scholarly journals Effect of Plant Growth Regulators on Propagule Formation in Hemerocallis spp. and Hosta spp.

HortScience ◽  
2006 ◽  
Vol 41 (3) ◽  
pp. 651-653 ◽  
Author(s):  
Mélanie Leclerc ◽  
Claude D. Caldwell ◽  
Rajasekaran R. Lada ◽  
Jeffrey Norrie
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Gold Standard ◽  
Field Experiments ◽  
Chlormequat Chloride ◽  
Seaweed Concentrate ◽  
Prohexadione Calcium ◽  
Experimental Preparation ◽  
Commercial Seaweed Extract

Field experiments were conducted in 2002 and 2003 to evaluate the effects of selected plant growth regulators on propagule production in Hemerocallis `Happy Returns' and Hosta `Gold Standard'. Benzyladenine (BA), chlormequat chloride (Cycocel), ethephon (Ethrel), prohexadione calcium (Apogee), and an experimental preparation of commercial seaweed extract (Acadian Seaplants Limited Liquid Seaweed Concentrate) amended with BA and IBA were tested at two times of application and three rates of application. Results with Hemerocallis showed that the application of the seaweed/PGR mixture at 3000 mg·L–1, Cycocel at 3000 mg·L–1 or BA at 2500 mg·L–1 applied at flowering, increased the number of plants producing two divisions compared to control plants. In Hosta, no increase in divisions under any treatments was observed.

scholarly journals Applications of Plant Growth Regulators to Container-grown Citrus Trees Affect the Biology and Behavior of the Asian Citrus Psyllid

2012 ◽  
Vol 137 (1) ◽  
pp. 3-10 ◽  
Author(s):  
Antonios E. Tsagkarakis ◽  
Michael E. Rogers ◽  
Timothy M. Spann
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Carbon Assimilation ◽  
Nutrient Status ◽  
Asian Citrus Psyllid ◽  
Chlormequat Chloride ◽  
Important Pest ◽  
Prohexadione Calcium ◽  
And Behavior

Asian citrus psyllid [ACP (Diaphorina citri)] is an important pest of citrus (Citrus sp.) in many citrus-growing regions of the world because of its status as the vector of huanglongbing disease [HLB (citrus greening)]. There are currently no HLB-resistant citrus genotypes and no proven treatments for the disease; thus, vector control through the use of frequent prophylactic pesticide applications is key to managing the spread of this disease. However, this practice is unsustainable and other means of altering ACP biology or reducing populations are needed. To this end, six plant growth regulators (PGRs) were tested to determine their effect on citrus tree vegetative growth and the subsequent impact on the biology of ACP. In greenhouse and growth chamber experiments, ACP reared on trees treated with prohexadione calcium and mefluidide exhibited significant reductions in both fecundity and survivorship, whereas uniconazole affected only fecundity and paclobutrazol affected only survivorship. No significant effects of PGRs on adult ACP weight were observed except on uniconazole-treated trees. No eggs were laid on dikegulac sodium-treated trees; however, this was likely the result of severe phytotoxicity rather than a true PGR effect. Oviposition rate was lower on all the PGR-treated trees, except chlormequat chloride under greenhouse conditions, compared with untreated control trees. In general, oviposition was delayed on PGR-treated trees compared with untreated controls. The observed changes in ACP biology and behavior after PGR treatment were not the result of a reduction in the number of suitable oviposition sites (i.e., growth reduction) or toxicity of the PGRs to ACP, suggesting there were PGR-induced plant biochemical changes that altered host plant quality. Leaf nutrient analyses and photosynthesis indicated that there were no correlative changes in plant nutrient status or carbon assimilation that led to the changes in ACP behavior, although it is possible that phloem-specific nutrient or carbohydrate changes could have occurred that were not detected in our whole-leaf analyses. These results support previous studies in which the fitness of various insect species has been affected by PGR applications, but more research is needed to understand the changes in plant chemistry that are responsible.

scholarly journals Inter-row stubble seeding and plant growth regulators to improve field pea standability and production

2019 ◽  
Vol 99 (2) ◽  
pp. 184-198
Author(s):  
S.M. Strydhorst ◽  
R.C. Yang ◽  
K.S. Gill ◽  
R. Bowness
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Field Experiments ◽  
Seed Quality ◽  
Block Design ◽  
Field Pea ◽  
Chlormequat Chloride ◽  
Major Barrier ◽  
Wheat Stubble

