scholarly journals The effect of growth regulators on sex expression in melon (Cucumis melo L.)

2013 ◽  
Vol 13 (3) ◽  
pp. 165-171 ◽  
Author(s):  
Zdenka Girek ◽  
Slaven Prodanovic ◽  
Jasmina Zdravkovic ◽  
Tomislav Zivanovic ◽  
Milan Ugrinovic ◽  
...  
Keyword(s):  
Gibberellic Acid ◽  
Growth Regulators ◽  
Cucumis Melo ◽  
Staminate Flower ◽  
Sex Expression ◽  
Male Flowers ◽  
Cucumis Melo L ◽  
Perfect Flower

Seven traits related to flowering and sex expression in melon were studied and their reaction to application of two growth regulators (ethrel and gibberellic acid) was observed. Four monoecious genotypes (Sesame, ED-3, ED-4, Pobeditel) and four andromonoecious genotypes (Chinese muskmelon, Anannas, Fiata, A2-3lb) had been used for experiments. According to the results, ethrel had higher effects on the investigated traits than gibberellic acid. Ethrel increased the number of perfect flowers per plant for 7.18 (31.42%), reduced the number of male flowers per plant for 21.47 (17.98%), affected earlier appearance of the first pistillate/perfect flower for 3.68 days, and delayed the appearance of the first staminate flower for 16.07 days. Changes in the last two traits caused an extension of the period from the emergence of the first pistillate/perfect to the first staminate flower from 0.1 to 21.57 days, which represents the strongest effect of ethrel. Gibberellic acid had generally opposite effects on the studied traits.

scholarly journals Effect of foliar spray of GA3 and NAA on sex expression and yield of bitter gourd

2019 ◽  
Vol 44 (2) ◽  
pp. 281-290
Author(s):  
R Khatoon ◽  
M Moniruzzaman ◽  
M Moniruzzaman
Keyword(s):  
Gibberellic Acid ◽  
Block Design ◽  
Foliar Spray ◽  
Sex Expression ◽  
Fruit Weight ◽  
Fruit Yield ◽  
Bitter Gourd ◽  
Yield Attributes ◽  
Randomized Complete Block Design ◽  
Male Flowers

A field experiment was conducted at the Plant Physiology field of Horticulture Research Center, BARI, Gazipur during two consecutive years of kharif 2014 and 2015 to assess the effect of GA3 and NAA on sex expression, yield and yield components of bitter gourd (Momordica charantia L.) var. BARI Karola-1. Eeleven treatments comprising five concentrations each of gibberellic acid (50, 100, 150, 200 and 300 ppm) and naphthalene acidic acid (50, 100, 150, 200 and 300 ppm) along with distilled water considered as control were evaluated in randomized complete block design with three replications. Gibberellic acid (GA3) and Naphthalene acidic acid (NAA) were sprayed at 4 leaf stage; second spray was done at 35-38 DAS and third spray done at flowering stage. All the treatments improved the flowering and yield characters over control. Foliar spray of NAA @ 150 ppm and 200 ppm was found better in terms of sex expression, yield and yield attributes of bitter gourd as compared to control and other treatments. Spray of NAA @ 150 ppm gave the lowest number of male flowers and the highest number of female flowers thereby produced the lowest sex ratio (male:female). Number of fruits/plant, individual fruit weight and fruit yield/plant were also found maximum from NAA 150 ppm. Maximum fruit yield was recorded with the application of NAA @ 150 ppm. Spraying of NAA @ 150 ppm gave the maximum gross return and net return with the highest BCR of 3.17. Bangladesh J. Agril. Res. 44(2): 281-290, June 2019

Pengaruh Beberapa Konsentrasi Hyrasil Terhadap Pembungaan Tanaman Melon (Cucumis melo L.)

Agrotek ◽  
2018 ◽  
Vol 3 (2) ◽  
Author(s):  
Liz Yanti Andriyani
Keyword(s):  
Experimental Design ◽  
Sea Level ◽  
Cucumis Melo ◽  
Block Design ◽  
The Other ◽  
Experimental Station ◽  
Randomized Complete Block Design ◽  
Male Flowers ◽  
Cucumis Melo L ◽  
Female Flowers

<em>The objective of the experiment was to observe the best Hydrasil� concentration to the flowering of �melon� to increase the yield of melon </em>(<em>Cucumis melo</em> L.)<em> . The experiment was conducted at Jambi University experimental station, which is located in an altitude of ��35 m above the sea level.� The experimental� design was randomized complete block design with 4 replications and 6 treatment levels of Hydrasil concentration, ie. : H<sub>0 =� </sub>none� Hydrasil treatment, H<sub>1 =� </sub>100 ppm� Hydrasil, H<sub>2 =� </sub>200 ppm�� Hydrasil, H<sub>3 =� </sub>300 ppm� Hydrasil, H<sub>4 =� </sub>400 ppm� Hydrasil, H<sub>5 =� </sub>500 ppm� Hydrasil. The results� showed that Hydrasil concentration� significantly affected number of female �flowers and number of male� flowers per plant. �Hydrasil concentration at� 200 ppm�� gave �more� number of female �flowers �per plant and� less �number of male �flowers per plant than the other treatments.</em>

scholarly journals The effect of ethepon treatment on the formation of flower in melon (Cucumis melo L.)

