scholarly journals Effect of growth regulators on the postharvest longevity of cut flowers and leaves of the calla lily (Zantedeschia Spreng.)

2012 ◽  
Vol 64 (4) ◽  
pp. 91-98 ◽  
Author(s):  
Beata Janowska ◽  
Anna Stanecka
Keyword(s):  
Protein Degradation ◽  
Growth Regulators ◽  
Chlorophyll Degradation ◽  
Cut Flowers ◽  
Calla Lily ◽  
Combined Application ◽  
Continuous Basis ◽  
Postharvest Longevity ◽  
Greenness Index

The conditioning of flowers of the calla lily cultivar 'Albomaculata' in BA at concentrations of 50-150 mg×dm<sup>-3 </sup>extends their postharvest longevity by 6.2-14.5 days. An extension of the longevity of the flowers by 15 days can be obtained after the application of a solution of 8HQS with saccharose on a continuous basis. Effective in improving the longevity of leaves of cultivar 'Sunglow' is GA<sub>3</sub> at a concentration of 400 mg×dm<sup>-3</sup>. What is more, its application at concentrations of 300-400 mg×dm<sup>-3</sup> boosts their greenness index. GA<sub>3</sub> at concentrations of 50 and 100 mg×dm<sup>-3</sup> extends the postharvest longevity of leaves of the cultivar 'Black Eyed Beauty' by 18 and 11 days, respectively, while BA shortens it. A combined application of BA and GA<sub>3</sub> inhibits chlorophyll degradation, while GA<sub>3</sub> and a mixture of BA and GA<sub>3</sub> inhibit protein degradation.

scholarly journals Effect of growth regulators on flower and leaf yield of the calla lily (Zantedeschia Spreng.)

2013 ◽  
Vol 40 (No. 2) ◽  
pp. 78-82 ◽  
Author(s):  
B. Janowska
Keyword(s):  
Gibberellic Acid ◽  
Growth Regulators ◽  
Water Solution ◽  
Calla Lily ◽  
Leaf Yield ◽  
Black Magic ◽  
Greenness Index

To assess the effect of a mixture of benzyladenine and gibberellic acid on the quality and yield of flowers and leaves of cvs Albomaculata, Black Magic and Mango, their tubers were soaked before planting for 30 min in a water solution with 100&ndash;600 ppm BA and 150 ppm GA3. The BA + GA3 mixture application resulted in 2.5&ndash;3.5 times as many flowers in comparison to the control plants, which did not affect the quality of flowers and the yield of leaves. The leaves, however, showed higher greenness index and protein quantity. &nbsp; &nbsp;

PERSPECTIVE IN THE USE OF GROWTH REGULATORS TO INCREASE THE CUT FLOWERS VASE LIFE

1979 ◽  
pp. 135-142 ◽  
Author(s):  
A. PAULIN ◽  
K. MULOWAY
Keyword(s):  
Growth Regulators ◽  
Vase Life ◽  
Cut Flowers

scholarly journals Effect of growth regulators and microfertilizers on yield of Echinacea purpurea L. depending on weather conditions

2021 ◽  
Vol 187 (3) ◽  
pp. 35-42
Author(s):  
N.I. Sidelnikov ◽  
◽  
O.A. Bykova ◽  
R.R. Tkhaganov ◽  
◽  
...  
Keyword(s):  
Growth Regulators ◽  
High Efficiency ◽  
Biomass Yield ◽  
Foliar Application ◽  
Weather Conditions ◽  
Echinacea Purpurea ◽  
Raw Material ◽  
Combined Application ◽  
Air Temperatures ◽  
Western Ciscaucasia

In the Western Ciscaucasia, frequent droughts lead to a decrease in the yield of Echinacea purpurea L., which is a base for immunostimulating preparations. It is possible to mitigate the effect of sharp fluctuations in weather conditions by using growth regulators and microfertilizers, the exogenous application of which allows mobilizing the potential capabilities of the plant organism aimed at increasing its bioproductivity. The purpose of the research was to study the effect of foliar application the growth regulator Zircon and silicon-containing microfertilizer Siliplant on the yield of Echinacea biomass depending on the weather conditions. The weather conditions during the research years differed. Thus, in 2011– 2014, the average daily air temperatures and the amount of precipitation from May to July were almost at the level of the average annual values. And starting from 2015 there has been a significant increase in temperatures and a decrease in moisture availability. Foliar treatment of Echinacea purpurea with Zircon and Siliplant under drought ensured an increase in the biomass yield by 15–20% compared to the control, under stable weather conditions – by 11–18%. Their combined application increased the yield of the green weight by 24–31%, under stable weather conditions – by 18–24%. The high efficiency of the preparations was manifested in the growth of the root system under drought conditions, where the increase in yield was 40–43% at their combined application. The content of hydroxycinnamic acids in the raw material increased by 4–6% regardless of weather conditions and by 9– 10% in the variant Siliplant + Zircon application. Losses of biomass yield under hydrothermal stress amounted to 1–10%, of roots – 4–5%, while in the control the values were 15–25 and 18%, respectively. The biggest preservation of the yield was noted in the Siliplant + Zircon variant, where there was even a small increase in biomass yield – by 4–9%, in roots – by 4%.

