Effects of the nitrification inhibitor nitrapyrin and the plant growth regulator gibberellic acid on yield-scale nitrous oxide emission in maize fields under hot climatic conditions

Abstract Moroccan pincushion (Pterocephalus depressus) is a drought-tolerant perennial that is being used in landscapes throughout arid areas of the western United States. This paper describes two experiments researching vegetative cutting production from stock plants. Moroccan pincushion stock plants received foliar applications of gibberellic acid (GA3), benzyladenine, ethephon, or auxin [indole-3-butyric acid (IBA)] plant growth regulators (PGR). Plant growth regulators were applied singularly and in combination with GA3 to determine efficacy on stock plant growth. A propagation study was conducted simultaneously to determine effects of these different PGR treatments applied to stock plants on the rooting of moroccan pincushion cuttings. The stock plant study showed GA3 + benzyladenine application increased cutting production over other PGR treatments. Fresh weight of moroccan pincushion cuttings did not differ among treatments. While cuttings did not differ in dry weight in experiment 1, statistical differences were observed in experiment 2. However, these differences in dry weight did not affect the quality of the cuttings. Cuttings from stock plants treated with GA3 + IBA treatment had the highest numerical growth index [(height + width + width)/3]. Cuttings from stock plants treated with GA3 alone or in combination with another PGR were all greater in average growth index and statistically differed from those without GA3 being applied. PGR treatments did not affect rooting percentages of the cuttings with nontreated stock plant cuttings successfully rooting at an average rate of 95%. However, GA3 + IBA was the only treatment where cuttings had 100% rooting for both experiments, indicating potential rooting benefits. Index words: Plant growth regulator, propagation, Pterocephalus depressus, vegetative cuttings. Species used in this study: Moroccan pincushion [Pterocephalus depressus Archibald]. Chemicals used in this study: gibberellic acid (GA3), benzyladenine, ethephon, indole-3-butyric acid (IBA).

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Effects of Gibberellic Acid Treatments on Fruit and Seed Development of Muscadine Grapes

HortScience ◽

10.21273/hortsci.31.4.662f ◽

1996 ◽

Vol 31 (4) ◽

pp. 662f-663

Author(s):

J. Lu ◽

O. Lamikanra

Keyword(s):

Plant Growth ◽

Gibberellic Acid ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Maximal Increase ◽

Genotype Variation ◽

Before And After ◽

Early Ripening ◽

Grape Cultivars ◽

Muscadine Grapes

Gibberellic acid, a plant growth regulator commonly sprayed for seedless bunch grape cultivars, was used to spray on the seeded muscadine grape cultivars `Carlos', `Fry', `Higgins' and `Triumph'. GA3 at 100 to 300 ppm were sprayed on leaves and fruit clusters before and after anthesis. The flower/fruit clusters also were dipped into a much higher concentration (1000 ppm) in addition to the sprayed concentration of GA3. Berry weight significantly increased in all the sprayed vines, with a maximal increase up to 50%. Early and more uniform ripening was observed in the cultivar `Triumph'. More than 20% of seedless berries also were found on the GA3-sprayed `Triumph' vines. However, the latter two responses (early ripening and seedlessness) did not occur in other cultivars tested. Similar results also were obtained in the dipping treatments. The results indicated that the seeded muscadine grapes responded well to the GA3 treatments in general, but genotype variation is obvious.

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Spray application factors and plant growth regulator performance: II. Foliar uptake of gibberellic acid and 2, 4-D

Pesticide Science ◽

10.1002/ps.2780550209 ◽

1999 ◽

Vol 55 (2) ◽

pp. 166-174

Author(s):

Moritz Knoche ◽

Martin J Bukovac

Keyword(s):

Plant Growth ◽

Gibberellic Acid ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Foliar Uptake ◽

Spray Application

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Optimization of Gibberellic Acid Production in Endophytic Bacillus cereus Using Response Surface Methodology and Its Use as Plant Growth Regulator in Chickpea

Journal of Plant Growth Regulation ◽

10.1007/s00344-021-10492-2 ◽

2021 ◽

Author(s):

Nitin Baliyan ◽

Sandhya Dhiman ◽

Shrivardhan Dheeman ◽

Sandeep Kumar ◽

Naveen Kumar Arora ◽

...

