scholarly journals 1-MCP and STS as ethylene inhibitors for prolonging the vase life of carnation and rose cut flowers

2004 ◽  
Vol 10 (4) ◽  
Author(s):  
F. Hassan ◽  
G. Schmidt ◽  
Y. M. Hafez ◽  
M. Pogány ◽  
J. Ankush
Keyword(s):  
Heavy Metal ◽  
Ethylene Production ◽  
Untreated Control ◽  
Postharvest Quality ◽  
Vase Life ◽  
Ethylene Inhibitors ◽  
Cut Flowers ◽  
Initial Weight ◽  
Silver Thiosulfate

The effect of STS and 1-MCP on the postharvest quality of carnation and rose cut flowers was studied. Cut flowers of Dianthus c..aryophyllus L. cv. Asso and Rosa hybritia cv. Baroness were treated with silver thiosulfate (STS) at 0.4 mM with sucrose at 50 g 1-t and 1-methylcyclopropene ( I -MCP) at 0.5 g m-3 for 611. Pretreatment with STS and 1-MCP significantly extended the vase life and minimized the % loss of initial weight of carnation and rose cut flowers comparing to the untreated control. The two chemicals applied inhibited the chlorophyll degradation and carbohydrate loss and hence, significantly improved the postharvest quality of carnation and rose cut flowers comparing to the control. Ethylene production by cut flowers was inhibited as a result of using these chemicals. In general, there were no differences between STS and (-MCP but the later does not have the heavy metal implications of STS treatment, and hence, using 1-MCP pretreatment for extending the vase life of carnation and rose cut flowers was recommended.

scholarly journals Improving the postproduction quality of Rose cut flowers

2004 ◽  
Vol 10 (4) ◽  
Author(s):  
F. Hassan ◽  
G. Schmidt ◽  
Zs. Dorogi
Keyword(s):  
Weight Loss ◽  
Chlorophyll Content ◽  
Chemical Treatment ◽  
Untreated Control ◽  
Production Quality ◽  
Rosa Hybrida ◽  
Vase Life ◽  
Cut Flowers ◽  
Silver Thiosulfate

In order to improve the post production quality of cut flowers of Rosa hybrida L. cv. Baroness, the effect of 8-hydroxyquinoline sulfate (8-HQS), silver thiosulfate (STS) and 1-methylcyclopropene ( I-MCP) were investigated. 8-HQS was used at 200 and 400 ppm with or without sucrose at 50 g LI. STS was used at 0.2, and 0.4 mM with or without sucrose at 50 g 1-I. l-MCP was used at 0.3, 0.5 and 0.7 g in-3 for 6h. The postproduction quality was improved as a result of using any chemical treatment comparing with untreated control. All the treatments of 8-HQS increased the vase life and minimized the percentage of weight loss of rose cut flowers compared to the control. The vase life was lorger when 8-HQS was combined with sucrose. The best treatment of 8-HQS was 400 ppm 8-HQS + 50 g 1-1 sucrose. STS treatment led to prolong the vase life and minimized the percentage of weight loss compared to the control. In addition, the effect was better when sucrose was added to STS. The treatment of STS at 0.4 mM + 50 g 1-1 sucrose was the best one. l -MCP treatment prolonged the vase life and lowered the percentage of weight loss at any level compared with untreated control. The best treatment in this concern was l -MCP at 0.5 g m-3 for 6h. The chlorophyll content (chl.a and chid)) of the leaves for the best treatment of each chemical was higher than the control. The treatment of STS at 0.4 mM + 50 g 1-1 sucrose gave the best results in this respect.

scholarly journals 24-Epibrasinolide Modulates the Vase Life of Lisianthus Cut Flowers by Modulating ACC Oxidase Enzyme Activity and Physiological Responses

Plants ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 995
Author(s):  
Mohammad Darvish ◽  
Habib Shirzad ◽  
Mohammadreza Asghari ◽  
Parviz Noruzi ◽  
Abolfazl Alirezalu ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Water Absorption ◽  
Ethylene Production ◽  
Oxidase Activity ◽  
Acc Oxidase ◽  
Postharvest Quality ◽  
Vase Life ◽  
Dependent Manner ◽  
Cut Flowers ◽  
Oxidase Enzyme

