scholarly journals Post-harvest longevity of leaves of the sea lavender (Limonium latifolium (Sm.) Kuntze) after application of growth regulators

2013 ◽  
Vol 40 (No. 4.) ◽  
pp. 172-176
Author(s):  
B. Janowska ◽  
R. Grabowska ◽  
E. Ratajczak
Keyword(s):  
Gibberellic Acid ◽  
Growth Regulators ◽  
Ornamental Plants ◽  
Favourable Effect ◽  
Distilled Water ◽  
Post Harvest ◽  
Conditioning Treatment ◽  
Sea Lavender ◽  
Leaf Greenness

Conditioning is a simple and effective method of post-harvest longevity of both flowers and florists&rsquo; greens. Performing this treatment immediately after harvest by the producer increases the quality of floral products expressed as their post-harvest longevity. The purpose of this study was to assess the influence of four growth regulators from the gibberellin and cytokinin groups applied as a 4-h conditioning treatment of leaf blades and to determine any effects on post-harvest longevity of leaves of Limonium latifolium. The leaves were harvested early in the morning from the department of ornamental plants collection. Selected leaves were fully-developed and had no damage or discolouring. Gibberellic acid, benzyladenine, meta- methoxytopolin and its riboside at the concentrations of 25, 50 and 75 mg/dm<sup>3 </sup>were taken up in a solution for 4-h leaf-conditioning of Limonium latifolium at the temperature of 18&ndash;20&deg;C. After the conditioning treatment the leaves were placed in distilled water. Leaves placed into distilled water immediately after cutting served as control. Gibberellic acid, benzyladenine and topolins applied as leaf conditioning treatment extended the post-harvest longevity of leaves of Limonium latifolium. Examined growth regulators, with the exception of riboside of meta-methoxytopolin, also had a favourable effect on the index of leaf greenness.

scholarly journals The effect of growth regulators on post-harvest Alchemilla mollis (Bauser) Rothm. leaf longevity

2016 ◽  
Vol 28 (2) ◽  
pp. 137-142
Author(s):  
Beata Janowska ◽  
Roman Andrzejak ◽  
Patrycja Jakubowska ◽  
Agnieszka Antkowiak ◽  
Daria Nawrot ◽  
...  
Keyword(s):  
Gibberellic Acid ◽  
Growth Regulators ◽  
Ornamental Plant ◽  
Leaf Longevity ◽  
Distilled Water ◽  
Acid Solutions ◽  
Post Harvest ◽  
Plant Collection ◽  
The Subject

AbstractLeaves ofAlchemilla mollis(Bauser) Rothm. were the subject of the study. The leaves were harvested early in the morning from the department’s ornamental plant collection. Selected leaves were fully-developed and showed no signs of damage or discolouring. Gibberellic acid (GA3), benzyladenine (BA),meta-methoxytopolin (MemT) and its riboside (MemTR) at concentrations of 25, 50 and 75 mg dm−3were applied in the form of solutions to four-hour leaf-conditioning in the room at a temperature of 18-20°C. After conditioning, the leaves were placed in distilled water. Leaves put into distilled water immediately after cutting served as the control. The post-harvest longevity of leaves ofAlchemilla molliswas 7.2-11.8 days. The conditioning of leaves in gibberellic acid solutions at concentrations of 25-50 mg dm−3, benzyladenine at concentrations of 25 mg dm−3andmeta-methoxytopolin and its riboside at concentrations of 75 mg dm−3extended the post-harvest longevity of leaves by 10.1-81.9%. The conditioning of leaves in gibberellic acid at a concentration of 50 mg dm−3inhibited the degradation of chlorophyll, as indicated by the highest SPAD index values.

Dormancy responses to post-harvest application of growth regulators in Dioscorea species. 2. Dormancy responses in ware tubers of D. alata and D. esculenta

1984 ◽  
Vol 102 (2) ◽  
pp. 433-436 ◽  
Author(s):  
Lynda D. Wickham ◽  
H. C. Passam ◽  
L. A. Wilson
Keyword(s):  
Gibberellic Acid ◽  
Growth Regulators ◽  
Acid Treatment ◽  
Storage Time ◽  
Storage Life ◽  
Dioscorea Alata ◽  
Dormant Period ◽  
Post Harvest ◽  
Dioscorea Species ◽  
Gibberellic Acid Treatment

SummaryThe effects of post-harvest application of gibberellic acid on dormancy of tubers of Dioscorea alata and D. esculenta were examined. In both species, gibberellic acid extended the dormancy of immature and mature tubers but when GA3 application was made after storage for varying lengths of time, there was a decreasing effect with increased storage time. Dormancy was also reinduced in germinating tubers, that had gone through a normal dormant period, as a result of gibberellic acid treatment. A possible mechanism of dormancy in tropical yams is discussed. It is concluded that use of gibberellic acid as a means of extending the storage life of yam tubers by post-harvest application is a distinct possibility.

