Chlorobenzoyl Chloride and Methyl Chlorobenzoate as Synthetic Plant Growth Regulators

Weed Science ◽  
1975 ◽  
Vol 23 (5) ◽  
pp. 428-432
Author(s):  
T. J. Allen ◽  
C. L. Leinweber ◽  
D. K. Prince ◽  
D. F. Bouchard
Keyword(s):  
Aqueous Solution ◽  
Plant Growth ◽  
Sorghum Bicolor ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Gaseous Phase ◽  
Foliar Application ◽  
Soybean Seed ◽  
Dry Weight ◽  
Soybean Seedlings

CBC (2,5-dichlorobenzoyl chloride) and MCB (methyl-2,5-dichlorobenzoate) function as plant growth regulators in a gaseous phase or in an aqueous solution. Sorghum [Sorghum bicolor (L.) Moench. ‘Martin’] and soybean [Glycine bicolor (L.) Merr. ‘Lee’] seeds were temporarily inhibited or delayed from germinating, but overcame the inhibition in time so there was no significant reduction in total germination. Seedlings produced from sorghum and soybean seed germinated and grown in aqueous solution of 35 μg/ml CBC or MCB were shorter and weighed less than control seedlings. Soybean seed treated with the vapors of CBC and MCB produced seedlings significantly reduced in dry weight as compared with that of controls. Foliar application of 500 or 1000 μg/ml of CBC significantly reduced the growth of soybean but not sorghum seedlings. Soybean seedlings treated with the vapors or an aqueous solution produced leaflets more narrow and thicker than control seedlings. A lethal response attributable to CBC or MCB was not recorded.

scholarly journals Effect of Foliar Application of Plant Growth Regulators on Vegetative Growth of Medicinal Plant Simarouba glauca DC

2019 ◽  
pp. 128-133
Author(s):  
Patil Manasi S. ◽  
Gaikwad D. K.
Keyword(s):  
Plant Growth ◽  
Leaf Area ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Vegetative Growth ◽  
Foliar Application ◽  
Dry Weight ◽  
Number Of Leaves ◽  
Pharmaceutical Industries ◽  
Simarouba Glauca

Field experiment was carried out to investigate effect of foliar application of Plant Growth Regulators (PGRs) like 6-benzylaminopurine (6-BA), gibberellic acid (GA), chlormequat(CCC), salicylic acid (SA), cysteine and methionine with 5 and 20 ppm concentration on vegetative growth of Simarouba glauca DC. Foliar application of both concentrations of all the PGRs promoted root length, shoot length, height of plant, number of leaves per plant, leaf area, fresh and dry weight of leaf, stem, root and fresh and dry weight per plant. The significant increase in plant height, leaf area and dry weight were obtained in plants treated with GA, SA and methionine while 5ppm GA gave highest number of leaves per plant. This will improve the availability of plant biomass for extraction of various bio active molecules in pharmaceutical industries.

Impact of Exogenous Plant Growth Regulators on Physiological Traits, Tendril and Flowering in Horsegram (Macrotyloma uniflorum Lam) under Kharif Season 

2021 ◽  
Author(s):  
R. Sivakumar
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Foliar Application ◽  
Leaf Temperature ◽  
Physiological Traits ◽  
Mepiquat Chloride ◽  
Kharif Season ◽  
Significant Difference ◽  
The Impact

Background: Horsegram is an important pulse crop grown as Rabi crop in Tamil Nadu. Kharif sown crop could not flowers may be because of more number of tendrils produced as compare to Rabi sown crop. Hence, an attempt was made to reduce the number of tendrils and induce flowering in horsegram during Kharif season by plant growth regulators. Methods: A field experiment was conducted to study the impact of plant growth regulators viz., salicylic acid (100 ppm), chlormequat chloride (CCC - 250 ppm), mepiquat chloride (250 ppm), tri iodo benzoic acid (TIBA - 200 ppm) and nitrobenzene (0.2%) on physiological traits and tendril growth associated with flowering in horsegram during Kharif. Different treatments were applied through foliar application at 25 Days after sowing. Result: Among the PGRs, foliar application of TIBA registered the lowest number of tendrils (2.3) followed by CCC (3.0) compared to other treatments. Higher root length of 16.8 cm and RWC of 82.3% was found in CCC treatment. CCC also registered the highest photosynthetic rate (27.15 µmol m-2 s-1), transpiration rate (18.06 mmol m-2 s-1) and lowest leaf temperature (26°C) compared to other treatments. The highest soluble protein content of 13.1 mg g-1 was also estimated in CCC treatment followed by mepiquat chloride (12.51 mg g-1). Sucrose phosphate synthase (SPS) activity did not show any significant difference between the treatments. Number of flowers buds formed per plant was zero and hence the flowering did not take place in any treatments. Among the plant growth regulators used, TIBA and CCC registered its positive action on reduced the number of tendrils and leaf temperature, but not enough to induce flowering under Kharif season.

