scholarly journals PLANT HEIGHT CONTROL OF HYACINTHUS ORIENTALIS BY GIBBERELLIN INHIBITORS

AGROFOR ◽  
2021 ◽  
Vol 4 (2) ◽  
Author(s):  
Sevim DEMİR ◽  
Fisun Gürsel ÇELİKEL
Keyword(s):  
Chlorophyll Content ◽  
Plant Height ◽  
Unit Area ◽  
Leaf Length ◽  
Home Office ◽  
Height Control ◽  
Content Index ◽  
Flower Diameter ◽  
Hyacinthus Orientalis ◽  
Production Period

In this study, effect of gibberellin inhibtors as preplant bulb soaks on plant height of Hyacinthus orientalis cv. ‘Jan Bos’ grown in pots were investigated. Bulbs of hyacints were soaked in flurprimidol at 0, 10, 20 ppm and paclobutrazol at 0, 100, 200 ppm before planting. Effect of gibberellin inhibitors on the flowering time, flower diameter and length, leaf length, plant height, flower life, chlorophyll content of leaves were determined. In addition, after hyacints grown in pots in the greenhouse arrived at the sales stage to determine the changes that occur in the plant height, plants were taken to the laboratory where temperature was held constant at 20 °C. The shortest plant height was obtained from the 200 ppm paclobutrazol and 20 ppm flurprimidol treatment as given bulb soaks. In this treatments, plant heihgt was 7.33 and 8.61 cm and were 49% , 41% shorter than untreated control. The lower dose of 10 ppm flurprimidol and 100 ppm paclobutrazol were also effective on height control with 9.11 and 9.71 cm plant height, respectively. Gibberellin inhibitors also shortened leaf lenght. Flurprimidol and paclobutrazol treatments resulted in higher chlorophyll content per unit area in the leaves than untreated controls. The highest chlorophyll contetnt was obtained from the plants treated 200 ppm paclobutrazol with 83.36 CCI (Chlorophyll content index), while the control was 50.56 CCI. The effects of treatments on plant height were maintained in lab conditions (home-office). The shortest plant height was obtained from 200 paclobutrazol treatment with 9.75 cm, while the control was 21.5 cm during post production period.

scholarly journals A STUDY ON PLANT HEIGHT CONTROL OF IRIS FLOWERS

AGROFOR ◽  
2019 ◽  
Vol 3 (3) ◽  
Author(s):  
Sevim DEMİR ◽  
Fisun Gürsel ÇELİKEL
Keyword(s):  
Flowering Time ◽  
Chlorophyll Content ◽  
Plant Height ◽  
Untreated Control ◽  
Unit Area ◽  
Leaf Length ◽  
Height Control ◽  
Flower Diameter

We investigated the effect of paclobutrazol as preplant bulb soaks on plant heightof Iris x hollandica cv. ‘Frans Hals’ and ‘Blue Magic’cultivars which were grownin pots. Bulbs of iris were soaked into gibberellin inhibitor paclobutrazol solutionat 0, 15, 30 ppm before planting. Effect of paclobutrazol on the flowering time,flower diameter and length, leaf length, plant height, flower life, and chlorophyllcontent of leaves were determined. The shortest plant height was obtained from the‘Blue Magic’ cultivar treated with 30 ppm paclobutrazol which gave plants with11.3 cm, 68% shorter than untreated control. ‘Frans Hals’ cultivar treated with 30ppm paclobutrazol was 20.9 cm and 50% shorter than control. In ‘Blue Magic’ and‘Frans Hals’cultivars the lower dose of 15 ppm paclobutrazol were also effectiveon height control with 11.8 and 21.5 cm plant height, respectively. This gibberellininhibitor also shortened the leaf length of iris cultivars. Paclobutrazol treatmentsresulted in higher chlorophyll content per unit area in the leaves. The highestchlorophyll content (57.00 CCI) was obtained from the ‘Blue Magic’ iris treatedwith 30 ppm paclobutrazol, while the control plants had 32.70 CCI chlorophyll intheir leaves. Chlorophyll content of ‘Frans Hals’ treated with 30 ppm paclobutrazolwere 52.87 CCI, while control plants of this cultivar were 28.80 CCI. Plantsapplied with paclobutrazol resulted with smaller flower diameter compared to thecontrol plants of both cultivars. The smallest flower diameter was obtained from 30ppm paclobutrazol treatment with 38.83 mm in ‘Blue Magic’ iris while the controlof this cultivar was 99.63 mm. The flower diameter of ‘Frans Hals’ cultivar treatedwith 30 ppm paclobutrazol was 109.1 mm, while the control one was 112 mm.

