scholarly journals Effect of foliar application of nitrogen and plant growth regulators on bearing, physico-chemical constituents and shelf-life of mango (Mangifera indica L.)

2021 ◽  
pp. 71-76
Author(s):  
BIPUL KUMAR MANDAL
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Fruit Set ◽  
Foliar Application ◽  
Chemical Constituents ◽  
Mangifera Indica ◽  
Block Design ◽  
Favourable Effect ◽  
Physico Chemical

The experiment was carried out on ten-year-old Amarapali mango (Mangifera indica L) in randomized block design with seventeen treatments with three replications at BAU, Ranchi to study the effect of foliar application of nitrogen and plant growth regulators on bearing and physico-chemical constituent and self life of mango. Among the different treatments, application of 200ppm ethephon had most favourable effect in causing earliness in panicle emergence days (16.0 days), initiation of first flower (12.3 days) and days to initiation of fruit set (10.3 days) over control. Whereas application of 2000ppm triadimefon in combination with 2% urea increased intensity of flowering shoot to the extent of88.5% in fruit plant. The maximum number of fruit set per panicle (44.7), fruit retention (12.1%) and number of harvested fruit per tree (194.4) were observed with combined use of 100ppm SA and 2% urea as compared to control. The highest TSS (25.1 0Brix) and reducing sugar (3.0%) content were registered under 100ppm GA3, while the highest phenol (2.84mg/100g) was recorded from the fruits of the plants sprayed with 200ppm ethephon in combination with 2% urea. However, minimum (11.1%) physiological loss in weight (PLW) was recorded in 100ppm SA along with 2% urea.

scholarly journals 300 Effects of Plant Growth Regulators on Eggplant (Solanum melongena L.) Yield

HortScience ◽  
2000 ◽  
Vol 35 (3) ◽  
pp. 443C-443
Author(s):  
J. Pablo Morales-Payan
Keyword(s):  
Plant Growth ◽  
Gibberellic Acid ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Fruit Set ◽  
Block Design ◽  
Control Treatment ◽  
Amine Hydrochloride ◽  
Yield Increase ◽  
Giberellic Acid

Field studies were conducted in the Dominican Republic to determine the effect of several plant growth regulators on the yield of `Jira' eggplant. Treatments consisted of aqueous solutions of folcysteine (25, 50, 75 ppm), giberellic acid 3 (10, 20, 30 ppm), kinetine (25, 50, 75 ppm), naphthalenacetic acid (NAA) (25, 50, 75 ppm), 2,3,4-dichloro-phenoxy-triethyl-amine hydrochloride (DCPTA) (25, 50, 75 ppm), triacontanol (5, 10, 15 ppm), ethanol (5, 10, 15%), and chlormequat (50, 100, 150 ppm) sprayed at early flowering, directed to the crop upper leaves and flowers. A control treatment (no plant growth regulators applied) was also included. A randomized complete-block design with four replications was utilized. Experimental units were two rows of 10 plants at a 1.0 × 0.4-m distancing. Eggplant fruit set and yield were determined after 10 harvests performed at 3-day intervals. Analysis of variance and mean comparison tests were performed on the resulting data. `Jira' eggplant fruit set and yield was significantly improved by folcysteine, giberellic acid 3, and NAA, but not by kinetine, DCPTA, ethanol, triacontanol, or chlormequat. Eggplant yield increased as folcysteine rate increased from 0 to 50 ppm, but no further yield increase was obtained when increasing the rate from 50 to 75 ppm. Similarly, eggplant yield significantly increased as gibberellic acid increased from 0 to 20 ppm, but not when rates increased from 20 to 30 ppm. With NAA, eggplant fruit set and yield significantly increased above that of control plants when 25 ppm was applied, with no significant yield increase at higher rates. Results indicate that the yield of `Jira' eggplants could be enhanced by the treatments with either folcysteine, NAA, or gibberellic acid hereby described.

scholarly journals Plant Growth Regulators Modify Fruit Set, Fruit Quality, and Return Bloom in Sweet Cherry

HortScience ◽  
2021 ◽  
pp. 1-10
Author(s):  
Irfan Ali Sabir ◽  
Xunju Liu ◽  
Songtao Jiu ◽  
Matthew Whiting ◽  
Caixi Zhang
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Fruit Quality ◽  
Sweet Cherry ◽  
Prunus Avium ◽  
Fruit Set ◽  
Foliar Application ◽  
Negative Effects ◽  
Return Bloom