Field pea (Pisum sativum) is an important economic and rotational crop in Alberta, Canada; however, standability problems are a major barrier to increasing seeded area in highly productive growing environments. Field experiments were conducted from 2015 to 2017 at three sites in the central and Peace regions of Alberta to determine if (i) pea standability and production can be improved using inter-row seeding into untilled standing wheat stubble; (ii) pea standability and production can be improved using chlormequat chloride (CCC), trinexapac-ethyl (TXP), or ethephon (ETH) plant growth regulators (PGRs); and (iii) PGR responses are cultivar-specific. Depending on the site–year, there were 16–17 inter-row seeding, PGR, and cultivar treatment combinations arranged in a randomized complete block design. Relative to the no-stubble control, inter-row seeding into 20- or 30-cm-tall, untilled wheat stubble significantly improved standability between 6% and 23% under conditions when lodging occurred. It also reduced days to maturity and increased 1000-seed weight, but had no effect on yield. Individual PGR treatments (CCC, TXP, and ETH) generally had small and inconsistent impacts on agronomic traits, yield, and seed quality. In dry conditions, PGRs reduced yield. CDC Meadow was slightly more responsive to PGR treatments than AAC Lacombe, indicating responses may be cultivar-specific. Because of the small and inconsistent responses, PGRs have little value as an agronomic tool in field pea. Alternatively, inter-row seeding into standing wheat stubble is a low-cost, easy to implement practice for improving field pea standability.

scholarly journals Synthesis, Characterization, and Encapsulation of Novel Plant Growth Regulators (PGRs) in Biopolymer Matrices

2021 ◽  
Vol 22 (4) ◽  
pp. 1847
Author(s):  
Kristina Vlahoviček-Kahlina ◽  
Slaven Jurić ◽  
Marijan Marijan ◽  
Botagoz Mutaliyeva ◽  
Svetlana V. Khalus ◽  
...  
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Electrostatic Interactions ◽  
Growth Regulation ◽  
Field Experiments ◽  
Dimethyl Ester ◽  
Plant Growth Regulation ◽  
Derivatives Of ◽  
Growth Regulating Activity

Novel plant growth regulators (PGRs) based on the derivatives of dehydroamino acids 2,3-dehydroaspartic acid dimethyl ester (PGR1), Z-isomer of the potassium salt of 2-amino-3-methoxycarbonylacrylic acid (PGR2) and 1-methyl-3-methylamino-maleimide (PGR3) have been synthesized and their growth-regulating properties investigated. Laboratory testing revealed their plant growth-regulating activity. PGR1 showing the most stimulating activity on all laboratory tested cultures were used in field experiments. Results showed that PGR1 is a highly effective environmentally friendly plant growth regulator with effects on different crops. Biopolymeric microcapsule formulations (chitosan/alginate microcapsule loaded with PGR) suitable for application in agriculture were prepared and characterized. Physicochemical properties and release profiles of PGRs from microcapsule formulations depend on the molecular interactions between microcapsule constituents including mainly electrostatic interactions and hydrogen bonds. The differences in the microcapsule formulations structure did not affect the mechanism of PGRs release which was identified as diffusion through microcapsules. The obtained results opened a perspective for the future use of microcapsule formulations as new promising agroformulations with a sustained and target release for plant growth regulation.

Multiresidue Analysis of Plant Growth Regulators in Grapes by Triple Quadrupole and Quadrupole–Time of Flight-Based Liquid Chromatography/Mass Spectrometry

2011 ◽  
Vol 94 (6) ◽  
pp. 1715-1721 ◽  
Author(s):  
Dasharath P Oulkar ◽  
Kaushik Banerjee ◽  
Sunil Kulkarni
Keyword(s):  
Acetic Acid ◽  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Multiple Reaction Monitoring ◽  
Time Of Flight ◽  
Accurate Mass ◽  
Multiresidue Analysis ◽  
Chlormequat Chloride ◽  
Grape Berries