scholarly journals Productivity of Selected African Leafy Vegetables under Varying Water Regimes

Agronomy ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 916
Author(s):  
Innocent Maseko ◽  
Bhekumthetho Ncube ◽  
Samson Tesfay ◽  
Melake Fessehazion ◽  
Albert Thembinkosi Modi ◽  
...  
Keyword(s):  
Water Stress ◽  
Chlorophyll Content ◽  
Plant Height ◽  
Dietary Diversity ◽  
Block Design ◽  
Leafy Vegetables ◽  
Leaf Number ◽  
Water Regimes ◽  
Content Index ◽  
African Leafy Vegetables

African leafy vegetables (ALVs) are nutrient dense and can contribute to crop and dietary diversity, especially in water-stressed environments. However, research on their productivity under limited water availability remains scant. The objective of the study was to evaluate growth, physiology and yield responses of three ALVs (Vigna unguiculata, Corchorus. Olitorius and Amaranthus cruentus) and a reference vegetable (Beta vulgaris var. cicla) to varying water regimes [30%, 60% and 100% of crop water requirement (ETc)]. Field trials using a randomised complete block design, replicated three times, were conducted over two summer seasons, 2015/16 and 2016/17. Leaf number, plant height, chlorophyll content index (CCI), chlorophyll fluorescence (CF), and yield were measured in situ. For A. cruentus and C. olitorius, water stress (30% ETc) was shown to produce a lower yield, although leaf number, plant height and chlorophyll content index were unaffected, while for B. vulgaris, leaf number and yield were reduced by water stress. For V. unguiculata, CF, CCI, plant height, leaf number, and yield were not affected by water stress, indicating its suitability for production in water scarce environments. Using 60% ETc was suitable for the production of A. cruentus, C. olitorius and B. vulgaris var. cicla, whereas 30% ETc is recommended for V. unguiculata. The yield results of V. unguiculata indicate that it performs better, while the yield of A. cruentus and C. olitorius is comparable to that of B. vulgaris under similar conditions, indicating potential for marginal production.

scholarly journals Line×tester analysis in lilium×formolongi: identification of superior parents for growth and flowering traits

2019 ◽  
Vol 17 (1) ◽  
pp. 175-187
Author(s):  
R Rai ◽  
J Shrestha ◽  
JH Kim
Keyword(s):  
Plant Height ◽  
Gene Action ◽  
Block Design ◽  
Leaf Length ◽  
Stem Diameter ◽  
Leaf Width ◽  
Days To Flowering ◽  
Flower Diameter ◽  
Number Of Leaves ◽  
Almost All

An experiment was carried out using eight double cross F1s (DCF1s) as lines and two testers to obtain sixteen Line ×Tester hybrids for the evaluation of major growth and flowering traits thereby to understand the breeding potentiality of the parental lines. The performance of growth and flowering traits of all twenty-six genotypes were evaluated in a randomized complete block design (RCBD) with three replications. The analysis of variance (ANOVA) showed all the genotypes were significantly different for all agro-morphological traits under study. The estimated general combining ability (GCA) effects showed that parent 5(P5), were superior for plant height, stem diameter, number of leaves, leaf length, days to flowering and attitude of floral axis followed by parent 2(P2) for leaf length, leaf width, days to flowering and attitude of floral axis and parent7 (P7) for number of flower, flower diameter, bud length and attitude for floral axis. Likewise; tester 1 found to be best combiner with significant GCA effect for almost all growth and flowering traits (except number of leaves). The plant height, leaf width, number of flower and attitude of floral axis showed prevailing additive gene action while stem diameter, number of leaves, leaf length, days to flowering, flower diameter and bud length indicated predominance of dominance gene action. We can conclude that parent P5, parent P2 and parent P7 can be used as good mother lines and the tester 1, as good donor for the seed production. SAARC J. Agri., 17(1): 175-187 (2019)

scholarly journals Comparison of Flurprimidol to Ethephon, Paclobutrazol, and Uniconazole for Hyacinth Height Control