Sweet cherry (Prunus avium L.) is a valuable fruit crop worldwide. Farmers’ incomes are closely related to fruit quantity and quality, yet these can be highly variable across years. As part of a broader project for optimizing fruit set and fruit quality in sweet cherries, this study was conducted to evaluate the potential of various plant growth regulators (PGRs) for improving fruit set and fruit quality. Cytokinins, gibberellins, auxin, and polyamines were used as treatments. Treatments were applied as foliar sprays at full bloom to ‘Bing’ and three low-productivity genotypes, ‘Regina’, ‘Tieton’, and ‘PC8011-3’. We assessed the fruit set, fruit quality, and return bloom from each treatment. 4-chlorophenoxyacetic acid (4-CPA) increased fruit set by 53% and 36% in ‘Bing’ and ‘Tieton’, respectively. The combination of gibberellin (GA)3 + GA4/7 was more effective for improving fruit set than other isomers of gibberellin alone. Cytokinin treatments had slight adverse effects or no effect on fruit set except for CPPU. In ‘PC8011-3’, both N-(2-chloro-4-pyridyl)-N'-phenylurea (CPPU) and 4-CPA enhanced fruit set by ≈81% and 100% compared with untreated control. The response of cherry trees to polyamine sprays depended on the properties of the cultivars and the treatment concentration. Foliar application of GA3, GA4/7, or N-phenyl-N'-(1, 2, 3-thiadiazol-5-yl) urea (TDZ) in ‘Bing’ trees has negative effects on return bloom, whereas GA1 can increase the yield and flower buds. These results suggest that PGRs may have varied effects on sweet cherry fruit set and that more work is needed to develop practical programs for improving yield security.

scholarly journals Effect of plant growth regulators and organic manure on some morphological characters, biomass and essential oil yield of dragonhead (Dracocephalum moldavica) / Augalų augimo reguliatorių ir organinių trąšų poveikis darželinės žiomenės (Dracocephalum moldavica) morfologiniams požymiams, biomasei ir eterinio aliejaus išeigai

2016 ◽  
Vol 22 (2) ◽  
pp. 123-132 ◽  
Author(s):  
Yousef Nasiri
Keyword(s):  
Essential Oil ◽  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Foliar Application ◽  
Block Design ◽  
Farmyard Manure ◽  
Morphological Characters ◽  
Oil Yield ◽  
Essential Oil Yield

AbstractTo study the effect of farmyard manure and plant growth regulators on yield and essential oils of dragonhead, an outdoor experiment was conducted in Maragheh, Iran. The experiment was carried out based on randomized complete block design with three replications. Three amounts of farmyard manure (FYM) including 0, 10 and 20 t/ha together with foliar growth regulators including 0, salicylic acid (SA), ascorbic acid (ASc) and SA + ASc were used. The results revealed that application of 10 and 20 t/ha farmyard manure significantly increased plant height and the number of lateral stems. However, application of 20 t/ha led to the increase of the number of the main and flowering stems, biomass and essential oil percentage of dragonhead compared to control. The effect of growth regulators on the number of lateral and flowering stems, and biomass was significant: foliar application of SA and ASc separately or in combination increased the number of lateral stems; however, the number of flowering stems and biomass of dragonhead increased only when both growth regulators were used in combination (SA + ASc). The results also indicated that the highest length of inflorescence (13.57 cm) and essential oil yield (41.83 kg/ha), by 31.4 and 126.3% increment, respectively, were observed under foliar application of 20 t/ha farmyard manure together with SA + ASc application compared to the control.

scholarly journals EFFECTS OF PLANT GROWTH REGULATORS AND DATES PLANTING ON SPRING MAIZE PRODUCTION UNDER AGRO-CLIMATIC CONDITIONS OF FAISALABAD, PAKISTAN

2021 ◽  
Vol 36 (2) ◽  
pp. 120-128
Author(s):  
M. Qandeel ◽  
A. Jabbar ◽  
F. U. Haider ◽  
A. L. Virk ◽  
N. U. Ain
Keyword(s):  
Heat Stress ◽  
Plant Growth ◽  
Grain Yield ◽  
Methyl Jasmonate ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Foliar Application ◽  
Block Design ◽  
Maximum Yield ◽  
Spring Maize

Maize is a widely grown cereal crop worldwide, butthe heat stress and delayed sowing of maize are major constraints that result in declining the maize productivity.Therefore, the current study was designed to investigate the growth promoting effect of different growth regulators i.e., salicylic acid, methyl jasmonate, and humic acid at multiple sowing times in  spring maize. Experiment was laid out in randomized complete block design having split-plot arrangement with three replications having plot size of 6m × 2.25m.The yield contributing agronomic parameters were recorded and analyzed statistically by using Fisher’s analysis of variance technique and treatment means were contrasted by Least significance difference having 5% probability test. Results revealed that early and delayed sowing of maize tended to decline the maize productivity and grain yield. Maximum yield and yield contributing traits were observed in S1 (recommended sowing, i.e., 20-02-2017). The plant growth regulators significantly influenced the productivity of maize and minimized heat stress. The interaction between sowing dates and plant growth regulators were also significant. Among plant growth regulators, the foliar application of methyl jasmonate resulted to produce maximum biological, grain yield, 1000-grain weight, and harvest index, which were 23.04, 36.12, 14.06 and 7.87%, respectively higher than the control.The study reported that delayed sowing of maize declined the production of maize due to the gradual rise of temperature in March and plant growth regulators had the potential to minimize the heat stress and productivity of maize.