Abstract A selective and sensitive LC-MS/MS method is presented for simultaneous determination of 12 plant growth regulators, viz., indol-3-acetic acid, indol-3-butyric acid, kinetin, zeatin, 6-benzyl aminopurine, gibberellic acid, abscisic acid, chlormequat chloride, forchlorfenuron, paclobutrazole, daminozide, and 2,4-dichlorophenoxy acetic acid, in bud sprouts and grape berries. The sample preparation method involved extraction of homogenized sample (5 g) with 40 mL methanol (80%), and final determination was by LC-MS/MS in the multiple reaction monitoring (MRM) mode with time segmentation for quantification supported by complementary analysis by quadrupole-time of flight (Q-TOF) MS with targeted high-resolution MS/MS scanning for confirmatory identification based on accurate mass measurements. The recovery of the test compounds ranged within 90–107% with precision RSD less than 5% (n = 6). The method could be successfully applied in analyzing incurred residue samples, and the strength of accurate mass analysis could be utilized in identifying the compounds in cases where the qualifier MRM ions were absent or at an S/N less than 3:1 due to low concentrations.

scholarly journals The Effect of Increasing Application Rates of Nine Plant Growth Regulators on the Turf and Stolon Characteristics of Pot-grown ‘Patriot’ Hybrid Bermudagrass

2015 ◽  
Vol 25 (3) ◽  
pp. 397-404 ◽  
Author(s):  
Marco Volterrani ◽  
Nicola Grossi ◽  
Monica Gaetani ◽  
Lisa Caturegli ◽  
Aimila-Eleni Nikolopoulou ◽  
...  
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Cynodon Dactylon ◽  
Warm Season ◽  
Internode Length ◽  
Chlormequat Chloride ◽  
Application Rates ◽  
Stolon Length ◽  
Propagation Material

Vegetatively propagated warm-season turfgrasses are established with methods that rely on large quantities of propagation material and subsequent plant growth support. The precision seeding adopted for some seed propagated crops controls the depth and spacing at which seeds are placed in the soil. Sprigs that are reduced in length could potentially be suitable for existing machinery, and precision planting could enhance the efficiency of use of the propagation material. The aim of the present study was to carry out a preliminary screening on products known to act as plant growth regulators to explore their potential use for controlling stolon development and elongation of ‘Patriot’ hybrid bermudagrass (Cynodon dactylon × C. transvaalensis) grown in pots for propagation purposes. Trinexapac-ethyl (TE), chlormequat chloride (CM), paclobutrazol (PB), propiconazole (PPC), diquat (DQ), flazasulfuron (FS), glyphosate (GP), ethephon (EP), and gibberellic acid (GA) were applied to pot-grown ‘Patriot’ hybrid bermudagrass turf in eight different application rates, ranging for each product from the minimum expected effective rate to a potentially harmful rate. Of the tested treatments, TE applied at 2.0 kg·ha−1 and PB applied at 1.0 kg·ha−1 reduced stolon and internode length without causing a reduction in the stolon number or turf quality. PPC was also effective in reducing stolon length, but the effect on internode length was not statistically significant. Stolon length was unaffected by CM, while DQ and GP induced stolon elongation. FS, EP, and GA affected stolon length without a consistent relation between stolon length and application rate. The chemical suppression of stolon elongation in pot-grown ‘Patriot’ hybrid bermudagrass can contribute to controlling sprig size for use with precision seeding machinery.

scholarly journals Response of Coleus (Solenostemon scutellarioides) to Plant Growth Regulators Applied during Propagation

HortScience ◽  
2006 ◽  
Vol 41 (4) ◽  
pp. 983E-984
Author(s):  
Jennifer K. Boldt ◽  
James E. Barrett
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Specific Response ◽  
Chlormequat Chloride ◽  
Breeding Lines ◽  
Chemical Treatments ◽  
Solenostemon Scutellarioides ◽  
Axillary Branching ◽  
Color Alteration

