scholarly journals Postharvest Characteristics of cut Inflorescences of Lupinus havardii

1995 ◽  
Vol 5 (3) ◽  
pp. 247-249 ◽  
Author(s):  
Tim D. Davis ◽  
Wayne A. Mackay ◽  
Narendra Sankhla
Keyword(s):  
Geographic Range ◽  
Vase Life ◽  
Cut Flowers ◽  
Postharvest Storage ◽  
Breeding Lines ◽  
Silver Thiosulfate ◽  
Big Bend ◽  
Flower Abscission

Big Bend bluebonnet (Lupinus havardii Wats.) is native to a narrow geographic range in southwestern Texas and produces attractive blue inflorescences (racemes) that may be used as cut flowers. Several crops were produced in the greenhouse to determine postharvest-characteristics of the cut inflorescences. Without any postharvest conditioning treatments, the inflorescences held in water had an average vase life of about 7 days. During this period, an average of 13 flowers abscised per inflorescence. When preconditioned for 4 hours in 40 to 160 mg·liter−1 silver thiosulfate (STS), vase life increased to 10 to 12 days and fewer than three flowers abscised per inflorescence. A commercial floral preservative (Oasis) had no effect on flower abscission or vase life of STS-treated inflorescences. Flower abscission and vase life were the same whether STS-treated inflorescences were placed in floral foam moistened with water or in water alone. Storing STS-preconditioned inflorescences in water at 5C for 72 hours did not affect flower abscission or vase life compared to the unstored control. Dry postharvest storage at 5C for 72 hours caused noticeable wilting, but, on dehydration, these inflorescences still had a vase life of about 8 days. Postharvest characteristics of pink-and white-flowered breeding lines were the same as for the blue-flowered line. These results indicate that cut inflorescences of L. havardii have desirable postharvest qualities and can be stored for up to 72 hours without seriously limiting vase life.

scholarly journals 844 PB 488 POST-HARVEST CHARACTERISTICS OF CUT FLOWER SPIKBS OF LUPINUS HAVARDII

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 554c-554
Author(s):  
Tim D. Davis ◽  
Wayne A. Mackay ◽  
N. Sankhla
Keyword(s):  
Rio Grande ◽  
Geographical Range ◽  
Vase Life ◽  
Blue Flower ◽  
Cut Flower ◽  
Cut Flowers ◽  
Silver Thiosulfate ◽  
Post Harvest ◽  
Big Bend ◽  
Ethylene Inhibitor

Lupinus havardii (Big Bend bluebonnet) is native to a narrow geographical range along the Rio Grande River in southwest Texas and produces attractive blue flower spikes which have potential as cut flowers. Without any post-harvest treatments, these spikes had an average vaselife in water of about 7 d. During this period, an average of about 13 florets were abscised per spike. When preconditioned for 4 h in 40-80 mg/liter silver thiosulfate (STS), vaselife increased to 11 days and only 1-3 florets were abscised per spike. Post-harvest treatment of the spikes with 25-50 mg/liter oxime ether, a new ethylene inhibitor, surprisingly enhanced floret abscission and shortened vaselife. The basis for this response is not clear. Storage of STS-preconditioned spikes in water at 5C for 72 h only decreased vaselife by about one day compared to unstored controls. Dry post-harvest storage at 5C for 72 h caused severe wilting, but upon rehydration these spikes still had a vase/life of about 8 d. These results indicate mat cut flower spikes of L. havardii have good post-harvest qualities and can be stored for up to 3d without seriously limiting vaselife.

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.

scholarly journals First Report of Ovulariopsis on Lupinus havardii

Plant Disease ◽  
2000 ◽  
Vol 84 (4) ◽  
pp. 487-487
Author(s):  
S. P. Fernández-Pavía ◽  
M. Valenzuela-Vázquez
Keyword(s):  
Powdery Mildew ◽  
Infected Plant ◽  
Severe Infection ◽  
Disease Spread ◽  
Vase Life ◽  
Cut Flowers ◽  
Severe Problem ◽  
First Report ◽  
Big Bend ◽  
Close Proximity

In 1998 and 1999 a severe powdery mildew was observed in Las Cruces, NM, on Big Bend Bluebonnets (Lupinus havardii) grown in the greenhouse for cut flowers and vase life studies. An undescribed powdery mildew has been reported on L. havardii (2), but it has been observed only occasionally on leaves and has not cause a severe problem. The powdery mildew observed in Las Cruces began in March and caused severe infection from May through July. The disease spread rapidly due to movement of the pathogen during pruning operations and the close proximity of plants. Plants were heavily infected when no fungicide was applied. Plants were sprayed with the fungicide azoxystrobin, with best control obtained at 687 mg/liter of water. When an infected plant was used as a source of inoculum, disease spread rapidly to healthy plants placed around the infected plant. Infected leaves had chlorotic lesions that later became necrotic. Mycelia, conidiophores, and conidia of the pathogen were observed on leaves and occasionally on petioles and stems. Ellipsoid cylindrical-to-clavate conidia were hyaline, one-celled, and measured 49 to 68.1 μm × 12.2 to 14.7 μm. Conidia were produced on upright, simple conidiophores measuring 171 to 245 μm × 4.9 to 7.3 μm. Fibrosin bodies and cleistothecia were not found. The fungus was identified as an Ovulariopsis sp. (1). This is the first documented report of an Ovulariopsis sp. on L. havardii. References: (1) U. Braun. Beih. Nova Hedwigia 89:1, 1987. (2) W. A. Mackay and T. D. Davis. HortScience 33:348, 1998.

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.

