scholarly journals Effect of Chlormequat Chloride on Vegetative Growth, Photosynthetic Activities, and its Residual Dissipation in Thompson Seedless Grapevines

2021 ◽  
pp. 27-36
Author(s):  
S. D. Ramteke ◽  
S. R. Bhagwat ◽  
S. M. Khalate ◽  
A. H. Gavali ◽  
J. N. Kalbhor ◽  
...  
Keyword(s):  
Plant Growth ◽  
Vegetative Growth ◽  
Developmental Stages ◽  
Foliar Spray ◽  
Chlormequat Chloride ◽  
Linear Pattern ◽  
First Order Kinetics ◽  
Activity Yield ◽  
Photosynthetic Activities ◽  
Plant Growth Inhibitors

Chlormequat chloride is one of the important plant growth regulators which is a highly stable gibberellins biosynthesis inhibitor used to inhibit vegetative growth and cell elongation. Considering the importance of plant growth inhibitors, the present investigation was carried out to understand the effect of Chlormequat chloride with its different concentrations on vegetative growth, photosynthetic activities and its residual dissipation in Grapevines at two different locations one at Pune, Maharashtra India and second at Nashik, Maharashtra, India during the year 2018-2019. Chlormequat chloride was applied as a foliar spray, where the whole vines were sprayed at concentration of   500, 1000, 1500, 2000 and 2500 ppm with untreated control as a water spray; as a treatments with different developmental stages Viz 5th, 7th, and 15th leaf stage after foundation pruning. Morphological observations were recorded at 45 days and 90 days after foundation as well as fruit pruning. Application of Chlormequat chloride recorded reduced shoot length and Internodal distance while increased in cane diameters, leaf thickness after both the pruning’s in this investigation Photosynthetic activity, yield per vines and percent fruitfulness had significantly influenced with the application of Chlormequat chloride in grapevines. The dissipation of Chlormequat chloride was stable and indicated a non- linear pattern of degradation. Thus, implied that simple first-order kinetics might not be adequate to explain the dissipation behaviour of Chlormequat chloride in grapes.

THE INFLUENCE OF ANTIGIBBERELIN PREPARATIONS ON THE ANATOMICAL AND MORPHOLOGICAL INDICATORS OF SOYBEAN PLANTS

2020 ◽  
Vol 2 ◽  
pp. 26-31
Author(s):  
O. A. Shevchuk
Keyword(s):  
Plant Growth ◽  
Surface Area ◽  
Mechanism Of Action ◽  
Leaf Surface ◽  
Growth Inhibitors ◽  
Main Root ◽  
Chlormequat Chloride ◽  
Leaf Surface Area ◽  
Soybean Plants ◽  
Plant Growth Inhibitors

The specificity of the action of antigibberelin drugs is that they can influence the processes and intensity that cannot be corrected by agronomic measures of cultivation. The purpose of the work was to scientifically substantiate the use of plant growth inhibitors with an antigibberelin type of action as an element of soybean cultivation technology, to identify their effect on growth, development and productivity. The research was carried out on a soybean plants of the Triada variety. At a height of shoots 10-15 cm plants were treated with aqueous solutions: 0.5% tebuconazole, 0.2% ethephon and 0.5% chlormequat chloride until complete wetting of the leaves. Control plants were treated with water. During the research, morphological parameters, leaf surface area, and organ mass were defined. It was established that the use of plant growth inhibitors with an antigibberelinic mechanism of action (the ethylene producer esfone (0,2 %), the triazole-derived retardant tebuconazole (0,5 %) and the onium preparation chlormequat chloride (0,5 %) on soybean plants led to morphological and anatomical changes: decreasing of the mass of leaves and stem, increasing the thickness of the stem and root collar. The preparations reduced the length of internodes of soybean plants,, that created the preconditions for plant resistance to lodging. Plant growth inhibitors had different effects on the leaf surface area of soybean plants: there was an increase in this indicator by 24% for the use of chlormequat chloride, and processing with esfon and tebuconazole led to a decrease of 26% and 23% accordingly. Different effects of retardants were found on the length of the main root. Under the action of esfon the length of the main root decreased by 20%; the application of both chlormequatchloride and tebuconazole, this indication increased accordingly by 43% and 37%. The question of studying the influence of modern plant growth regulators with a different mechanism of action on the productivity of different varieties of legumes remains relevant

scholarly journals Foliar Application of Y-Aminobutyric Acid (GABA) Improves Vegetative Growth, and the Physiological and Antioxidative Potential of Daucus Carota L. under Water Deficit Conditions

2019 ◽  
Author(s):  
Rohina Bashir ◽  
Hafiza Naila Riaz ◽  
Muhammad Shafiq ◽  
Nusrat Parveen ◽  
Mekhled Mutiran Alenazi ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Plant Growth ◽  
Water Deficit ◽  
Vegetative Growth ◽  
Untreated Control ◽  
Production Management ◽  
Foliar Application ◽  
Foliar Spray ◽  
Field Capacity ◽  
Enzymatic Antioxidants