2005 ◽  
Vol 15 (4) ◽  
pp. 872-874 ◽  
Author(s):  
Brian A. Krug ◽  
Brian E. Whipker ◽  
Ingram McCall ◽  
John M. Dole
Keyword(s):  
Plant Height ◽  
Untreated Control ◽  
Cost Effective ◽  
Height Control ◽  
Foliar Sprays ◽  
Cost Effective Method ◽  
Hyacinthus Orientalis

Preplant bulb soaks of flurprimidol, paclobutrazol, and uniconazole; foliar sprays of ethephon and flurprimidol; and substrate drenches of flurprimidol were compared for height control of `Anna Marie' hyacinths (Hyacinthus orientalis). Preplant bulb soak concentrations of flurprimidol and paclobutrazol were from 25 to 400 mg·L-1, and uniconazole from 5 to 80 mg·L-1. Height control was evaluated at anthesis and 11 days later under postharvest conditions. Ethephon (250 to 2000 mg·L-1) and flurprimidol (5 to 80 mg·L-1) foliar sprays were ineffective. Flurprimidol (0.25 to 4 mg/pot) drenches had no effect during forcing, but controlled postharvest height at concentrations ≥0.25 mg/pot a.i. with at least 4% shorter plants than the untreated control. Preplant bulb soaks resulted in height control with flurprimidol ≥25 mg·L-1, paclobutrazol ≥100 mg·L-1, and uniconazole ≥40 mg·L-1; having at least 9%, 6%, and 19%, respectively, shorter plants than the untreated control. Based on our results, flurprimidol preplant bulb soaks have a greater efficacy than either uniconazole or paclobutrazol. Preplant PGR soaks are a cost-effective method of controlling plant height of hyacinths because of the limited amount of chemical required to treat a large quantity of bulbs.

scholarly journals Tolerance of Hyacinth (Hyacinthus orientalis L. c.v. “Blue Star”) to Lead Contaminated Media

2020 ◽  
Vol 4 (1) ◽  
pp. 97-104
Author(s):  
Füsun GÜLSER ◽  
Arzu ÇIĞ
Keyword(s):  
Flowering Time ◽  
Leaf Length ◽  
Sand Mixture ◽  
Blue Star ◽  
Full Flowering ◽  
Randomized Experimental Design ◽  
Flower Diameter ◽  
Hyacinthus Orientalis ◽  
Accumulator Plant ◽  
Plant Length

The objective of this study was to determine the tolerance of hyacinth (Hyacinthus orientalis L. c.v. “Blue Star”) as a hyper accumulator plant to lead contaminated media. This research was carried out in a completely randomized experimental design with three replications in green house conditions. Four doses of lead (control, 20 mg kg-, 40 mg kg-1, 80 mg kg-1) were applied to each growing media having 500 g soil: sand mixture in 2:1 ratio.  The distillate water was used in irrigation and Hoagland solution was applied for fertilization. At the end of the experiment, effects of lead applications on all of plant growth criteria and flowering were found significant (P<0.01) except leaf number and stem diameter. The lowest first flowering time, full flowering time and first floret withering time were obtained as 77.00 day, 79.20 day and 82.39 day in control, respectively. The highest plant length and flower length were obtained as 229.91 mm and 146.36 mm in 20 mg Pb kg-1 application. The highest flower diameter and floret number were found as 63.03 mm and 42.42 in 40 mg Pb kg-1 application. Generally, while the lead doses increased flowering time, leaf length, plant length, flower length, flower diameter and floret number increased.

scholarly journals Efficacy of Paclobutrazol Drenches on Growth of Potted Sunflowers Grown in 16.5-cm Pots

HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 438C-438
Author(s):  
Shravan K. Dasoju ◽  
Brian E. Whipker
Keyword(s):  
Plant Growth ◽  
Helianthus Annuus ◽  
Plant Height ◽  
Untreated Control ◽  
Growth Retardant ◽  
Height Control ◽  
Pot Size ◽  
Optimum Height ◽  
Flower Diameter ◽  
Pot Plant