scholarly journals Plant growth regulators in the germination of Diospyros hispida A. DC. (EBENACEAE) seeds

2021 ◽  
Vol 10 (2) ◽  
pp. e27110212471
Author(s):  
Aline Bueno Ramalho ◽  
Lúcia Filgueiras Braga
Keyword(s):  
Plant Growth ◽  
Gibberellic Acid ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Germination Rate ◽  
Dry Mass ◽  
Shoot Length ◽  
Distilled Water ◽  
Seedling Production ◽  
Mean Germination Time

Plant growth regulators in the germination of Diospyros hispida A. DC. (Ebenaceae) Seed. Diospyros hispida species is a native fruit that has long germination period, hindering seedling production. The aim of this work was to evaluate the germination of Diospyros hispida seeds under the effect of gibberellic acid and biostimulant applications. Four replicates of 25 seeds per treatment were used. Treatments were: T1 - distilled water, T2, T3 and T4 - GA3 solutions at 100, 150 and 200 mg L-1, respectively, T5 - Immersion for 24 hours in distilled water with aeration, T6, T7 and T8 - Immersion for 24 hours in aerated GA3 solutions at 100, 150 and 200 mg L-1, respectively, T9, T10 and T11 - biostimulant application (containing auxin, gibberellin and cytokinin) at 3, 5 and 7 ml kg-1 of seeds. Germination rate, mean germination time, germination speed index, synchronization index, relative germination frequency, normal seedlings, root length, shoot length and seedling dry mass were evaluated. The effect of gibberellic acid and biostimulant containing auxin, gibberellin and cytokinin negatively influenced Diospyros hispida germination under the conditions of this study.

scholarly journals Gibberellic Acid Can Improve Seed Germination and Ornamental Quality of Selected Cyclamen Species Grown Under Short and Long Days

Agronomy ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 516 ◽  
Author(s):  
Mihaiela Cornea-Cipcigan ◽  
Doru Pamfil ◽  
Cristian Radu Sisea ◽  
Rodica Mărgăoan
Keyword(s):  
Gibberellic Acid ◽  
Ornamental Plants ◽  
Germination Percentage ◽  
Seedling Vigor ◽  
Higher Plant ◽  
Vigor Index ◽  
Mean Germination Time ◽  
Number Of Leaves ◽  
Ornamental Crops

Cyclamen species (swinebread spp.) are perennial herbaceous plants which belong to the Primulaceae family, widely used as medicinal or ornamental plants. Currently, gibberellic acid (GA3), an environmentally friendly bioregulator is widely used to enhance the productivity and phenotypic characteristics of multiple ornamental crops. A dual experiment was conducted to evaluate the influence of gibberellic acid (50, 100 or 150 mg/L), on germination earliness of seeds, along with growth and ornamental quality of selected Cyclamen species. Additionally, a greenhouse experiment with long and short sunlight photoperiod was conducted to evaluate its importance in the development of Cyclamen plants. Our results indicated that under short sunlight exposure, seeds germinated earlier than those kept in long sunlight photoperiod. Plants treated with foliar applications of GA3 exhibited higher plant height, leaf area, number of leaves, root length and tuber development. Significant differences were found in germination percentage (GP), mean germination time (MGT) and seedling vigor index (SVI), within different GA3 supplementation and greenhouse sunlight intensity (short and long days). In conclusion, our study suggests that seedling vigor and ornamental quality can be increased by GA3 application, an economic strategy for enhancing germination and growth of selected Cyclamen species.

Influence of 8-hydroxyquinoline sulphate and sucrose treatments on the post-harvest quality of cut flowers of Strelitzia reginae and Hippeastrum vittatum

2009 ◽  
Vol 57 (2) ◽  
pp. 165-174
Author(s):  
F. Hassan
Keyword(s):  
Vase Life ◽  
Distilled Water ◽  
Cut Flower ◽  
Cut Flowers ◽  
Fresh Weight ◽  
Initial Weight ◽  
Post Harvest ◽  
Strelitzia Reginae ◽  
And Control

This investigation was carried out to study the effect of 100, 200 and 300 ppm 8-hydroxyquinoline sulphate (8-HQS) and 5 and 10% sucrose treatments on the vase life and post-harvest quality of cut flowers of Strelitzia reginae Ait. and Hippeastrum vittatum Herb. cv. Apple Blossome. All possible combinations of 8-HQS and sucrose were tested. The treatments were applied as holding solutions, and control flowers were held in distilled water till the end of the experiment. All the treatments significantly increased the vase life and number of open florets of Strelitzia reginae cut flowers compared to the control. Applying 8-HQS and sucrose treatments in both seasons improved the vase life and floret longevity of Hippeastrum vittatum cut flowers. In addition, the percentage of fresh weight gain from the initial weight and the carbohydrate content were also enhanced in both cut flower crops. In order to obtain the highest post-harvest quality of Strelitzia reginae Ait. and Hippeastrum vittatum Herb. cv. Apple Blossome cut flowers, treatment with 200 ppm 8-HQS + 10% sucrose was recommended.