Scarcity of water is one of the most serious concerns in plant biology with diverse implications at all the levels of molecular, biochemical, and physiological phenomena of plant growth, development, and consequently the productivity. Most of the strategies to induce or enhance drought tolerance in plants are unreasonably expensive and/or time-consuming. Some studies conducted in the recent past have shown that plant growth regulators (PGRs) may induce/improve physiological tolerance in plants to cope with adverse environmental conditions including drought. The present study was aimed at investigating the effects of foliar spray of GABA (0, 1, 2, and 4 mM) applied 20 days following the germination of seeds, on vegetative growth, morphological characteristics, integrity of cell-membrane, and the levels of photosynthetic pigments and enzymatic antioxidants in carrot cvs. Supertaj and Bharat, grown under 100% and 50% field capacity of soil moisture. The treated and untreated (control) carrot plants were harvested and analyzed 2 weeks following the GABA application. The results revealed that foliar application of GABA improved the vegetative growth and significantly increased the levels of free amino acids, plastid pigments, enzymatic antioxidants, and the relative water content in the root crop grown under 50% field capacity of soil moisture, compared to control. Additionally, the GABA application decreased the electrolyte leakage of ions and melondialdehyde (MDA) content in carrot leaves. The carrots harvested from GABA-treated or untreated (control) plants were not significantly different for their protein contents. In conclusion, the incorporation of GABA in the production management of carrots may help plants to mitigate the adverse effects of water deficit stress.

scholarly journals Gibberellin and cytokinin effects on soybean growth

2003 ◽  
Vol 60 (3) ◽  
pp. 537-541 ◽  
Author(s):  
Vagner Maximino Leite ◽  
Ciro Antonio Rosolem ◽  
João Domingos Rodrigues
Keyword(s):  
Plant Growth ◽  
Root Growth ◽  
Leaf Area ◽  
Vegetative Growth ◽  
Seed Treatment ◽  
Dry Matter ◽  
Foliar Application ◽  
Foliar Spray ◽  
Stem Diameter ◽  
Joint Application

Soybean is an important crop in Brazil. Nonetheless, there are no reports on the use of plant growth regulator potential in relation to this crop in the national literature. To better understand the role of these compounds, a pot experiment was carried out to study effects of GA3 and cytokinin on the vegetative growth of the soybean. GA3 (50 mg L-1) was applied as seed treatment, leaving plants with water application as control. GA3 (100 mg L-1) and cytokinin (30 mg L-1) were sprayed on leaves at the physiological stage V3/V4, and 15 days after, cytokinin (30 mg L-1), also as foliar spray. Seed treatment decreased plant emergence and initial soybean root growth, but as the season progressed, differences in root growth disappeared; plants were shorter, and presented a decrease in the number of nodes, in stem diameter, in leaf area and in dry matter yield. Conversely, foliar application of GA3 led to an increase in plant height, first node height and stem diameter. Leaf area and dry matter production also increased as a result of GA3 foliar application. There was no effect of exogenous gibberellin and cytokinin on the number of soybean leaves, number of stem branches and root dry matter. Joint application of gibberellin and cytokinin tended to inhibit gibberellin effects. Cytokinin applied to leaves during soybean vegetative growth was not effective in modifying any of the evaluated plant growth variables.

scholarly journals Foliar Applications of Plant Growth Regulators Affect Stem Elongation and Branching of 11 Kalanchoe Species

2012 ◽  
Vol 22 (3) ◽  
pp. 338-344 ◽  
Author(s):  
Christopher J. Currey ◽  
John E. Erwin
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Stem Elongation ◽  
Foliar Spray ◽  
Stem Length ◽  
Chlormequat Chloride ◽  
Branch Number ◽  
Time Of Application ◽  
Number Of Branches

Our objectives were to assess the efficacy of various plant growth regulators (PGRs) on stem elongation and branching of 11 kalanchoe (Kalanchoe) species with ornamental characteristics: beauvard’s widow’s-thrill (K. beauvardii), K. glaucescens, lavender scallops or red-leaved kalanchoe (K. fedtschenkoi), K. longiflora, chandelier plant (K. manginii), marnier’s kalanchoe (K. marnieriana), K. millotii, flower dust plant (K. pumila), K. rosei, common kalanchoe or nentabos (K. rotundifolia), and K. streptantha. Foliar spray applications of deionized water, ancymidol (15−60 ppm), benzyladenine (75−300 ppm), chlormequat chloride (750−3000 ppm), daminozide (1250−5000 ppm), ethephon (250−1000 ppm), paclobutrazol (10−40 ppm), or uniconazole (5−20 ppm) were applied 2 weeks after plants were pinched. Stem length at the time of application and 4 weeks after applications and branch number were recorded. While effective chemicals and concentrations varied widely among species, paclobutrazol and uniconazole were identified as providing broad efficacy with respect to inhibition of stem elongation across all 11 species in this study. Additionally, benzyladenine and ethephon increased the number of branches for several species.

scholarly journals Control of Salpiglossis sinuata Height with Plant Growth Regulators

