Differential Response of Chemicals on Sex Modification of Three Genera of Cucurbits

Singh, Ravindra Kumar; Choudhury, B.

doi:10.17660/actahortic.1983.137.41

Cited by 4 publications

(4 citation statements)

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“…These seem to be a reasonable explanation for the early appearance of female flowers at lower node. Similar findings have been reported with CCC by Sharma et al (1988) and with MH by Singh and Choudhury (1988), Patel (1992) and Pandya and Dixit (1997) in bottle gourd. The plants treated with MH @ 150 ppm were able to produce the first female flower in least number of days in both the years (70.0 in 2015, 74.3 in 2016 and mean value 72.15.…”

Section: Node Number and Number Of Days To First Male And Female Flowerssupporting

confidence: 89%

Influence of plant growth regulators on vegetative growth, sex expression and yield of summer bottle gourd

Moniruzzaman¹,

Khatoon²,

Qamruzzaman³

2020

Bangladesh J. Agric. Res

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Field experiments on bottle gourd variety ‘BARI Lau -4’ were conducted at the Plant Physiology field of Horticulture Research Center, Bangladesh Agricultural Research Institute, Gazipur during two consecutive summer seasons of 2015 and 2016 to investigate the effect of plant growth regulators on growth, sex expression, yield and yield components of the crop. The experiment consisted of different concentrations of Gibberellic acid (GA3), Naphthalene acetic acid (NAA), Maleic hydrazide (MH) and single concentration of cycocel (CCC) viz., GA3 @ 10 ppm, GA3 @ 30 ppm, NAA @100 ppm, NAA @ 150 ppm, MH @ 50 ppm, MH @ 150 ppm and CCC @ 500 ppm along with distilled water considered as control. All growth regulators were sprayed to the seedlings at two-leaf stage and 4 days after the first spray. Growth regulator treatments had significant effect on primary branches/plant, node number of 1st male and female flower appearance, number of days to 1st male and female flower appearance, number of male and female flowers, sex ratio (male:female flower) number of fruits/plant, individual fruit weight and fruit yield. Spraying of MH @ 150 ppm gave the highest primary branches/plant (17.0 and 18.0 in first and 2nd year, respectively) and induced maximum female flowers (37.3 and 40.0 in first and 2nd year, respectively) at lower nodes followed by CCC @ 500 ppm (36.3) in the first year and MH @ 50 ppm (40.0) in the 2nd year. Application of MH @ 150 ppm caused early appearance of female flowers on the nearest node (from bottom). Application of MH @ 150 ppm gave the lower number of male flowers (81.7 and 96.0 in first and 2nd year, respectively) and the highest number of female flowers/plant, thereby producing lower male:female sex ratio (2.2 and 2.5 in first and 2nd year, respectively) and the maximum number of fruits/plant (12.0 and 14.0 in first and 2nd year, respectively). The maximum fruit weight/plant was obtained from the application of MH @ 150 ppm (29.3 and 35.8 in first and 2nd year, respectively) followed by CCC @ 500 ppm (26.0 in the 1st year and 29.0 in 2nd year). The highest fruit yield per hectare was recorded significantly with the application of MH @ 150 ppm (97.6 t/ha and 89.6 t/ha in first and 2nd year, respectively) closely followed by CCC @ 500 ppm (88.5 t/ha in 2015) and GA3 @ 30 ppm (75.3 t/ha in 2016), as compared to other treatments. The highest mean yield over the years was also recorded at MH @ 150 ppm (93.6 t/ha) followed by CCC @ 150 ppm (80.6 t/ha) and GA3 30 (74.1). Application of MH @ 150 ppm gave the maximum gross return and net return with the highest BCR of 5.24 followed by CCC 500 ppm (4.15) and GA3 30 ppm (3.86). Bangladesh J. Agril. Res. 44(4): 577-590, December 2019

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Section: Node Number and Number Of Days To First Male And Female Flowerssupporting

confidence: 89%

Influence of plant growth regulators on vegetative growth, sex expression and yield of summer bottle gourd