scholarly journals Plant Growth Regulator Impacts on Vegetative Cutting Production of Moroccan Pincushion (Pterocephalus depressus) Plants

2021 ◽  
Vol 39 (2) ◽  
pp. 62-67
Author(s):  
Sean J. Markovic ◽  
James E. Klett
Keyword(s):  
Plant Growth ◽  
Gibberellic Acid ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Growth Index ◽  
Dry Weight ◽  
Stock Plant ◽  
Cutting Production

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).

scholarly journals Susceptibility in the Growth of Viola tricolor `Blue' to Plant Growth Regulators and Fish Emulsion

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 852D-852
Author(s):  
Sabrina L. Shaw ◽  
William F. Hayslett ◽  
Eddie B. Williams
Keyword(s):  
Plant Growth ◽  
Plant Height ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Dry Weight ◽  
Fresh Weight ◽  
Visual Appearance ◽  
Top Dry Weight ◽  
Viola Tricolor

A one-time application of fish emulsion 2 days before the application of plant growth regulators (PGR) showed an overriding effect on the growth of pansies. Blue/blotch shades of `Medallion' pansies were placed on a constant feed program of 100 ppm Peat Lite 20N–10P–20K, with half of the pansies receiving an additional one-time supplement of fish emulsion. PGRs and rates included B-Nine, 0.5% (used as the control); uniconazole, 2 and 4 ppm; and paclobutrazol, 16 and 25 ppm. Parameters taken included plant height, top fresh weight, top dry weight, days to anthesis, and visual appearance. Significant differences were noted in the plants receiving the supplement for plant dry weight, plant height, and visual appearance. Plants receiving fish emulsion grew taller and denser than those on constant feed alone despite the effects of the PGRs.

scholarly journals Effects of Pinching, Number of Cuttings per Pot, and Plant Growth Regulators on Height Control of Purple Firespike

2015 ◽  
Vol 25 (1) ◽  
pp. 71-75 ◽  
Author(s):  
Amir Rezazadeh ◽  
Richard L. Harkess
Keyword(s):  
Plant Growth ◽  
Leaf Area ◽  
Plant Height ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Stem Elongation ◽  
Dry Weight ◽  
Maximum Height ◽  
Height Control ◽  
Leaf Dry Weight

Purple firespike (Odontonema callistachyum), native to Central America, has potential for use as a new flowering potted plant. The effects of number of pinches (zero, one, or two) and number of cuttings (one, two, or three) per 6-inch pot were evaluated on the control of plant height. Plant height was suppressed as the pinch number increased. The greatest reduction was recorded with one cutting per pot and two pinches. The maximum number of branches per pot was recorded with two pinches and three cuttings per pot. In a second experiment, plant growth regulators (PGR) were also tested for efficacy of height control; 2 weeks after pinching, foliar sprays of paclobutrazol, flurprimidol, daminozide, chlormequat, and a tank-mix of daminozide + chlormequat or media drenches of paclobutrazol, uniconazole, or flurprimidol were applied. Plant height, leaf area, and leaf dry weight were recorded at 3, 6, and 9 weeks after PGR application. Maximum height control was obtained with uniconazole drench at 8 ppm, resulting in plants 22 cm tall, 61% shorter than the untreated control (56 cm); however, it resulted in severe leaf distortion. Plant height was 56% and 46% shorter than the control using drenches of paclobutrazol at 30 ppm and flurprimidol at 15 ppm, respectively. Daminozide spray at 2000 ppm and tank-mix of daminozide + chlormequat at 4500/1500 ppm suppressed stem elongation by 20.3% and 19%, respectively. Plants treated with paclobutrazol drench at 30 ppm reduced leaf area and leaf dry weight compared with other PGRs. Chlormequat spray at tested concentrations was ineffective for controlling firespike plant growth. The most attractive potted plants were produced using a drench application of paclobutrazol at 10 or 15 ppm.

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