Efficacy of plant growth regulator (GA3) on growth and yield attributes of cauliflower (Brassica oleracea var. botrytis L.) at Dehradun valley

Abstract The Guinea savannah zone of Nigeria is beset by increasing population and infrastructural development, thereby putting pressure on available land with rapidly declining fertility due to low organic matter content, soil erosion, high temperature and seasonal bush burning. Sesame is cultivated in this zone and the yield has remained very low, compared to yield in other parts of the world. This could be attributed to poor nutrient status and poor cultural practices used by peasant farmers. A field experiment was conducted at the Teaching and Research Farm, University of Ilorin, Nigeria, in a southern Guinea savannah zone in 2015 and repeated in 2016 cropping season to determine the effects of 2,4-Dichlorophenoxyacetic acid (2,4-D), a plant growth regulator and NPK fertilizer on the growth and yield of sesame. The experiment was laid out as a factorial arrangement, fitted into a randomized complete block design replicated thrice. The factors imposed were 2,4-D (0, 5 and 10 ppm ha−1) and NPK 15:15:15 (0, 100, 200 and 300 kg ha−1). Data were collected on vegetative traits (plant height, number of leaves, leaf area) and yield components (number of capsules per plant; yield per plant and per hectare). The data were subjected to analysis of variance (ANOVA) using the Genstat statistical package 17th edition and significant means were separated by using the least significant difference at 5% level of probability. The result revealed that using plant growth regulator and NPK fertilizer had significant effects (p<0.05) on plant height (151 cm) and yield per hectare (530 kg/ha). The qualitative and quantitative analysis of the seeds further reaffirmed the presence of bioactive compounds, such as saponins, tannins, flavonoids and phenolic compounds, which are important health promoting food in the seeds.

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APPLICATION OF NATURAL PLANT GROWTH REGULATOR AND COW BIOURINE ON GROWTH AND YIELD OF SHALLOT IN RAINY SEASON (Allium cepa L.)

Agrivet ◽

10.31315/agrivet.v27i1.4692 ◽

2021 ◽

Vol 27 (1) ◽

pp. 29

Author(s):

Supono Budi Sutoto ◽

Ami Suryawati ◽

Lagiman Lagiman

Keyword(s):

Plant Growth ◽

Allium Cepa ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Rainy Season ◽

Growth And Yield ◽

Natural Plant ◽

Allium Cepa L

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Ornamental Cabbage and Kale Cultivar Comparison Study: Growth Characteristics and Response to Daminozide and Uniconazole Sprays

HortScience ◽

10.21273/hortsci.35.4.565e ◽

2000 ◽

Vol 35 (4) ◽

pp. 565E-565d ◽

Cited By ~ 2

Author(s):

James L. Gibson ◽

Brian E. Whipker

Keyword(s):

Plant Growth ◽

Brassica Oleracea ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Color Change ◽

Growth Characteristics ◽

Comparison Study ◽

Effective Height ◽

Height Control ◽

Ornamental Kale

Twenty-six ornamental cabbage and kale (Brassica oleracea var. acephala L.) cultivars were transplanted into 20.8-cm (8-inch) pots in Fall 1998 to classify their foliage traits and determine their response to the plant growth regulator (PGR) daminozide. Daminozide foliar sprays were applied at 0, 2500, or 5000 mg·L–1 (ppm) 3 weeks after potting. Two cultivars treated with 2500 mg.L-1 and eight cultivars treated with 5000 mg·L–1 were significantly smaller in height when compared to the nontreated plants. Using the Range/lsd formula, the vigor of the cultivars was classified by height. Foliage characteristics were described and cultivars of ornamental cabbage, notched ornamental kale, and curly ornamental kale were selected based on the shortest number of days until a significant center color change and the largest center color diameter. In Fall 1999, recommended cultivars selected in 1998 were treated with daminozide at 5000 mg·L–1 or uniconazole at 5 mg·L–1 14 days after potting, plus a nontreated control. All cultivars responded similarly to the PGRs with greater control being observed with daminozide with a smaller plant height of 13% as compared to 6% for uniconazole. For effective height control, PGR applications to ornamental cabbage and kale should be applied 2 weeks after potting.

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Plant Growth Regulator-Brassinolide for Mitigating Field Waterlogging Stress on Maize

International Journal of Plant & Soil Science ◽

10.9734/ijpss/2019/v30i330178 ◽

2019 ◽

pp. 1-14

Author(s):

Victoria Otie ◽

AN Ping ◽

Ali Ibrahim ◽

Egrinya Eneji

Keyword(s):