Moniruzzaman¹,

Khatoon²,

Qamruzzaman³

2020

Bangladesh J. Agric. Res

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“…The average control yield was 0.69 kg plant (Arora et al, 1985). Singh and Choudhury (1988) stated that ethrel at 50 and 100 ppm induced the first pistillate flowers earlier and at lower nodes in cucumber and bottle gourd, but delayed the appearance of female flowers in water melon. Karim et al (1990) treated hybrid seedlings of cucumber with water, ethephon (250 and 350 ppm) at 1, 2, 3 and 4 leaf stage.…”

Section: Plant Growth Regulators On Growth Sex Expression and Fruit Yieldmentioning

confidence: 99%

Altered sex expression by plant growth regulators: An overview in medicinal vegetable bitter gourd (Momordica charantia L.)

Mia¹,

Islam²,

Shamsuddin³

2014

J. Med. Plants Res.

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Bitter gourd is one of the popular vegetables for its medicinal values. It is monoecious cucurbitaceous plants which have imbalance sex ratio of male-female flowers that causes lower fruit yield. Different research works on cucurbits like bitter gourd and other related crops in respect of plant growth regulators, plant nutrients, and priming practices have been conducted in different parts of the world. Literatures related to the present study have been reviewed and found that bitter gourd genotypes produced larger male-female ratio and the induction of male flower was earlier than that of female ones. Growth regulators have significant positive effect on yield and yield components. Application of gibberellic acid (GA 3 ) enhanced the length of main vine, but decreased the primary branches while ethylene producing chemicals Canadian Environmental Protection Act (CEPA) increased the number of primary branches per plant. Application of auxin like 1-naphthaleneacetic acid (NAA) at 50 and 100 ppm and CEPA at 150 ppm also proved to be effective in inducing earlier female flowers at lower node. Application of CEPA at 150 ppm and NAA at 50 ppm was found to be the best treatments for reducing sex ratio by increasing the female flowers by suppressing the male ones, and consequently induce higher yield.

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“…The mean data set over the years was subjected to diversity analysis using Mahalanobis D 2 Analysis (Mahalanobis, 1936) and clustering was done by Tocher's method following Rao (1952). Further, PCA was carried out following Singh and Choudhury (1988). Both the analysis was carried out using INDOSTAT software.…”

Section: Methodsmentioning

confidence: 99%

Genetic diversity analysis for physiological, reproductive, biochemical and yield traits of blackgram (Vigna mungo L.) genotypes under high temperature stress

2024

EJPB

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In the present study, 30 blackgram genotypes were evaluated for physiological, reproductive, biochemical and yield traits at flowering stage during summer, 2022 and 23. ANOVA showed highly significant genetic variability among the 30 blackgram genotypes for 20 heat tolerance traits studied indicating that significant amount of genetic variability among the genotypes. Higher PCV, GCV and heritability was recorded for seed yield per plant and number of pods per plant during both the years. Moreover, the results of cluster analysis for these heat tolerance traits revealed that the genotypes TBG-129, LBG-1015, PU-1804, TBG-104 and PU-31 were identified as promising genotypes under high temperature stress conditions during both the years. Principal component analysis showed that first three components showed 82.62 % of total variation during summer, 2022, whereas 77.06 % of the total variance was covered by the first two principal components during summer, 2023. The identification of genotypes displaying heat tolerance can be useful in future breeding programmes for the development of heat stress tolerant genotypes.

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Differential Response of Chemicals on Sex Modification of Three Genera of Cucurbits

Cited by 4 publications

References 0 publications

Influence of plant growth regulators on vegetative growth, sex expression and yield of summer bottle gourd

Influence of plant growth regulators on vegetative growth, sex expression and yield of summer bottle gourd

Altered sex expression by plant growth regulators: An overview in medicinal vegetable bitter gourd (Momordica charantia L.)

Genetic diversity analysis for physiological, reproductive, biochemical and yield traits of blackgram (Vigna mungo L.) genotypes under high temperature stress

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