Ethylene is the most important factor playing roles in senescence and deterioration of harvested crops including cut flowers. Brassinosteroids (BRs), as natural phytohormones, have been reported to differently modulate ethylene production and related senescence processes in different crops. This study was carried out to determine the effects of different levels of 24-epibrassinolide (EBL) on ACC oxidase enzyme activity, the final enzyme in ethylene biosynthesis pathway, vase life, and senescence rate in lisianthus cut flowers. Harvested flowers were treated with EBL (at 0, 3, 6, and 9 µmol/L) and kept at 25 °C for 15 days. The ACC oxidase activity, water absorption, malondialdehyde (MDA) production and vase solution absorption rates, chlorophyll and anthocyanin contents, and the vase life of the flowers were evaluated during and at the end of storage. EBL at 3 µmol/L significantly (p ≤ 0.01) enhanced the flower vase life by decreasing the ACC oxidase activity, MDA production and senescence rates, and enhancing chlorophyll and anthocyanin biosynthesis and accumulation, relative water content, and vase solution absorption rates. By increasing the concentration, EBL negatively affected the flower vase life and postharvest quality probably via enhancing the ACC oxidase enzyme activity and subsequent ethylene production. EBL at 6 and 9 µmol/L and in a concentration dependent manner, enhanced the ACC oxidase activity and MDA production rate and decreased chlorophyll and anthocyanin accumulation and water absorption rate. The results indicate that the effects of brassinosteroids on ethylene production and physiology of lisianthus cut flowers is highly dose dependent.

scholarly journals Postharvest features of chrysanthemum cut flowers as affected by different chemicals

2004 ◽  
Vol 10 (1) ◽  
Author(s):  
F. Hassan ◽  
G. Schmidt
Keyword(s):  
Weight Loss ◽  
Chlorophyll Content ◽  
Untreated Control ◽  
Production Quality ◽  
Chrysanthemum Morifolium ◽  
Vase Life ◽  
Cut Flowers ◽  
Silver Thiosulfate ◽  
Post Production

Cut flowers of Chrysanthemum morifolium RAM cv. Suny Reagan were treated with different concentrations of 8- hydroxyquinoline sulfate (8-HQS), silver thiosulfate (STS) and 1-methylcyclopropene (1-MCP) in order to improve the post production quality. 8-HQS was used at 200 and 400 ppm with or without sucrose at 50 O. STS was used at 0.2, and 0.4 mM with or without sucrose at 50 g/1 1-MCP was used at 0.3, 0.5 and 0.7 g/m3 for 6h. All the treatments of 8-HQS prolonged the vase life and minimized the percentage of weight loss of chrysanthemum cut flowers compared to the control. The vase life was larger when sucrose not combined with 8-HQS. The best treatment of 8-1-IQS was 400 ppm 8-HQS without sucrose. STS treatment led to prolong the vase life and minimized the percentage of weight loss comparing to the control. In addition, the effect was better when sucroseas was added to STS. The treatment of STS at 0.4 mM + 50 g/I sucrose was the best one. 1-MCP treatment increased the vase life and lowered the percentage of weight loss at any level comparing with untreated control. The best treatment in this concern was 1-MCP at 0.5 g/m3 for 6h. The chlorophyll content (chl.a and chl.b) of the leaves for the best treatment of each chemical was higher than that of the control. The treatment of 1-MCP at 0.5 g/m3 6h gave the best results in this respect.

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.

Use of silver thiosulphate (STS) and 1-methylcyclopropene (1-MCP) to improve the shelf life of miniature potted rose cv. Amore

2005 ◽  
Vol 52 (4) ◽  
pp. 343-350 ◽  
Author(s):  
F. Hassan ◽  
G. Schmidt ◽  
J. Ankush ◽  
Z. Dorogi
Keyword(s):  
Heavy Metal ◽  
Shelf Life ◽  
Chlorophyll Content ◽  
Untreated Control ◽  
Rosa Hybrida ◽  
Postharvest Quality ◽  
Flower Senescence ◽  
Flower Longevity ◽  
Silver Thiosulphate

The quality of miniature potted roses during their shelf life is limited by bud abscission and premature flower senescence. Rosa hybrida L. cv. Amore plants were pretreated with silver thiosulphate (STS) at 0.2 and 0.4 mM and with 1-methylcyclopropene (1-MCP) at 0.3, 0.5 and 0.7 g m-3 for 6 h in order to investigate the effects of these chemicals on the postharvest quality. Both chemicals extended the flower longevity as well as the plant display life compared with the untreated control. The best treatments in this respect were STS at 0.4 mM and 1-MCP at 0.5 g-3 for 6 h, which resulted in the least degradation in the chlorophyll content of the leaves. The treatment with STS at 0.4 mM increased the flower longevity and plant display life by 1 and 1.67 days, respectively, compared with the 1-MCP pretreatment at 0.5 g m-3. Since 1-MCP treatment does not have the heavy metal implications of STS treatment, the use of 1-MCP pretreatment for extending the shelf life of miniature potted rose cv. Amore was recommended.