Drench applications of plant growth retardant paclobutrazol were applied at 2, 4, 8, 16, or 32 mg a.i./pot, plus an untreated control to pot sunflowers (Helianthus annuus cv. `Pacino') to determine its effect as a chemical height control. All paclobutrazol concentrations applied significantly reduced plant height by »27% when compared to the untreated control, but excessively short plants were observed at 16 and 32 mg a.i./pot. Plant diameter was also significantly decreased by »16% at 2 and 4 mg a.i./pot of paclobutrazol, when compared to the untreated control. Flower diameter decreased by »4% at 2 and 4 mg a.i./pot of paclobutrazol, but only concentrations ≥4 mg a.i./pot were significantly different from the untreated control. Paclobutrazol concentrations had no effect on days from potting to flowering. Drench concentrations of 2 and 4 mg a.i./pot of paclobutrozol produced optimum height control in relation to 16.5-cm-diameter pot size used.

Developmental changes in radish caused by brief end-of-day exposures to far-red radiation

1973 ◽  
Vol 51 (5) ◽  
pp. 1075-1077 ◽  
Author(s):  
J. T. A. Proctor
Keyword(s):  
Chlorophyll Content ◽  
Plant Height ◽  
Root Length ◽  
Leaf Length ◽  
Developmental Changes ◽  
Fresh Weight ◽  
Minute Exposure ◽  
Red Radiation

Five-minute exposure of radish plants to far-red radiation at the end of each day after the development of the first two leaves significantly increased plant height, leaf length and width, root length, fresh weight of leaves, and reduced the chlorophyll content of leaves.

scholarly journals Growth and yield of corn forage intercropped with marandu grass in an agrosilvopastoral system with eucalyptus

2017 ◽  
Vol 38 (6) ◽  
pp. 3669
Author(s):  
Miguel Sales Domingues ◽  
Cristiana Andrighetto ◽  
Gelci Carlos Lupatini ◽  
Gustavo Pavan Mateus ◽  
Aline Sampaio Aranha ◽  
...  
Keyword(s):  
Chlorophyll Content ◽  
Plant Height ◽  
Dry Matter ◽  
Light Interception ◽  
Forage Yield ◽  
Content Index ◽  
Agrosilvopastoral Systems ◽  
Agrosilvopastoral System ◽  
Ear Height ◽  
Corn Plants

Corn and grass intercropping is an interesting practice, and forage plants belonging to the genus Urochloa are the most commonly used in these situations. These plants show excellent adaptation to low-fertility soil, easy establishment, considerable biomass production, as well as being an important competitor with weeds. In agrosilvopastoral systems, the yield of corn crops grown together with trees is hindered due to the reduced radiation incidence caused by tree shading. This study aimed to evaluate corn growth, light interception, and chlorophyll content when intercropped with marandu grass in an agrosilvopastoral system with one and three eucalyptus rows, and compare them with plants under full sun. The experiment was conducted in Andradina - SP (Brazil). Treatments consisted of intercropping with no eucalyptus (plants under full sun: control), one system with one eucalyptus row and another with three rows. We also assessed the effect of five distances between corn plants and eucalyptus trees (2, 4, 6, 8, and 10 m). Between eucalyptus rows, corn plants were intercropped with marandu grass. The analyzed variables were corn plant height, ear height, chlorophyll content index, light interception, dry matter, and fresh and dry forage weights. The experimental design was a randomized block in a factorial scheme plus a control, with four repetitions. Tree arrangements had no influence on corn forage, dry matter, plant height, or ear height. Lower results of yield, dry matter, plant height, and ear height were observed for plants spaced 2 m from trees. In the first two evaluations, significant differences of light interception were found for the different distances. Neither tree arrangements (one and three rows) nor the distances from the trees had any impact on corn heights, with no difference between control and the agrosilvopastoral systems. Neither plant distances from trees nor tree arrangements had an influence on chlorophyll content index of corn plants, with no difference between control and the treatments. As a result, corn growth and forage yield under agroforestry systems are similar in arrangements of 1 and 3 eucalyptus rows (15-month-old trees) and under full sun. However, corn dry matter contents were lower in systems containing trees. Intercropping corn and marandu grass in a system without trees increased light interception at harvest time, indicating a larger soil coverage. Corn forage yield and dry matter content were lower when plants were 2 m apart from eucalyptus trees since this condition provided a lower amount of light and greater competition for water and nutrients.