A daminozide plus chlormequat chloride tank mix spray was applied to six Coleus cultivars or breeding lines at different times during propagation. For UF 03-8-10 and `Coco Loco', plants sprayed on day 7 or day 10 were shorter than control plants at transplant, but plants sprayed on day 13 were not. Other cultivars did not respond to single applications. Five of the six cultivars responded to application on days 7 and 13. Plants of UF 03-8-3 and `Coco Loco' were significantly shorter than control plants at transplant. Plants of UF 03-8-10, UF 03-6-1, and UF 03-17-8 were shorter than control plants at 3 weeks after transplant. `Hurricane Louise' did not respond to the tank mix. A second study found a cultivar specific response to three chemical treatments applied as a spray on day 10 of propagation. At transplant, UF 03-8-10, UF 03-8-3, UF 03-6-1, and `Coco Loco' plants sprayed with the tank mix at 2500 plus 1500 mg·L-1, respectively, were significantly shorter than the control plants. A uniconazole spray at 2 mg·L-1 reduced elongation in UF 03-8-10, UF 03-8-3, and UF 03-6-1, compared to control plants. Ethephon at 250 mg·L-1 reduced elongation in UF 03-8-10, UF 03-8-3, and `Coco Loco' plants. None of the chemical sprays reduced elongation in `Hurricane Louise' at the concentrations applied. Ethephon increased axillary branching in all cultivars, and induced lower leaf abscission in UF 03-17-8 and `Hurricane Louise'; leaf malformation in UF 03-6-1 and `Coco Loco'; and color alteration in UF 03-6-1, UF 03-8-3, and `Coco Loco'.

scholarly journals Influence of plant growth regulators on fatty acid composition of Simarouba glauca DC.

2021 ◽  
pp. 1-3
Author(s):  
S. Patil Manasi ◽  
V. Waghmode Ahilya ◽  
Chirag Narayankar ◽  
D. K. Gaikwad
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Plant Growth ◽  
Polyunsaturated Fatty Acids ◽  
Plant Growth Regulators ◽  
Acid Composition ◽  
Growth Regulators ◽  
Chlormequat Chloride ◽  
Simarouba Glauca

Simarouba glauca is a medicinally important oil yielding plant. It is a rainfed wasteland evergreen edible oil tree. Presowing soaked seeds of Simarouba glauca in various Plant Growth Regulators (PGRs) are analyzed to estimate their fatty acid composition. The fatty acids extraction was done using petroleum ether and fatty acid methyl esters (FAMEs) were analyzed by Gas Chromatography with Flame Ionization Detector (GC-FID). Due to the application of growth regulators stearic acid, lingoceric acid and linolenic acid enhances noticeably, while, total saturated fatty acids are augmented due to cysteine, Salicylic Acid (SA) and methionine treatments and monosaturated fatty acids elevated due to the application of 6-Benzylaminopurine (6-BA) whereas polyunsaturated fatty acids enhanced in response to Gibberellic Acid (GA) and Chlormequat chloride (CCC). The PGR induced changes in fatty acid composition predominantly in polyunsaturated fatty acids may certainly recover the oil quality of S. glauca seeds.

scholarly journals Management of poppy (Papaver somniferum L.) stand height using growth regulators

2017 ◽  
Vol 53 (No. 1) ◽  
pp. 55-60
Author(s):  
Spitzer Tomáš ◽  
Bílovský Jan
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Field Experiments ◽  
Papaver Somniferum ◽  
Stand Height

The possibility of reduce the length of poppy plants and their risk of lodging by applying selected plant growth regulators and effects on the plant and yield were studied in field experiments during 2010–2012. Statistically significant reduction was achieved only with ethephon (576 g a.i./ha) in all experimental years. In 2010 reduction for metconazole (60 g a.i./ha) was recorded. In 2012, ethephon at rates of 576 and 288 g a.i./ha prevented significantly poppy lodging. The 576 g a.i./ha rate was phytotoxic and decreased yield. The commonly used 576 g a.i./ha rate diminished heights by 16–20 cm in all experimental years and significantly reduced lodging in 2012, but decreased yields in two of the 3 years.

Production Potential of Pigeon Pea [Cajanus cajan (L.) Millsp.] as Influenced by Crop Geometry and Plant Growth Regulators

2021 ◽  
Author(s):  
S.U. Pawar ◽  
W.N. Narkhede ◽  
D.N. Gokhale ◽  
I.A.B. Mirza
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Foliar Application ◽  
Pigeon Pea ◽  
Chlormequat Chloride ◽  
Yield Parameters ◽  
Main Plot ◽  
Source Sink ◽  
Crop Geometry