scholarly journals POSTHARVEST QUALITY OF ALSTROEMERIA CUT FLOWERS AFFECTED BY PREHARVEST SOIL AND AIR TEMPERATURE

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 617c-617
Author(s):  
Rik van Gorsel ◽  
A. Verlind ◽  
A. van de Wiel ◽  
G. van Leeuwen
Keyword(s):  
Root Zone ◽  
Postharvest Quality ◽  
Vase Life ◽  
Cut Flowers ◽  
Greenhouse Soil ◽  
Flower Production ◽  
Air Temperatures ◽  
Number Of Stems ◽  
Pretreatment Solution

Low root zone temperatures in summer stimulate generative development of Alstroemeria, resulting in a higher flower production in winter. The effects of greenhouse soil and air temperatures on vase life and ornamental value were evaluated. Preharvest treatments were two locations (field stations), four air temperatures (9, 12, 15, 18C), four root zone temperatures (11, 14, 17C, uncontrolled) and three varieties ('Flamengo', 'Jubilee', 'Wilhelmina') in a factorial design. The flowers were placed in a commercial pretreatment solution for 24 hours immediately after harvest. After a two day transport simulation and rehydration for 3 hours at 5C, flowers were kept at 1.5 W.m-2 PAR (12hr/day), 20C and 60% RH. The experiment was done three times. Results from the first harvest showed that lowering the soil temperature increased the number of stems that had two whirls of flowers opening after harvest. Average vase life was two weeks. Low air temperatures increased whirl opening as well, and increased vase life by one or two days. Ornamental value and number of flower branches per stem were not affected.

scholarly journals Effect of oxalic acid on vase life and antioxidative activities of ‘Mero Star’ cut lily flowers

2021 ◽  
pp. 56-61
Author(s):  
Hafiz Farooq Anwar ◽  
Hafiz Muhammad Shoaib Shah ◽  
Abdul Waheed ◽  
Mudassar Anwar Butt ◽  
Hafiz Zafar-ul-Qasim ◽  
...  
Keyword(s):  
Oxalic Acid ◽  
Electrolyte Leakage ◽  
Oxidative Enzymes ◽  
Postharvest Quality ◽  
Vase Life ◽  
Cut Flowers ◽  
Relative Water ◽  
Flower Diameter ◽  
Peroxidase Enzymes

Lily (Lilium L. hybrids) is sub-tropical cut flower that can be grown in open place or in green house and has consumer demand in local as well as in offshore markets. Short vase life, postharvest decay of flowering petals, activities of oxidative enzymes, malondialdehyde contents, electrolyte leakage and low water ratio are the main problems in marketing of cut lilies. This study was carried out to investigate the effect of oxalic acid (OA) treatments on vase life (12 days) and postharvest quality of ‘Mero Star’ cut lily flowers. The flowering stems were placed in 2, 4 and 6% aqueous solution of OA for 12 days at 20±2 °C with 70±5% relative humidity. Flowers placed in 6% OA solution exhibited longest vase life and flower diameter with higher relative water content and increased fresh weight and reduced flower decay. Reduced malondialdehyde contents and electrolyte leakage with higher activities of catalase, superoxide dismutase and peroxidase enzymes were also noted in 6% OA-treated flowers. In conclusion, exogenous postharvest application of 6% OA extended vase life and maintained postharvest quality of cut flowers by reducing electrolyte leakage and malondialdehyde contents with higher antioxidative enzymes activities.

scholarly journals Polyamines accentuate vase life by augmenting antioxidant system in cut spikes of Consolida ajacis (L.) Schur.