2018 ◽  
Vol 1 ◽  
pp. 00002
Author(s):  
Budi Setiadi Daryono ◽  
Eko Prasetya ◽  
Sumarlina Sumarlina ◽  
Dian Sartika ◽  
Aprilia Sufi Subiastuti
Keyword(s):  
Sex Expression ◽  
Fruit Production ◽  
Hermaphrodite Flower ◽  
Significance Level ◽  
Randomized Design ◽  
Plant Chemical ◽  
Monoecious Plant ◽  
Male Flowers ◽  
Cucumis Melo L

<p class="Abstract">Melon is a potential horticultural crop which the production is increased significantly each year in Indonesia. However, a melon plant that has been widely developed in Indonesia faced a problem due to the high tropical temperature that affected the fall of flower causing failure in fruit production. In addition, the variation of sex expression in melon flower is important for genetic analysis and breeding programs. Ethepon is one of plant chemical growth regulator that is known to change the sex expression of the plant by increasing the number of female flower in monoecious plant especially Cucurbitaceae. This research aimed to analyze the effect of ethepon treatment on the sex determination of melon flower. This study was conducted by 3 stages treatment of ethepon during March – July 2014, namely when 2, 5, and 7 weeks after planting. Split-plot design has been used with the main plots were arranged in a completely randomized design by cultivating different melon cultivars i.e: Melodi Gama 1, Melodi Gama 3, Bartek, and PI 371795. The data were analyzed by F-test and Duncan Multiple Range Test (DMRT) with significance level at 5 % using software SAS 9.3. The result showed that ethepon treatment affected the formation of melon flower by increasing the number of female or hermaphrodite flower and decreasing the number of male flowers, especially in the concentration of 75 ppm and 100 ppm but with different responses by different cultivar.&nbsp;<o:p></o:p></p>

scholarly journals Light Quality Effects on Flower Sex Expression in Cucumber and Spinach

HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 464D-464 ◽  
Author(s):  
Gary R. Bachman ◽  
Margaret J. McMahon
Keyword(s):  
Growth Regulators ◽  
Light Quality ◽  
Red Light ◽  
Female Flower ◽  
Sex Expression ◽  
Internode Elongation ◽  
Dioecious Species ◽  
Spectral Filters ◽  
Male Flowers

Using spectral filters to reduce the amount of far-red (FR) light perceived by plants has been shown to effectively reduce internode elongation of many floriculture crops. It is theorized that gibberellin (GA) function is inhibited in some way by the increase in the red: far-red light ratio. Sex expression of flowers are effected by exogenous applications of gibberellin and cause a shift in flower sex expression towards maleness. The use of growth regulators (GA inhibitors) have demonstrated a shift towards femaleness. Flowering of spinach, a dioecious species, and cucumber (staminate and pistillate lines), a monoecious species, were surveyed for shifts in flower sex expression, indicating a suppression of GA. Male: female flower ratio decreased from 7.6:1 to 4.06:1 when comparing the controls and –FR for the staminate cucumber line and 1:13 to 1:40 for the gynecious cucumber line. The decrease in male flowers on plants grown in a –FR environment are an indication that the function of GA is inhibited. There was no significant effect on the male: female flower ratios of the spinach.

scholarly journals Evaluasi Deskriptif Umur Panen Melon (Cucumis melo, L) Di Pekanbaru

2018 ◽  
Vol 14 (1) ◽  
pp. 65-71
Author(s):  
Surtinah Surtinah
Keyword(s):  
Organic Matter ◽  
Water Stress ◽  
Growth Regulators ◽  
Cucumis Melo ◽  
Research Method ◽  
Stress Condition ◽  
Environmental Modification ◽  
Water Stress Condition ◽  
Cucumis Melo L ◽  
Descriptive Qualitative

The objective of the study was to examine the factors that caused melon harvesting age in Pekanbaru faster than in the melon-producing regions. The research method used is descriptive qualitative. The results of the discussion found that the factors that influence the harvesting age of melon in Pekanbaru City are the water stress condition, the unfulfilled essential ingredients, the insufficient planting medium of organic matter, the importance of growth regulators that can enlarge the fruit and maintain the age of the plant, environmental modification.

scholarly journals EFFECT OF ETHEPHON AND GA3 ON SEX EXPRESSION OF GYNOECIOUS CUCUMBERS (CUCUMIS SATIVUS L.).

HortScience ◽  
1991 ◽  
Vol 26 (6) ◽  
pp. 681A-681
Author(s):  
Hurriah H. AL-Juboory
Keyword(s):  
Gibberellic Acid ◽  
Cucumis Sativus ◽  
Phosphonic Acid ◽  
Growth Regulator ◽  
Developmental Stages ◽  
Sex Expression ◽  
Cucumis Sativus L ◽  
Male Flowers ◽  
Water Treatments ◽  
Female Flowers

Gibberellic acid (GA3) promoted maleness and 2-Chloroethyl phosphonic acid (ethephon) promoted femaleness in cucumber (Cucumis sativus L.) cv Regal 446 seedlings when treated with water, ethephon (250 or 350 ppm) or GA3 (1000 or 2000 ppm) at the l-, 2-, or 3-leaf stage. Seedlings treated with ethephon at all stages produced more female flowers than those with water or GA3 treatments. GA3-treated seedlings produced significantly more male flowers than water treatments, at all developmental stages. The differential response of cucumber seedlings treated at different stages indicated the importance of timing growth regulator applications.

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