Effects of growth regulators and bunch trimming on size, maturity and yield of sultana grapes

1970 ◽  
Vol 10 (45) ◽  
pp. 474 ◽  
Author(s):  
RS Sproule ◽  
MC Stannard
Keyword(s):  
Gibberellic Acid ◽  
Growth Regulators ◽  
Total Yield ◽  
Fresh Fruit ◽  
Full Bloom ◽  
Berry Size ◽  
Normal Shape ◽  
Berry Set

Three experiments were done over two seasons on the effect of gibberellic acid (GA) and parachlorophenoxyacetic acid (PCPA) sprays and bunch trimming on the yield, berry characters, maturity, and bunch quality of sultanas. GA applied at the shatter stage at 10 p.p.m. increased berry size and bunch quality of fresh fruit. When applied at full bloom, berry size was increased and earlier maturity was induced but berry set and yield were reduced. If applied at commencement of bloom. GA caused considerable thinning and the bunches were unattractive. Splitting the application into two 5 p.p.m. applications at commencement and full bloom was also unsatisfactory. A combined spray of PCPA and GA at shatter stage retarded maturity but increased berry size and yield over GA alone. It was shown that PCPA should be applied separately several days after shatter to avoid retention of shoe bellies. GA increased berry size mainly by elongation. Addition of PCPA produced larger berries of more normal shape. Bunch trimming decreased total yield of most treatments, but did not increase quantity of marketable fresh fruit. However, in general, berry length, diameter, and weight were increased by trimming. The importance of thorough wetting of the bunches by gibberellic acid sprays was demonstrated in a dipping experiment.

scholarly journals Study on waxing of cut foliage post harvest life of few ornamental species

2014 ◽  
Vol 6 (2) ◽  
pp. 619-624 ◽  
Author(s):  
Vivek Powar ◽  
Bhavya Bhargava ◽  
Ghumare Vikas
Keyword(s):  
Water Uptake ◽  
Ornamental Plants ◽  
Vase Life ◽  
Post Harvest ◽  
Maximum Water ◽  
Cut Foliage ◽  
Emulsion Concentration ◽  
Ornamental Species ◽  
Foliage Weight

Enhancing the vase life of cut foliages is one of the prime goals of floriculturist and it is very interesting and important aspect of floriculture.The efforts were made to find out best waxing treatment for enhancing the vase life along with excellent quality maintenance for few cut foliage species .The objective was to evaluate optimum percent wax solution for improving post harvest life and quality of ornamental plants. Different wax emulsion treatments (0.25, 0.50, 0.75 and 1.00 %) showed significant results in both quantitative and qualitative attributes of ornamental species. In Asparagus densiflorus ‘Sprengeri’ and Eucalyptus teritecornis,0.75% wax emulsion concentration recorded minimum foliage weight (5.62, 20.49 g) and minimum water uptake (5.60, 32.73 ml) respectively on 3rd day, while maximum foliage weight (0.90, 6.84 g) and maximum water uptake (1.13, 13.77 ml) was recorded on senescence day. In Caryota urens (Fishtail palm) 0.50% wax emulsion concentration recorded minimum foliage weight (9.71 g), minimum water uptake (6.53 ml) on 3rdday, while maximum foliage weight(1.83 g) and maximum water uptake (1.20 ml) on senescence day. In Heliconia psittachroum cv. Golden Torch, 1.00 % wax emulsion concentration recorded minimum foliage weight (28.85 g), minimum water uptake (20.35 ml) on 3rdday, whereas maximum foliage weight (15.83 g)and maximum water uptake (5.75 ml) on senescence day. There was improvement and increament in post harvest quality and vase life of studied ornamental cut foliages.

scholarly journals Sprouting Temperature and Growth Regulators Influence Cut Flower Quality of Sandersonia aurantiaca

HortScience ◽  
1998 ◽  
Vol 33 (7) ◽  
pp. 1167-1171 ◽  
Author(s):  
Lindsay J. Davies ◽  
Ian R. Brooking ◽  
Jocelyn L. Catley ◽  
Elizabeth A. Halligan
Keyword(s):  
Gibberellic Acid ◽  
Growth Regulators ◽  
Stem Length ◽  
Cut Flower ◽  
Flower Stem ◽  
Stem Quality ◽  
Temperature And Growth ◽  
Flower Quality ◽  
Cut Flower Quality