Plant Growth ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Dry Matter ◽

Block Design ◽

Growth And Yield ◽

Radiation Absorption ◽

Waterlogging Stress ◽

Maize Varieties ◽

Maize Plants

Aim: To assess the pleiotropic role of a plant growth regulator, commercially identified as brassinolide (BR) in mitigating waterlogging stress imposed on maize. Study Design: A factorial combination of two maize varieties [Ikom White (IKW) and Oba-98], two BR levels (0 and 250 ml) and two waterlogging stages of maize growth [control (WL0) and seedling stage (WL1)], arranged as a split-split plot in a randomized complete block design with three replications was used. Place and Duration of Study: Akpabuyo Local Government Area, Cross River State-Nigeria. A two-year field experiment was conducted during the dry seasons of December 2016 and December 2017. Methodology: Waterlogging test was conducted on plots by demarcating them with 3.6 by 1.7 m metal sheets buried to a depth of 60 cm to prevent lateral soil-water movement. Two maize seeds were sown at 25 cm within and 75 cm between rows. The BR (250 ml) was sprayed foliar at 21 DAS. The non-waterlogging plots served as control. Observations were made on growth and yield variables as well as the plant's physiological traits. Results: Waterlogging significantly reduced the growth attributes of maize and increased (p≤0.05) the leaf moisture content. The photosynthetically active radiation on maize plants was substantially reduced (p≤0.05) by the waterlogging stress. Dry matter yield (DMY) and nutrient uptake in the leaves, stems and grains were reduced (p≤0.05) at both silking and at harvest. The effect of the BR was greater in Oba-98 with higher nutrient contents, radiation absorption, dry matter and grain yields than IKW. Conclusion: Treatment of maize plants with BR could induce some tolerance of field waterlogging. Thus, for optimum efficiency in maize production under stressed soil condition of waterlogging, it is recommended that the foliar spray of BR at the 250 ml per plant rate be considered.

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An ABA Functional Analogue B2 Enhanced Salt Tolerance by Inducing the Root Elongation and Reducing Peroxidation Damage in Maize Seedlings

International Journal of Molecular Sciences ◽

10.3390/ijms222312986 ◽

2021 ◽

Vol 22 (23) ◽

pp. 12986

Author(s):

Shiying Geng ◽

Zhaobin Ren ◽

Lijun Liang ◽

Yumei Zhang ◽

Zhaohu Li ◽

...

Keyword(s):

Salt Stress ◽

Salt Tolerance ◽

Plant Growth ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Growth And Yield ◽

The Novel ◽

Root Shoot Ratio ◽

Maize Leaves ◽

Hydroponic Conditions

Salt stress negatively affects maize growth and yield. Application of plant growth regulator is an effective way to improve crop salt tolerance, therefore reducing yield loss by salt stress. Here, we used a novel plant growth regulator B2, which is a functional analogue of ABA. With the aim to determine whether B2 alleviates salt stress on maize, we studied its function under hydroponic conditions. When the second leaf was fully developed, it was pretreated with 100 µM ABA, 0.01 µM B2, 0.1 µM B2, and 1 µM B2, independently. After 5 days treatment, NaCl was added into the nutrient solution for salt stress. Our results showed that B2 could enhance salt tolerance in maize, especially when the concentration was 1.0 µMol·L−1. Exogenous application of B2 significantly enhanced root growth, and the root/shoot ratio increased by 7.6% after 6 days treatment under salt stress. Compared with control, the ABA level also decreased by 31% after 6 days, which might have resulted in the root development. What is more, B2 maintained higher photosynthetic capacity in maize leaves under salt stress conditions and increased the activity of antioxidant enzymes and decreased the generation rate of reactive oxygen species by 16.48%. On the other hand, B2 can enhance its water absorption ability by increasing the expression of aquaporin genes ZmPIP1-1 and ZmPIP1-5. In conclusion, the novel plant growth regulator B2 can effectively improve the salt tolerance in maize.

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THE EFFECT OF A SEAWEED EXTRACT CONTAINING CYTOKININ ON THE GROWTH AND YIELD OF BARLEY

Canadian Journal of Plant Science ◽

10.4141/cjps90-140 ◽

1990 ◽

Vol 70 (4) ◽

pp. 1163-1167 ◽

Cited By ~ 4

Author(s):

J. S. TAYLOR ◽

K. N. HARKER ◽

J. M. ROBERTSON ◽

K. R. FOSTER

Keyword(s):

Hordeum Vulgare ◽

Plant Growth ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Field Conditions ◽

Seaweed Extract ◽

Growth And Yield ◽

Hordeum Vulgare L ◽

Beneficial Effects ◽

Seaweed Extracts

A cytokinin-containing seaweed extract, Nitrozyme™ (Nitrozyme1), was tested under field conditions over 4 yr for its effects on the growth and yield of barley (Hordeum vulgare L.). In 1986 and 1987, Nitrozyme did not increase yield and had no beneficial effects on growth of Harrington and Bonanza barley. In 1988 and 1989, the effects of Nitrozyme on barley (cv. Leduc) were compared against those of kinetin, a synthetic cytokinin. Neither Nitrozyme nor kinetin had an effect on growth or yield.Key words: Nitrozyme, seaweed extracts, cytokinins, kinetin, plant growth regulator, Hordeum vulgare L.