scholarly journals Effects of Daily Harvest Time on Postharvest Longevity, Water Relations, and Carbohydrate Status of Selected Specialty Cut Flowers

HortScience ◽  
2014 ◽  
Vol 49 (3) ◽  
pp. 297-305
Author(s):  
Iftikhar Ahmad ◽  
John M. Dole ◽  
Frank A. Blazich
Keyword(s):  
Vase Life ◽  
Harvest Time ◽  
Cut Flowers ◽  
Weight Changes ◽  
Eustoma Grandiflorum ◽  
Relative Water ◽  
Leaf Relative Water Content ◽  
Postharvest Longevity ◽  
Carbohydrate Status ◽  
Time Of Harvest

Effects of harvest time (morning, noon, or afternoon) on water uptake, fresh weight changes, termination symptoms, leaf relative water content (LRWC), carbohydrate status, and vase life of cut ‘ABC Purple’ lisianthus (Eustoma grandiflorum Salisb.), ‘Double Eagle’ African Gold Coin Series marigold (Tagetes erecta L.), and ‘Deep Red’ Benary’s Giant Series zinnia (Zinnia elegans Jacq.) were studied. For stems of lisianthus harvested and then stored in the dark with the basal ends in water for 2 weeks at 3 ± 1 °C, those harvested at noon (1200 hr to 1300 hr) or in the afternoon (1700 hr to 1800 hr) had longer vase life compared with stems harvested in the morning (0700 hr to 0800 hr). However, stems of lisianthus evaluated without storage had no differences in vase life. Stems of marigold harvested in the afternoon had longer vase life than morning- or noon-harvested stems. Time of harvest had no effect on cut flower longevity of zinnia. However, vase life was considerably shorter for stems of all species when tested after 2 weeks storage compared with freshly harvested stems. Stems of zinnia harvested at noon had lower LRWC than morning- or afternoon-harvested stems. Marigold stems harvested in the afternoon and evaluated without storage had lowest LRWC on Day 7 of vase life. Harvest time or storage did not influence LRWC of lisianthus. Stems of marigold and lisianthus harvested at noon or in the afternoon had higher levels of carbohydrates compared with morning-harvested stems, whereas freshly harvested stems had higher concentrations of glucose and sucrose, which decreased during storage or the vase period. Sucrose concentrations varied more significantly among various tissues than other sugars presumably as a result of translocation during vase life. In summary, carbohydrate status of stems harvested at different times of the day varied greatly and affected postharvest longevity of cut marigold and lisianthus, but not zinnia.

scholarly journals Relações hídricas em hastes florais de copo-de-leite colhidas em diferentes estádios de abertura

2015 ◽  
Vol 21 (3) ◽  
pp. 368
Author(s):  
Thais Silva Sales ◽  
Patrícia Duarte de Oliveira Paiva ◽  
Guilherme Mariano Manfredini ◽  
Ângela Maria Pereira Nascimento ◽  
Maria Leandra Resende Castro
Keyword(s):  
Water Retention ◽  
Quality Analysis ◽  
Postharvest Quality ◽  
Water Retention Capacity ◽  
Cut Flowers ◽  
Retention Capacity ◽  
Zantedeschia Aethiopica ◽  
Calla Lily ◽  
Water Ph ◽  
Stem Water

Cut flowers are a well established product and require conservation techniques that help keep postharvest quality for marketing. In this context, the objective of this study was to evaluate different opening stages of calla lily (Zantedeschia aethiopica) cut stems and their influence on posthaverst. Calla lily stems were harvested in the morning, according to the following opening stages: closed spathe, semi-closed spathe (1/3 open), semi-open spathe (2/3 open) and fully open spathe. Once selected and standardized, stems were placed in a controlled room at 21 ± 2 °C and relative humidity of 75 ± 5%, for eight days. The evaluations were conducted daily, observing water pH, commercial quality analysis, width and length of the spathe, fresh weight of stem, water absorption and transpiration. The experimental design was completely randomized, with four treatments (opening stages), five replicates and two stems by plot. The model used was split plot in time, with harvest stages as plots, and evaluation days as subplots. Calla lily harvested at closed spathe and semi-closed spathe (1/3 open), showed spathe opening, although it did not achieve fully spathe expansion, had higher water uptake and hydration of flower stems, and increased water retention capacity by floral tissues until saturation, followed by a period of weight reduction caused by transpiration rates greater than absorption.

scholarly journals Influence of various chemical compounds on postharvest longevity of cut leaves of Waldsteinia geoides Willd.