Tubers of Sandersonia aurantiaca Hook. were soaked in 1000 mg·L-1 GA3, 20 mg·L-1 uniconazole, 200 mg·L-1 benzyladenine, or water for 2 hours and then sprouted at 12, 18, or 24 °C. The effects of these treatments on flower stem quality were then determined at forcing temperatures of 18, 24, or 30 °C. Stem length increased with sprouting temperature only at a forcing temperature of 18 °C. Floret numbers increased with sprouting temperature at all forcing temperatures, but the effect was greatest at the 18 °C forcing temperature. The 12 °C sprouting treatment reduced floret numbers at all forcing temperatures. Soaking tubers in GA3 increased stem length but drastically reduced floret numbers, while soaking in uniconazole reduced stem length but had no significant effect on floret numbers. Soaking in BA strongly promoted branching, which resulted in large increases (>30%) in floret numbers per stem with little change in stem length. Of the three growth regulators, only BA was effective in improving cut flower stem quality. Chemical names used: gibberellic acid (GA3); (E)-(+)-(S)-(4-chlorophenyl)-4,4-dimethyl-2-(1,2,4-triazol-1-yl)-pent-1-ene-3 -ol (uniconazole); N6-benzylamino purine (benzyladenine; BA).

scholarly journals Yield and Quality of Inflorescences in the Zantedeschia albomaculata (Hook.) Baill. ‘Albomaculata’ after the Treatment with AMF and GA3

Agronomy ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 644
Author(s):  
Roman Andrzejak ◽  
Beata Janowska
Keyword(s):  
Aqueous Solution ◽  
Arbuscular Mycorrhizal Fungi ◽  
Gibberellic Acid ◽  
Mycorrhizal Fungi ◽  
Arbuscular Mycorrhizal ◽  
Favourable Effect ◽  
Calla Lily ◽  
Yield And Quality ◽  
Mycorrhizal Inoculation

This study was conducted to assess the influence of gibberellic acid (GA3) and arbuscular mycorrhizal fungi (AMF) on the flowering and quality of Zantedeschia albomaculata (Hook.) Baill ‘Albomaculata’ plants. Before planting, the rhizomes were soaked in water or an aqueous solution of GA3 at a concentration of 150 mg dm−3 for 30 min. A mixture of AMF was applied to the rhizomes a week after planting. The AMF treatment increased the yield of inflorescences of the ‘Albomaculata’ cultivar by 100%. AMF and GA3 had a favourable effect on the quality of inflorescences, expressed by the length of peduncles, whereas AMF individually positively affected the length of the spathes. AMF and GA3 had no effect on the level of macroelements in calla lily leaves, with the exception of calcium (Ca). The leaves of mycorrhized plants had a high content of sodium (Na) and micronutrients, except for iron (Fe). The results of the study showed that GA3 could be replaced by mycorrhizal inoculation when applied to Zantedeschia plants.

scholarly journals Effect of gibberellic acid spraying and soaking of rhizomes on the growth and flowering of calla lily (Zantedeschia Spreng.)

2012 ◽  
Vol 63 (2) ◽  
pp. 155-160 ◽  
Author(s):  
Beata Janowska ◽  
Roman Andrzejak
Keyword(s):  
Gibberellic Acid ◽  
Slow Release ◽  
Water Solution ◽  
Pine Bark ◽  
Good Effect ◽  
Calla Lily ◽  
Number Of Leaves ◽  
Black Magic ◽  
Leaf Greenness

Rhizomes of <i>Zantedeschia</i>, 15-18 cm in circumference with leaf buds 0.5-1 cm in length, were planted into 20-cm pots on 15 May 2006 into a medium consisting of peat with a pH of 6.2, enriched with a slow-release fertiliser Osmocote Plus (3-4M) and mixed with fresh shredded pine bark at a rate of 3:1 (v:v). Before planting, the rhizomes were soaked for 20 minutes in a water solution of gibberellic acid at a concentration of 150 mg x dm<sup>-3</sup>, or sprayed with the same concentration once, twice or three times, each time after thorough drying. For each round of spraying, 100 ml of the solution were used. Gibrescol 10 MG was applied. Gibberellic acid had a similar effect, whether applied in the form of a solution for soaking or spraying of rhizomes. The number of sprayings of rhizomes had no effect on the effectiveness of gibberellic acid. In the cultivar 'Black Magic', rhizome spraying caused earlier flowering, while in 'Cameo' a similar effect was obtained by soaking the rhizomes in gibberellic acid. Gibberellic acid had no effect on the quality of flowers and the number of leaves. Gibberellic acid had a good effect on the index of leaf greenness in the cultivars under study.

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