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Plant growth regulator-mediated anti-herbivore responses of cabbage ( Brassica oleracea ) against cabbage looper Trichoplusia ni Hübner (Lepidoptera: Noctuidae)

Pesticide Biochemistry and Physiology ◽

10.1016/j.pestbp.2016.10.005 ◽

2017 ◽

Vol 141 ◽

pp. 9-17 ◽

Cited By ~ 1

Author(s):

Ian M. Scott ◽

R. Samara ◽

J.B. Renaud ◽

M.W. Sumarah

Keyword(s):

Plant Growth ◽

Brassica Oleracea ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Trichoplusia Ni ◽

Cabbage Looper ◽

Herbivore Responses ◽

Lepidoptera Noctuidae

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Plant growth regulators promote growth and yield of summer tomato (lycopersicone sculentum Mill.)

Progressive Agriculture ◽

10.3329/pa.v26i1.24512 ◽

2015 ◽

Vol 26 (1) ◽

pp. 32-37 ◽

Cited By ~ 3

Author(s):

M Rahman ◽

MA Nahar ◽

MS Sahariar ◽

MR Karim

Keyword(s):

Plant Growth ◽

Plant Height ◽

Plant Growth Regulators ◽

Growth Regulators ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Fruit Weight ◽

Fruit Yield ◽

Growth And Yield ◽

The Impact

An experiment was conducted at the Horticulture Farm of Bangladesh Agricultural University, Mymensingh to test the impact of plant growth regulators on growth and yield of summer tomato. The experiment consisted of two tomato varieties viz. BARI Hybrid Tomato-4 and BARI Hybrid Tomato-8 and four types of plant growth regulator (PGR)viz.,(i) control (without PGR), (ii) 4-CPA (4-chlorophenoxy acetic acid), GA3 (gibberellic acid) and 4-CPA +GA3. The two-factor experiment was laid out in randomized complete block design with three replications. The results of the experiment revealed that significant variations were observed for most of the characters studied. At 75 DAT, the tallest plant (79.35 cm), number of flowers and fruits (38.11 and 19.04, respectively) plant-1, individual weight (58.44 g) and fruit yield (22.75 t ha-1) were found in BARI Hybrid Tomato-8.At 75 DAT the maximum plant height (87.90 cm), number of flowers and fruits (49.04 and 21.9, respectively) plant-1, individual fruit weight (61.16 g), and fruit yield (27.28 tha-1) were found when 4-CPA + GA3 applied together, whereas the minimum for these characters were recorded from control plants. In case of combined effect of variety and plant growth regulator, the maximum plant height (87.90 cm), number of flowers and fruits (49.04 and 21.91, respectively) plant-1, individual fruit weight (61.16 g) and fruit yield (27.28 t ha-1) were observed in BARI Hybrid Tomato-8 when treated with 4-CPA + GA3together, and the minimum for all these parameters were found in control plants. The results of the present study suggest thatboth 4-CAP and GA3together can be practiced for increasing summer tomato production for both the varieties.Progressive Agriculture 26:32-37, 2015

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Ornamental Cabbage and Kale Cultivar Comparison Study: Growth Characteristics and Response to Daminozide and Uniconazole Foliar Sprays

HortTechnology ◽

10.21273/horttech.11.3.376 ◽

2001 ◽

Vol 11 (3) ◽

pp. 376-380 ◽

Cited By ~ 2

Author(s):

James L. Gibson ◽

Brian E. Whipker

Keyword(s):

Plant Growth ◽

Brassica Oleracea ◽

Plant Height ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Color Change ◽

Growth Characteristics ◽

Comparison Study ◽

Height Control ◽

Ornamental Kale

Twenty-six ornamental cabbage and kale (Brassica oleracea var. acephala) cultivars were grown in 8-inch (20.8-cm) diameter pots during Fall 1998 to classify their foliage traits and determine their response to the plant growth regulator (PGR) daminozide. Cultivar vigor was classified by height. Foliage characteristics were described and cultivars of ornamental cabbage, notched ornamental kale, and curly ornamental kale were selected for retail or wholesale markets based on the shortest number of days until a significant center color change, the largest center color diameter, and attractive foliage characteristics. Two cultivars treated with 2,500 ppm (mg·L-1) daminozide and eight cultivars treated with 5,000 ppm were significantly smaller in height compared to nontreated plants. Plants were treated 6 weeks after sowing, and the response to the PGRs may have been diminished by the age of the plant. Therefore, to further investigate PGR efficacy, seven outstanding cultivars selected in 1998 were treated with 5,000 ppm daminozide or 5 ppm uniconazole 14 days after potting (4 weeks after sowing) in Fall 1999. Greater control was observed with daminozide at 5,000 ppm in 1999 with a 13% smaller plant height as compared to 9% in 1998, when compared to the nontreated control. For greater height control, PGR applications to ornamental cabbage and kale should be applied 4 weeks after sowing.

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