Multiple applications of mepiquat chloride enhanced development of plant‐wide fruits from square initiation to boll opening in cotton

Crop Science ◽  
2021 ◽  
Author(s):  
Baopeng Liao ◽  
Xiaoming Ren ◽  
Mingwei Du ◽  
A. Egrinya Eneji ◽  
Xiaoli Tian ◽  
...  
Keyword(s):  
Mepiquat Chloride

Source-sink optimization and morpho-physiological response of soybean [Glycine max] to detopping and mepiquat chloride application

2018 ◽  
Author(s):  
Manpreet Jaidka ◽  
J.S. Deol ◽  
Ramanjit Kaur ◽  
R. Sikka
Keyword(s):  
Seed Yield ◽  
Seed Weight ◽  
Dry Matter ◽  
Dry Matter Accumulation ◽  
Mepiquat Chloride ◽  
Area Index ◽  
Stover Yield ◽  
Source Sink ◽  
Pod Length ◽  
100 Seed Weight

Effect of detopping and mepiquat chloride on morphological, physiological and yield attributes of soybean cultivar ‘SL 544’ was studied. A two year investigation was conducted at Punjab Agricultural University, Ludhiana, during kharif seasons of 2014 and 2015. The experiment was laid-out in randomized complete block design (RCBD) with eight treatments viz. control, detopping (removal of 4-5 cm apical portion of main stem) at 50-55 days after sowing (DAS), mepiquat chloride @ 200 ppm (50-55 DAS), mepiquat chloride @ 200 ppm (50-55 + 65-70 DAS), mepiquat chloride 250 ppm (50-55 DAS), mepiquat chloride @ 250 ppm (50-55 + 65-70 DAS), mepiquat chloride @ 300 ppm (50-55 DAS) and mepiquat chloride @ 300 ppm (50-55 + 65-70 DAS) with four replications. Detopping had a non-significant effect on leaf area index, SPAD value, PAR interception, abscission of reproductive parts, seeds per pod, 100-seed weight, pod length and stover yield of soybean. It significantly decreased plant height, increased total dry matter accumulation/plant, number of flowers and pods/plant, pod setting percentage and seed yield over control during 2014 and 2015. At crop harvest, detopping developed optimized source-sink relationship by means of distribution of total dry matter between stem, foliage and pods by 20.4, 14.9 and 64.6 % during 2014 while 22.6, 20.1 and 57.4 % during 2015, respectively. Mepiquat chloride posed a non-significant effect on plant height, PAR interception, number of flowers/plant, number of seeds/pod, pod length and stover yield of soybean but it significantly decreased leaf area index, abscission of reproductive parts while increased the dry matter accumulation/plant, number of pods/plant, 100-seed weight and seed yield relative to control. At harvest, two foliar applications of mepiquat chloride @ 250 ppm resulted in optimized source-sink relationship by the distribution of total dry matter among stem, foliage and pods by 20.6, 10.9 and 68.5 % during 2014 while 19.5, 7.6 and 72.9 % during 2015, respectively. Occurrence of more rainfall during 2015 as compared to 2014 caused mepiquat chloride to hike seed yield as compared to detopping which is clearly witnessed by increase in pod dry weight per plant during 2015 than 2014. Conclusively, both detopping and mepiquat chloride resulted in enhancement in source-sink relationship and seed yield of soybean.

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.

Mepiquat Chloride

1996 ◽  
pp. 501
Author(s):  
Thomas A. Unger
Keyword(s):  
Mepiquat Chloride

Nitrogen and Mepiquat Chloride Effects on the Production of Nonrank, Irrigated, Short-Season Cotton

jpa ◽  
1994 ◽  
Vol 7 (1) ◽  
pp. 70-75 ◽  
Author(s):  
R. K. Boman ◽  
R. L. Westerman
Keyword(s):  
Mepiquat Chloride ◽  
Short Season

Effect of Bensulfuron-Methyl on Cotton (Gossypium hirsutumL.) Growth and Development

1996 ◽  
Vol 10 (4) ◽  
pp. 851-855
Author(s):  
C. Dale Monks ◽  
Michael G. Patterson ◽  
Malcolm Pegues
Keyword(s):  
Methyl Ester ◽  
Plant Growth ◽  
Plant Height ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Growth And Development ◽  
Field Experiments ◽  
Mepiquat Chloride ◽  
Boll Rot ◽  
Effect On Yield

Field experiments were conducted in Alabama from 1992 through 1994 to evaluate the potential of the methyl ester of bensulfuron applied at sublethal rates as a plant growth regulator for reducing plant height and boll rot in cotton. Bensulfuron at 0.017 and 0.034 g ai/ha or mepiquat chloride at 10 g ai/ha was applied POST alone at the pinhead square or early-bloom stage of cotton growth or sequentially at 0.017 followed by (fb) 0.017 g/ha, 0.034 fb 0.034 g/ha of bensulfuron and 5 fb 5, 10 fb 10, 10 fb 20, or 20 fb 20 g/ha of mepiquat chloride. Mepiquat chloride had no effect on yield in 1992 and 1994 but decreased yield when applied sequentially in 1993. Bensulfuron was generally detrimental to first position fruit retention, and it delayed maturity. Treatments that reduced plant height did not reduce boll rot. Bensulfuron treatments that reduced plant height also reduced yield; therefore, the potential for its use as a growth regulator in cotton appears limited.

Temperature and Mepiquat Chloride Effects on Cotton Canopy Architecture

1990 ◽  
Vol 82 (2) ◽  
pp. 190-195 ◽  
Author(s):  
V. R. Reddy ◽  
D. N. Baker ◽  
H. F. Hodges
Keyword(s):  
Canopy Architecture ◽  
Mepiquat Chloride

Morpho-physiological Effects and Molecular Mode of Action of Mepiquat Chloride Application in Cotton: A Review

2020 ◽  
Vol 20 (4) ◽  
pp. 2073-2086
Author(s):  
Shahbaz Atta Tung ◽  
Ying Huang ◽  
Abdul Hafeez ◽  
Saif Ali ◽  
Anda Liu ◽  
...  
Keyword(s):  
Mode Of Action ◽  
Physiological Effects ◽  
Mepiquat Chloride ◽  
Molecular Mode

Cotton Fruiting Modification with Mepiquat Chloride 1

1986 ◽  
Vol 78 (5) ◽  
pp. 907-913 ◽  
Author(s):  
T. A. Kerby ◽  
Kater Hake ◽  
Mark Keeley
Keyword(s):  
Mepiquat Chloride

Mepiquat Chloride and Irrigation versus Cotton Growth and Development

1992 ◽  
Vol 84 (6) ◽  
pp. 930-933 ◽  
Author(s):  
V. R. Reddy ◽  
A. Trent ◽  
B. Acock
Keyword(s):  
Growth And Development ◽  
Mepiquat Chloride
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