2021 ◽  
Vol 27 (4) ◽  
pp. 495-504
Author(s):  
Aehsan ul Haq ◽  
Sumira Farooq ◽  
Mohammad Lateef Lone ◽  
Shazia Parveen ◽  
Foziya Altaf ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Postharvest Quality ◽  
Flower Senescence ◽  
Vase Life ◽  
Distilled Water ◽  
Oxygen Species ◽  
Cut Flowers ◽  
Postharvest Senescence

Abstract Postharvest senescence is one of the crucial challenges limiting the marketability of cut flowers. Pertinently, recent investigations implicate extensive role of polyamines in regulation of flower senescence. The present study was envisaged to test the efficacy of poylamines in preserving the postharvest quality of Consolida ajacis (C. ajacis) cut spikes. The cut spikes of C. ajacis were subjected to various treatments of polyamines viz, 4 mM Spermine (SPM), 6mM Putrescine (PUT) and 6 mM Spermidine (SPD). A separate set of spikes held in distilled water represented the control. Our results authenticate a significant improvement in vase life of cut spikes of C. ajacis as compared to control. The increment in vase life was commensurate with the higher concentration of sugars, proteins and phenols in the tepal tissues. Polyamines amplified the activity of various antioxidant enzymes viz, superoxide dismutase (SOD), catalase (CAT) and ascorbate peroxidase (APX) to overcome the deleterious effects of reactive oxygen species (ROS). The membrane outflow of tepal tissues was profoundly reduced due to attenuated lipoxygenase (LOX) activity. These findings reveal conspicuous role of polyamines particularly SPM in modulation of flower senescence in cut spikes of C. ajacis.

scholarly journals Regulation of Petal Abscission in Pelargonium × domesticum

HortScience ◽  
1990 ◽  
Vol 25 (8) ◽  
pp. 937-940 ◽  
Author(s):  
C. Fred Deneke ◽  
Kathleen B. Evensen ◽  
Richard Craig
Keyword(s):  
Ethylene Production ◽  
Maximum Rate ◽  
Postharvest Quality ◽  
Silver Thiosulfate ◽  
Ethylene Sensitivity ◽  
Endogenous Ethylene ◽  
Low Levels ◽  
Exogenous Ethylene

The postharvest quality of regal pelargoniums [Pelargonium × domesticum L. H. Bailey] is limited by petal abscission. Cultivars that have diverse postharvest longevities were selected to study ethylene sensitivity and endogenous ethylene production. Petals of both intact and detached inflorescences abscised in response to low dosages of exogenous ethylene (0.5 μl·liter-1 for 1 hour). Ethylene sensitivity varied among cultivars and increased with floret age. Silver thiosulfate reduced ethylene sensitivity and often extended floret longevity beyond that of the controls. A climacteric-like rise in endogenous ethylene production occurred in excised gynoecia (including the receptacle) as floret age increased from 1 to 12 days postanthesis. Ethylene production increased a few days earlier and achieved a higher maximum rate in `Parisienne' than in `Virginia'; `Parisienne' also abscised petals earlier. Relatively low levels of endogenous ethylene may regulate petal abscission, since inflorescences were very sensitive to exogenous ethylene, and increased endogenous ethylene production preceded petal abscission.

Effects of ethylene and dehydration on cut flowering stems of Verticordia spp

1993 ◽  
Vol 33 (4) ◽  
pp. 489 ◽  
Author(s):  
DC Joyce ◽  
MC Poole
Keyword(s):  
Water Stress ◽  
Phosphonic Acid ◽  
Ethylene Production ◽  
Visual Quality ◽  
Leaf Abscission ◽  
Cut Flowers ◽  
Silver Thiosulfate ◽  
Early Loss ◽  
Flower Abscission

The potential for ethylene-induced abscission among Verticordia species used for cut flowers (V. nitens, V. chrysantha, V. plumosa, and V. densiflora) was studied by treating them with 2-chloroethyl-phosphonic acid (ethephon) or exposing them to dilute ethylene gas. The possibility that ethylene production induced by water stress may cause flower abscission was also investigated. Dipping in ethephon (500 or 1000 mg/L) failed to induce flower abscission in V chrysantha or V plumosa. Treatment with ethylene (8.6 pL/L) failed to induce flower abscission in V. densiflora. Ethephon and ethylene both induced substantial flower, pedicel, and leaf abscission in V. nitens. Pretreatment with silver thiosulfate prevented ethylene-induced flower abscission in V nitens. Dehydrating stems for periods of 6, 12, 24, or 48 h at about 20�C did not induce flower abscission in either V plunzosa or V nitens. Dehydration periods of 6 and 12 h had no effect on longevity. Longer drying periods (24 and 48 h) induced early loss in appearance (visual quality) of both species.

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