Keyword(s):

Response Surface Methodology ◽

Plant Growth ◽

Gibberellic Acid ◽

Bacillus Cereus ◽

Response Surface ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Acid Production

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Spray application factors and plant growth regulator performance: II. Foliar uptake of gibberellic acid and 2,4-D

Pesticide Science ◽

10.1002/(sici)1096-9063(199902)55:2<166::aid-ps886>3.0.co;2-2 ◽

1999 ◽

Vol 55 (2) ◽

pp. 166-174 ◽

Cited By ~ 1

Author(s):

Moritz Knoche ◽

Martin J Bukovac

Keyword(s):

Plant Growth ◽

Gibberellic Acid ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Foliar Uptake ◽

Spray Application

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Formation of productivity of sowing peas depending on technology measures of cultivation in the conditions of the western forest-steppe

EUREKA Life Sciences ◽

10.21303/2504-5695.2021.001751 ◽

2021 ◽

pp. 3-8

Author(s):

Mykola Bakhmat ◽

Oleksandr Chynchyk ◽

Kateryna Nebaba

Keyword(s):

Plant Growth ◽

Crop Rotation ◽

Growth Regulators ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Climatic Conditions ◽

Mineral Fertilizers ◽

Forest Steppe ◽

Main Research ◽

The Individual

In the conditions of the western Forest-steppe, leguminous crops, including sowing peas, are the main and most important source of vegetable protein, which solve the biological and ecological problems of modern agriculture in Ukraine. The article presents the main research results on the study of the effect of mineral fertilizers and growth regulators on the formation of the sowing peas productivity in the conditions of the western Forest-steppe. The field trifactor experiment was laid in the ten-field crop rotation in Podillia Research Center of State Agrarian and Engineering University in Podilya, during 2016–2018. The field experiment was laid down in the research ten-digit crop rotation. In microstages VVSN 55-65 (budding – flowering) crops were sprayed with growth regulators PlantaPeg, Еmistim С and Vympel. The studies carried out showed that the individual productivity of plants of the Chekbek variety was the best of all the varieties that were studied. It was found, that high indices of the mass of 1000 seeds were in the variants, where mineral fertilizers were used at a dose of N30P30K45 with the plant growth regulator Vympel. According to this fertilizer composition, the mass indices of 1000 seeds for peas of the Chekbek variety were 266.4 g, and for the Hotivskyi and Fargus varieties – 260.6 g and 238.4 g, respectively. The grain yield of peas is an integrated indicator of the action of all life factors on the plant organism during its growth and development. To a large extent, it depends on the biological characteristics of the variety, the supply of moisture and nutrients to the plant, technological methods of cultivation, as well as natural and climatic conditions. In our studies, the crops, fed with mineral fertilizers and growth regulators, were significantly less exposed to adverse factors, and the studied technology elements had a positive effect on the productivity of pea grain. The maximum biological yield was for the application of mineral fertilizers in doses of N30P30K45 and the plant growth regulator Vympel. For the varieties of Hotivskyi peas, these indicators were 3.79 t/ha, Chekbek 4.32 t/ha, and Fargus 3.30 t/ha

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Manipulating Primocane Architecture in Thornless Blackberry with Uniconazole, GA3, and BA

HortScience ◽

10.21273/hortsci.27.2.116 ◽

1992 ◽

Vol 27 (2) ◽

pp. 116-118 ◽

Cited By ~ 1

Author(s):

Hermen Malik ◽

Douglas D. Archbold

Keyword(s):

Plant Growth ◽

Gibberellic Acid ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Branch Length ◽

Dry Weight ◽

Thornless Blackberry

The potential for plant growth regulator (PGR) manipulation of `Chester Thornless' blackberry (fibus spp.) primocane growth was evaluated. PGR treatments included combinations of soil-applied uniconazole at 1, 5, 25, and 125 mg/plant and GA, foliar-applied one or two times at 100 ppm 3 and 4 weeks after a 25-mg/plant uniconazole application. Also, GA and BA were applied at 100 ppm alone or in combination one, two, or three times. Increasing rates of uniconazole reduced primocane length, leaflet count, and leaf, cane, and root dry weights. GA, applications reduced primocane length and increased branch elongation but failed to reverse the effects of uniconazole at 25 mg/plant, except those on branch length, leaflet count, and primocane dry weight. Only applications of BA + GA, increased both branch production and elongation and dry weights of some component tissues, while BA alone generally had no effects. Chemical names used: (E)-1-(p-chlorophenyl)-4,4-dimethyl-2-(1,2,4-triazol-1-yl)-1-penten-3-ol (uniconazole); N-(phenylmethyl)-1H-purin-6-amine (benzyladenine, BA); gibberellic acid (GA).

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