scholarly journals Performance of gerbera varieties under naturally ventilated polyhouse

2021 ◽  
Vol 23 (3) ◽  
pp. 351-355
Author(s):  
M. VIJAYALAXMI ◽  
Keyword(s):  
Leaf Area ◽  
Chlorophyll Content ◽  
Plant Height ◽  
Growth Parameters ◽  
Flower Stalk ◽  
Disc Diameter ◽  
Stalk Diameter ◽  
Flower Diameter ◽  
Number Of Leaves ◽  
Ray Florets

An experiment was conducted to evaluate ten varieties of gerbera under polyhouse conditions in Hyderabad. Vegetative, flowering and flower characters varied significantly among the cultivars and variations in different growth parameters were prominent. Mean performance of the cultivars revealed that cv. Helix recorded maximum plant height, flower diameter, flower stalk diameter and ray florets. The same cultivar Helix also produced maximum number of suckers per plant, number of flowers per plant, Fresh weight of flower, dry weight of flower and possessed longest field life which was at par with cv. Goliath. The cv. Goliath found superior with respect to maximum chlorophyll content, minimum days required for commence of first-flower and days taken for 50% flowering.Maximum disc diameter and number of leaves were produced by cv. balance. While cv. Savannah had significantly maximum leaf area and length of the flower stalk. However, the cv. ‘Montenegro recorded least mean value in terms of plant height, number of leaves per plant, leaf length, leaf breadth, leaf area, number of suckers, chlorophyll content, flower diameter, flower stalk diameter, ray florets, disc diameter, number of flowers per plant and took maximum days for first flower opening, 50 % flowering and which was late in inducing flowering had lesser duration of flowering. Cultivar Helix exerted best performance on various growth and flower characters along with the cultivars Goliath, Danaellen, Balance and Savannah.

scholarly journals Agronomic responses of three potted Crysanthemum (Dendranthema grandiflora Tzvelev) varieties to inorganic and organic fertilizers

2021 ◽  
Vol 306 ◽  
pp. 01053
Author(s):  
Rika Meilasari ◽  
Kurnia Yuniarto ◽  
Eka Mirnia ◽  
Yuniarti ◽  
Ratna Andam Dewi
Keyword(s):  
Plant Height ◽  
Organic Fertilizer ◽  
Ornamental Plants ◽  
Nutrient Content ◽  
Leaf Length ◽  
Organic Fertilizers ◽  
Leaf Width ◽  
Inorganic Fertilizers ◽  
Flower Diameter ◽  
Inorganic And Organic

Potted chrysanthemums as one of high-demand potted ornamental plants are mostly cultivated using inorganic fertilizers. The organic fertilizers use as an alternative and complementary to inorganic fertilizers on potted chrysanthemum cultivation needs to be studied further. This study aims to determine the response of inorganic and organic fertilizer to agronomic characters of three potted Chrysanthemum varieties. The research was carried out in West Sumatra AIAT’s greenhouse from October to December 2020 using split-plot design with three replications. The main plots were fertilizer treatments (control, inorganic fertilizers, Bio-urine organic fertilizers) and sub-plots consisted of three potted chrysanthemum varieties (Armita, Avanthe, and Naura). Bio-urine organic fertilizers nutrient content N, P and K. The results showed that agronomic character of plant height, leaf length, leaf width, and the number of internodes resulted from type of fertilization treatments were significantly different. The highest plant height, leaf width, and number of internodes were significantly achieved in inorganic fertilizers then followed by Bio-urine organic fertilizers and control. The highest growth for the characters of plant height, stem diameter, leaf length, leaf width, petiole length, and flower diameter were attained from Avanthe. The interaction between fertilizers types and varieties was not significantly different in all observed characters.

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