-derived friable callus in the liquid medium containing different concentrations of SA (0, 100, 150, 200 µM). An inverse relationship exists between the fresh mass and secondary metabolites contents. In addition, there was a significant difference among concentrations of SA in the production of total phenolics and flavonoid compounds. SA enhances secondary metabolites production and decreases cell fresh mass.</p>

PGRs and nutrient consortium effect on water relations, photosynthesis, catalase enzyme and yield of blackgram under salinity stress

2019 ◽  
Author(s):  
R. Sivakumar and S. Jaya Priya
Keyword(s):  
Ascorbic Acid ◽  
Salicylic Acid ◽  
Plant Growth ◽  
Jasmonic Acid ◽  
Water Potential ◽  
Plant Growth Regulators ◽  
Salinity Stress ◽  
Growth Regulators ◽  
Chlorophyll Index ◽  
Benzyl Amino Purine

An experiment was conducted to study the effect of plant growth regulators namely jasmonic acid (50 µM), brassinolide (0.5 ppm), salicylic acid (100 ppm), ascorbic acid (100 ppm), gibberellic acid (10 ppm), benzyl amino purine (5 ppm) and nutrient consortium (K2SO4 (0.5%) + FeSO4 (0.5%) + Borax (0.3%) and TNAU Pulse Wonder (1%) on blackgram (Vigna mungo L.) variety TNAU (Blackgram) CO 6 under salinity condition. The salinity was imposed by 125 mM NaCl concentration in pot culture. Plant growth regulators and nutrient consortium were used as foliar spray at 20 and 40 days after sowing except jasmonic acid, which used as seed soaking. Under salinity stress, water potential, relative water content (RWC), photosynthetic rate, chlorophyll index and yield were significantly reduced as compared to control. Among the treatments, brassinolide and TNAU Pulse Wonder showed supremacy to enhance water potential, RWC and yield compared to other treatments. Salicylic acid performed better to stabilize the photosynthetic rate under salinity followed by TNAU Pulse Wonder. Benzyl amino purine had higher chlorophyll index than other treatments. Increased catalase activity was observed in brassinolide treated plants followed by salicylic acid and ascorbic acid under salinity.

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