scholarly journals RESPONSE OF PLANT GROWTH REGULATORS ON THE GROWTH, FLOWERING AND YIELD ATTRIBUTES OF AFRICAN MARIGOLD (TAGETES ERECTA. L)

2021 ◽  
Vol 21 (no 1) ◽  
Author(s):  
Kousika. S ◽  
Ajish Muraleedharan ◽  
K. Sha ◽  
P.K. karthikeyan ◽  
C. Praveen Sampath Kumar ◽  
...  
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Foliar Application ◽  
Block Design ◽  
Tagetes Erecta ◽  
Herbaceous Plant ◽  
Flower Bud ◽  
Yield Attributes ◽  
African Marigold

Tagetes is a genus of annual, perennial or herbaceous plant in the family Asteraceae. Most of the species have pinnate green leaves. Blooms are naturally occurring in golden, orangeyellow, and white colour, often with maroon highlights. Floral heads are 4 to 6 cm in diameter, generally with both ray florets and disc florets. The present study was conducted at the post graduate research laboratory at Department of Horticulture, Faculty of Agriculture, Annamalai University to find out the “Effect of plant growth regulators on flowering and yield of African marigold (Tagetes erecta Linn)”. The experiment was laid out in Randomized Block Design with three replications. There were ten treatments, viz., GA3 100 ppm, GA3 200 ppm and GA3 300 ppm, NAA 100 ppm, NAA 200 ppm, NAA 300 ppm, Ethrel 50 ppm, Ethrel 100 ppm, and Ethrel 150 ppm and control. Among the growth regulators tried, GA3 200 ppm as foliar application on 30 and 60 days after transplanting registered the highest values for plant characters like plant height (47.1 cm), number of branches ( 35.1), days taken to first flower bud appearance (39.3 days), days taken to flower opening (37.6 days), longevity of flower (11.17 days), stalk length (12.1 cm), diameter of flower (7.8 cm), number of flowers per plant (40.3), weight of the single flower (9.1 g), yield of flowers per plant (337 g) and flower yield per plot (11.1 kg). From the present study, it is recommended that spraying of GA3 200 ppm on 30 and 60 days after transplanting improved yield and quality of African marigold flowers.

scholarly journals Changes in essential oil content of Lippia citriodora in response to induction of bio-active compounds and plant growth regulators

2017 ◽  
Vol 7 (4) ◽  
pp. 619-626 ◽  
Author(s):  
Mahsa Roodbaraky ◽  
Ali Mehrafarin ◽  
Farahnaz Khalighi-Sigaroodi ◽  
Hassanali Naghdi Badi
Keyword(s):  
Essential Oil ◽  
Plant Growth ◽  
Plant Growth Regulators ◽  
Bioactive Compounds ◽  
Growth Regulators ◽  
Oil Content ◽  
Foliar Application ◽  
Block Design ◽  
Distilled Water ◽  
Lippia Citriodora

<p>Background &amp; aim: Bioactive compounds and plant growth regulators could change a plant’s essential oil content and composition. In this study, the effect of bioactive compounds and plant growth regulators on lippia citriodora was investigated.<br />Objective: This experiment was done with three replications on the basis of factorial experiment in randomized complete block design. The bio-regulators were sprayed in four levels, i.e. distilled water, 50 ppm gibberellic acid (GA3) + 50 ppm indole-3-butyric acid (IBA), 50 ppm GA3 + 100 ppm IBA, and 100 ppm GA3 + 50 ppm IBA. The chitosan was sprayed in two levels: distilled water and 400 ppm chitosan. The methanol was sprayed in two levels: distilled water and 5% v/v methanol. The essential oil was extracted by hydrodistillation method and analyzed by GC and GC/MS.<br />Results: Thirty-two compounds were identified, representing 95.08% of the total essential oil. The main components were E-citral (geranial) (25.02%), Z-citral (neral) (16.04%), ar-curcumene (10.37%), caryophyllene oxide (9.56%), spathulenol (6.83%), limonene (4.99%) and (E)-caryophyllene (2.29%). The studied traits were significantly affected (p &lt; 0.01) by the interaction of bioregulators, methanol and chitosan application.<br />Conclusion: Foliar application of IBA, GA3, chitosan and methanol could increase aromatic values of L. citriodora essential oil.</p>

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