HortScience ◽  
1990 ◽  
Vol 25 (4) ◽  
pp. 441-443
Author(s):  
Douglas C Needham ◽  
P. Allen Hammer
Keyword(s):  
Plant Growth ◽  
Plant Height ◽  
Growth Regulators ◽  
Vegetative Growth ◽  
Growth Retardants ◽  
Chlormequat Chloride ◽  
Potted Plant ◽  
Butanedioic Acid ◽  
Line P ◽  
Corolla Diameter

Salpiglossis sinuata R. et P., a floriferous member of the Solanaceae, was studied for potential as a flowering potted plant when modified by growth retardants. Seedlings of an inbred line P-5 were covered with black cloth for an 8-hour photoperiod to permit vegetative growth to ≈16 -cm-diameter rosettes. Plants were then exposed to an 18-hour photoperiod for the duration of study. Flowering occurred 40 days after the plants were transferred to long days. Neither spray applications of uniconazole at 10, 20, 40, or 100 ppm, nor chlormequat chloride at 750, 1500, or 3000 ppm significantly retarded plant height. Applications of daminozide, ranging in concentration from 1000 to 5000 ppm, alone and in combination with chlormequat chloride, were effective at retarding plant height; however, concomitant restriction of corolla diameter was frequently observed. Chemical names used: 2-chloro- N,N,N -trimethylethanaminium chloride (chlormequat chloride); butanedioic acid mono(2,2-dimethylhydrazide) (daminozide); and (E) -1-(p-chlorophenyl)-4,4-dimethyl-2-(1,2,4-triazol-1-yl) -1-penten-3-01 (uniconazole).

scholarly journals Exogenous application of growth stimulators improves the condition of maize exposed to soil drought

2021 ◽  
Vol 43 (4) ◽  
Author(s):  
Agnieszka Ostrowska ◽  
Maciej T. Grzesiak ◽  
Tomasz Hura
Keyword(s):  
Plant Growth ◽  
Developmental Stages ◽  
Aminolevulinic Acid ◽  
Stem Elongation ◽  
Development Stage ◽  
Photochemical Activity ◽  
Soil Drought ◽  
Beneficial Effects ◽  
Induced Changes ◽  
The Impact

AbstractSoil drought is a major problem in plant cultivation. This is particularly true for thermophilic plants, such as maize, which grow in areas often affected by precipitation shortage. The problem may be alleviated using plant growth and development stimulators. Therefore, the aim of the study was to analyze the effects of 5-aminolevulinic acid (5-ALA), zearalenone (ZEN), triacontanol (TRIA) and silicon (Si) on water management and photosynthetic activity of maize under soil drought. The experiments covered three developmental stages: three leaves, stem elongation and heading. The impact of these substances applied during drought stress depended on the plant development stage. 5-ALA affected chlorophyll levels, gas exchange and photochemical activity of PSII. Similar effects were observed for ZEN, which additionally induced stem elongation and limited dehydration. Beneficial effects of TRIA were visible at the stage of three leaves and involved leaf hydration and plant growth. A silicon preparation applied at the same developmental stage triggered similar effects and additionally induced changes in chlorophyll levels. All the stimulators significantly affected transpiration intensity at the heading stage.

scholarly journals Yield and vegetative growth of cactus pear at different spacings and under chemical fertilizations

2016 ◽  
Vol 20 (6) ◽  
pp. 564-569 ◽  
Author(s):  
João A. da Silva ◽  
Sérgio L. R. Donato ◽  
Paulo E. R. Donato ◽  
Evilasio dos S. Souza ◽  
Milton C. Padilha Júnior ◽  
...  
Keyword(s):  
Plant Growth ◽  
Plant Height ◽  
Vegetative Growth ◽  
Dry Matter ◽  
Block Design ◽  
Plant Age ◽  
Cactus Pear ◽  
Area Index ◽  
Randomized Block Design

ABSTRACT The objective was to evaluate the effect of different spacings and mineral fertilizations on cactus pear growth and production in a randomized block design, with three replicates, in a 3 x 4 factorial scheme: three spacings, 1.00 x 0.50 m, 2.00 x 0.25 m and 3.00 x 1.00 x 0.25 m, and four fertilizations, 000-000-000, 000-150-000, 200-150-000 and 200-150-100 kg ha-1 of N, P2O5 and K2O, respectively. Plant growth was evaluated between 90 and 390 days and production and growth were evaluated at 620 days after planting. There were significant interactions between spacing and fertilization for plant height, number of cladodes and cladode area index from 90 to 390 days and for production of fresh and dry matter at 620 days after planting. Spacing influenced cladode area index, while fertilization influenced plant height, number of cladodes and cladode area index at 620 days after planting. Plant height showed cubic effect for the days after planting. Number of cladodes and cladode area index were dependent on spacing, fertilization and plant age, and fitted to cubic models. The best results of growth and production of fresh and dry matter are associated with NPK and NP fertilizations and the spacing of 1.00 x 0.50 m.

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