Background: Pigeonpea being highly branching and indeterminate growth habit responds very well to crop geometry. Hence to achieve potential yields, it is important to maintain optimum plant population which can effectively utilize available moisture, nutrients and solar radiation. The plant growth regulators are also known to enhance the source sink relationship and stimulate the translocation of photo assimilates, thereby increase the productivity. Methods: A field experiment was conducted at experimental farm of Agronomy Department, V.N.M.K.V., Parbhani during kharif season of 2018 and 2019. The experiment was laid out in split plot design with four main plot treatments comprised of four crop geometries as 90 cm x 20 cm, 120 cm x 20 cm 60-120 cm x 20 cm and 75-150 cm x 20 cm and sub plot treatments were five treatments on foliar application of plant growth regulators i.e. NAA @ 40 ppm, Mepiquat chloride @ 50 g a.i. ha-1, Brassinosteroids @ 0.1 ppm, Chlormequat Chloride @ 75 g a.i ha-1 and control. Result: The crop geometry of 120 cm x 20 cm and 75-150 cm x 20 cm recorded higher values of all yield parameters followed by crop geometry of 60-120 cm x 20 cm. While the seed, straw and biological yield of pigeonpea as well as highest net realization of Rs. 72072 ha-1 was obtained with crop geometry of 60-120 cm x 20 cm followed by 90 cm x 20 cm. Among the plant growth regulators foliar application of Brassinosteroids @ 0.1 ppm (G3) tended to recorded higher yield parameters, seed yield and fertility coefficient of pigeonpea as well as highest net realization followed by foliar application of NAA @ 40 ppm.

Yield and quality of cauliflower hybrids depending on the plant growth regulators usage

2021 ◽  
Vol 2020 (1-2) ◽  
pp. 34-44
Author(s):  
L.M. Puzik ◽  
L.O. Haiova ◽  
N.O. Didukh ◽  
O.V. Hudym
Keyword(s):  
Chemical Composition ◽  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Field Experiments ◽  
Growing Season ◽  
Average Weight ◽  
Physical Parameters ◽  
Dry Matter Content ◽  
F1 Hybrid

The article presents the results of the research conducted during the 2015– 2017 years. On the experimental field of the Department of Horticulture and Storage of V.V. Dokuchaev KNAU was determined the influence of the plant growth regulators on the formation of a marketable yield and the content of some components of the cauliflower hybrids chemical composition. The early ripening hybrids of cauliflower Livingstone F1 and Kul F1 were studied. The Humisol-super, Vympel, and Megafol were taken for the study. The experience was a two-factor: factor A was the features of the hybrid, factor B was drug treatment. The repetition was four-fold. Field experiments were carried out according to generally accepted methods. The cauliflowers` soil preparation and the plant care were carried out according to the generally accepted recommendations. Treatment with growth regulators was carried out by spraying plants during the growing season according to the manufacturers' recommendations. The first spraying was carried out after planting seedlings in the open ground; the subsequent spraying had been carried every 14 days. An option without treatment was taken as a control. As a result of the studies, it was found that treatment of cauliflower plants with growth regulators during the growing season significantly affects the yield of hybrids. Over the years of research, the highest yield of the Livingston F1 hybrid was obtained with the Megafol treatment, – 12,9 t/ha (+1,6 t/ha to control). The highest yield of the Kul F1 hybrid was 13,4 t/ha (+1,0 t/ha to control) during Humisol-super treatment. It has been proved that the usage of the growth regulators influenced the physical indicators of the commercial yield of hybrids. During the 2015–2017 years, the average weight of cauliflower heads increased by 2,1–11,8 % compared to the control, depending on the treatment. The Megafol had a greater effect on the hybrids. Plants` treatment with growth regulators increased the average volume of the hybrid head by 1,3–11,3 % compared to the control. In terms of influence on this indicator, Megafol and Humisol-super were the best drugs. It has been established that plant growth regulators affect the components of the cauliflowers' heads' chemical composition. The Vympel and Megafol increased the dry matter content in the Kul F1 hybrid by 1,0 and 1,4 %, respectively, compared with the control. The treatment of plants with the Humisol-super increased the ascorbic acid content in the heads of the Livingston F1 hybrid by 4,3 % compared to the control. It is recommended to apply the treatment of plants during the growing season with Humisol-super (1,5l/ha) and Megafol (2,3 l/ha) every 14 days to increase the yield and improve the physical parameters of cauliflower heads. Key words: cauliflower, hybrids, plant growth regulators, crop yields, physical yield indicators, chemical components.

Sign in / Sign up

Export Citation Format

Share Document