2014 ◽  
Vol 67 (3) ◽  
pp. 83-90 ◽  
Author(s):  
Maria P. Ulczycka-Walorska ◽  
Agnieszka Krzymińska
Keyword(s):  
Gibberellic Acid ◽  
Chemical Compounds ◽  
Favorable Effect ◽  
Application Method ◽  
Postharvest Longevity ◽  
Cut Leaves ◽  
Leaf Greenness ◽  
Greenness Index ◽  
Methods Of Application

The influence of conditioning and different methods of application of chemical compounds on cut leaves of <em>Waldsteinia geoides </em>was assessed<em>.</em> Gibberellic acid and benzyladenine at a concentration of 50 or 100 mg × dm<sup>-3</sup>, and 8-hydroxyquinoline sulphate at a concentration of 200 mg × dm<sup>-3</sup> were used in the process of conditioning. The leaves were conditioned in two different ways. In the first one, half of leaf stalks were soaked for 24 hours. In the latter, whole leaf blades were dipped for thirty seconds. Cut leaves were stored either in water or in the solution of 8-hydroxyquinoline sulphate at a concentration of 200 mg × dm<sup>-3</sup>. It was both the chemical compounds applied and the application method that influenced the postharvest longevity of the leaves. The leaves conditioned in 8HQS and stored in water, those conditioned in BA at a concentration of 50 mg × dm<sup>-3</sup> and stored in 8HQS, and those which were not conditioned and stored in 8HQS exhibited the highest level of postharvest longevity. The application of 8HQS for conditioning had a favorable effect on the increase in the weight of<em> Waldsteinia geoides</em> cut leaves<em>.</em> 8HQS applied in storing resulted in a smaller decrease in the values of the leaf greenness index.

scholarly journals POTENTIAL OF CHLORINE DIOXIDE TO EXTEND THE LONGEVITY OF CUT FLOWERS

HortScience ◽  
2006 ◽  
Vol 41 (3) ◽  
pp. 503E-503
Author(s):  
Andrew J. Macnish ◽  
Ria T. Leonard ◽  
Terril A. Nell
Keyword(s):  
Chlorine Dioxide ◽  
Deionized Water ◽  
Aerobic Bacteria ◽  
Vase Life ◽  
Gerbera Jamesonii ◽  
Cut Flower ◽  
Cut Flowers ◽  
Fresh Cut ◽  
Postharvest Longevity ◽  
Number Of Bacteria

The postharvest longevity of fresh-cut flowers is often limited by the accumulation of bacteria in vase water and flower stems. Aqueous chlorine dioxide is a strong biocide with potential application for sanitizing cut flower solutions. We evaluated the potential of chlorine dioxide to prevent the build-up of bacteria in vase water and extend the longevity of cut Matthiola incana `Ruby Red', Gypsophila paniculata `Crystal' and Gerbera jamesonii `Monarch' flowers. Fresh-cut flower stems were placed into sterile vases containing deionized water and either 0.0 or 2 μL·L–1 chlorine dioxide. Flower vase life was then judged at 21 ± 0.5 °C and 40% to 60% relative humidity. Inclusion of 2 μL·L–1 chlorine dioxide in vase water extended the longevity of Matthiola, Gypsophila and Gerbera flowers by 2.2, 3.5, and 3.4 days, respectively, relative to control flowers (i.e., 0 μL·L–1). Treatment with 2 μL·L–1 chlorine dioxide reduced the build-up of aerobic bacteria in vase water for 6 to 9 days of vase life. For example, addition of 2 μL·L–1 chlorine dioxide to Gerbera vase water reduced the number of bacteria that grew by 2.4- to 2.8-fold, as compared to control flower water. These results confirm the practical value of chlorine dioxide treatments to reduce the accumulation of bacteria in vase water and extend the display life of cut flowers.

Zantedeschia aethiopica and Z. `Green Goddess' Responses to GA3 and Bonzi for Cut Flower Calla Lily Production in Florida

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 536f-537
Author(s):  
Ramona A. Reiser
Keyword(s):  
Gibberellic Acid ◽  
Flower Development ◽  
Cut Flower ◽  
Cut Flowers ◽  
Large White ◽  
Flower Production ◽  
Zantedeschia Aethiopica ◽  
Calla Lily ◽  
Growing Conditions ◽  
Unique Green

Zantedeschia aethiopica, the large white calla lily, and Z. `Green Goddess', which is white with a unique green blush on the lip, are two cultivars popular in the floral cut flower trade. Both were treated with gibberellic acid (GA3) for increased flower development, a technique routinely successful for potted calla production but not previously reported effective on cut flowers. Two winter trials in successive years were replicated under Florida growing conditions. A preplant bulb dip of GA3 ranged from 100 to 250 ppm. Z. aethiopica control plants averaged 1.3 flowers per plant, which increased to 3.4 with GA3 in the first trial and from 1.6 to 2.5 in the second trial. `Green Goddess' went from 1.3 to 3.8 flowers per plant and 0.9 to 3.3, respectively. Bonzi was applied at either a short (10.2–12.7 cm) or tall (30.5–38.1 cm) height, with greater effect when shorter. A drench application of 2 mg a.i. per pot shortened foliage more than flower height with 32% reduction on foliage and 12% on flowers for Z. aethiopica and 44% and 33% respectively on `Green Goddess'. Results favor use of GA3 on cut flowers for increased flower production, but discourage Bonzi because shortened heights are normally undesirable for cut flowers.

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