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.

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.

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 Effect of Plant Growth Regulators on Fruit-set and Quality of Guava

2016 ◽  
Vol 4 (12) ◽  
pp. 1088 ◽  
Author(s):  
Shreef Mahmood ◽  
Md. Nazmul Hasan ◽  
S.M. Younus Ali ◽  
Rafija Alam Ripa ◽  
Md. Golap Hossain
Keyword(s):  
Ascorbic Acid ◽  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Acid Content ◽  
Fruit Set ◽  
Ascorbic Acid Content ◽  
Fruit Weight ◽  
Control Treatment ◽  
Parthenocarpic Fruit

Two plant growth regulators: β-NOA (50 and 80 ppm) and GA (200 and 250 ppm) were applied to emasculated flowers at anthesis to set parthenocarpic fruit, while in the control treatment fruit set was achieved by natural pollination. The application of β-NOA found ineffective in setting parthenocarpic guava. No significant differences were observed in the length and diameter of fruit between parthenocarpic and naturally pollinated seeded fruit at different days after anthesis. The mean fruit weight, TSS and ascorbic acid content of parthenocarpic fruit were similar to that of seeded fruit. Significant higher amount of total polyphenol was detected in the seeded fruit than the parthenocarpic fruit. Although 200 ppm GA showed comparatively better response to fruit growth, TSS and ascorbic acid content than 250 ppm GA but not in a statistical level.

Simultaneous detection of plant growth regulators jasmonic acid and methyl jasmonate in plant samples by a monoclonal antibody-based ELISA

The Analyst ◽  
2020 ◽  
Vol 145 (11) ◽  
pp. 4004-4011
Author(s):  
Minghui Yi ◽  
Linchuan Zhao ◽  
Kang Wu ◽  
Chang Liu ◽  
Diandian Deng ◽  
...  
Keyword(s):  
Plant Growth ◽  
Jasmonic Acid ◽  
Methyl Jasmonate ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Higher Plants ◽  
Free Acid ◽  
Simultaneous Detection ◽  
Acid Form ◽  
Free Acid Form

Methyl jasmonate (MeJA) and its free-acid form, jasmonic acid (JA), collectively referred to as jasmonates (JAs), are natural plant growth regulators that are widely present in higher plants.

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 Effect of salicylic acid and progesterone on physiological characteristics of Kentucky bluegrass under salinity stress

2021 ◽  
Vol 38 (1) ◽  
pp. 111-124
Author(s):  
Elham Sabzmeydani ◽  
Shahram Sedaghathoor ◽  
Davood Hashemabadi
Keyword(s):  
Salicylic Acid ◽  
Plant Growth ◽  
Salinity Stress ◽  
Growth Regulators ◽  
Total Protein ◽  
Poa Pratensis ◽  
Kentucky Bluegrass ◽  
Carotenoid Content ◽  
Grass Growth ◽  
The Impact

Salinity is one of the most important limiting factors in plant growth. It is also a predominant constraint that impairs grass growth and quality. Plant hormones play important roles in the capability of plants to adapt to environmental stresses. Hence, the impact of two plant growth regulators (PGRs) i.e. salicylic acid (SA) and progesterone (P4) was studied on biological characteristics of Poa pratensis in saline conditions in a greenhouse experimnt. The experimental treatments were composed of salinity at four levels (0, 2, 4, and 6 dS m-1) and six levels of PGRs (control, 1 mg L-1 P4,10 mg L-1 P4, 1 mM SA, 3 mM SA, and 1 mg L-1 P4 + 1 mM SA). The results showed that leaf firing percentage was increased with the excess in salinity, but the use of SA and P4 eased the effects of salinity stress and reduced leaf firing under salinity. 6 dS m-1 and 3 mM SA salinity caused to the maximum electrolyte leakage. The highest relative water content was observed in 4 dS m-1 salinity and 1 mM SA treatment. The highest glycine betaine was related to 6 dS m-1 NaCl and no hormone application. Salinity increased total protein and catalase, and the simultaneous use of P4 and SA exhibited the highest total protein and catalase content, whilst the control plants showed the lowest ones. The application of salinity stress reduced chlorophyll content, but SA and P4 increased it. The application of the two growth regulators improved carotenoid content under salinity stress. Overall, the results showed that the application of SA and P4 improved salinity tolerance and increased pigments and antioxidant enzyme activities.

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