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.

scholarly journals 347 1-MCP and CO2 Reduction of Ethylene Response on Snapdragon

HortScience ◽  
1999 ◽  
Vol 34 (3) ◽  
pp. 503B-503
Author(s):  
R. St.Hill ◽  
D.P. Murr
Keyword(s):  
Co2 Reduction ◽  
Vase Life ◽  
Rapid Decline ◽  
Ethylene Receptor ◽  
Cut Flowers ◽  
Ethylene Response ◽  
Receptor Sites ◽  
Limited Effectiveness ◽  
Ethylene Action ◽  
Flower Abscission

Recent advances in technology have made the snapdragon, Antirrhinum majus L., a promising florist crop in North America and potentially on the Ontario market. CO2 is a known inhibitor of ethylene action, but its effects tend to be difficult to interpret based on the variable responses of plants to this gas. Recently, a gaseous ethylene analog has been shown to inhibit certain ethylene responses of cut flowers, such as wilting in carnations and flower abscission of cut phlox. This cyclic olefin, 1-methylcyclopropene (1-MCP), is thought to bind irreversibly to the ethylene receptor sites, thereby preventing or delaying ethylene responses. In the experiments undertaken, the potential of CO2 and 1-MCP were investigated for their ability to enhance vase life and to reduce shattering and wilting of snapdragons. Flowers were sealed in ≈0.2-m3 chambers encased in 6-mil polyethylene and exposed to elevated CO2 (5% or 10%) or 1-MCP (20-200 nL/L) for 6 to 24 h at 20 °C. The flowers were then exposed to continuous ethylene of 0-20 μL/L. Following exposure to 5 or 20 μL/L ethylene, 1-MCP reduced shattering ≈2- to 3-fold compared to CO2 treatment. 1-MCP did not prevent the wilting response but delayed it by ≈2 days. CO2-treated flowers exhibited a more rapid decline in net percent open florets from days 3 to 5 post-treatment. Despite the ability of 1-MCP to reduce shattering, in the absence of exposure to continuous ethylene, it has limited effectiveness on wilting compared to CO2.

scholarly journals Postharvest Handling of Cut Heuchera sanguinea Engelm. Flowers: Effects of Sucrose and Silver Thiosulfate

HortScience ◽  
1998 ◽  
Vol 33 (4) ◽  
pp. 731-733 ◽  
Author(s):  
Susan S. Han
Keyword(s):  
Postharvest Quality ◽  
Vase Life ◽  
Flower Buds ◽  
Silver Thiosulfate ◽  
Postharvest Handling ◽  
Exogenous Ethylene ◽  
Flower Abscission

Postharvest quality of cut Heuchera sanguinea Engelm. `Splendens' and `Bressingham' was significantly improved and vase life significantly increased by pulsing the inflorescences with 4 mm silver thiosulfate (STS) for 4 hours followed by placing the stems in vase solutions containing 0.5% sucrose and 200 mg·L-1 8-hydroxyquinoline citrate. Under these conditions, nearly all of the buds (>92%) on inflorescences harvested with ≈2% to 3% open flowers developed to anthesis, in comparison with 26% to 28% of the controls. Sucrose concentrations higher than 1% were detrimental and resulted in stem toppling. Treatment with 4 mm STS for 4 hours delayed bud and flower abscission, but longer treatment times resulted in blackening and shriveling of the flower buds. With the absence of sucrose in the vase solutions, flower buds on STS-treated inflorescences did not continue to develop. Ethylene is probably involved in the natural senescence of the flower buds, since exogenous ethylene induced rapid flower abscission, and senescence was delayed by treatment with STS.

scholarly journals Vase life consequences of natural and chemical treatments in foxtail lily (Eremurus spectabilis), as a specialty cut flowers

2022 ◽  
Vol 28 (1) ◽  
pp. 120-129
Author(s):  
Yeganeh Basiri ◽  
Nematollah Etemadi ◽  
Mahdi Alizadeh ◽  
Ali Nikbakht ◽  
Ghodratollah Saeidi
Keyword(s):  
Methyl Jasmonate ◽  
Flower Senescence ◽  
Vase Life ◽  
Cut Flowers ◽  
Silver Thiosulfate ◽  
Nano Silver ◽  
Chemical Treatments ◽  
Balance Loss ◽  
Solution Uptake

Abstract Eremurus spectabilis is a new, commercially valuable specialty cut flower, but little is known about the applicable treatments to extend the vase-life and maintaining the ornamental quality of this flower. Therefore, the present study was aimed at investigating the impacts of nano-silver, essential oils, and chemical treatments on keeping ornamental quality and vase-life of cut inflorescences of Foxtail lily. The cut inflorescences were placed in different vase solutions containing salicylic acid (100 and 200 mg L-1), methyl jasmonate (25 and 50 mg L-1), silver thiosulfate (0.1 mM) plus isothiazolinone (0.001 and 0.005 mL L-1), nano-silver (5, 10, and 15 mg L-1), thymol (75 and 120 mg L-1), and menthol (75 and 120 mg L-1), which were applied as continuous and pulsing methods. According to the results, all treatments considerably improved the post-harvest performance of Foxtail lily cut flowers. Although there were no significant differences among nano-silver (NS) treatments, the cut inflorescences kept in vase solution containing 10 mg L-1 of NS exhibited the longest vase life (~14 days) and the best ornamental quality. Nano-silver treatment followed by silver-thiosulfate significantly improved solution uptake by flowering inflorescences, thereby delaying the water balance loss and keeping relative fresh weight. Furthermore, 50 mg L-1 methyl jasmonate- and 75 mg L-1 menthol-treated cut inflorescences exhibited significantly higher vase-life longevity by ~ 6 and 4 days, total soluble solutes by 28.38% and 19.12%, and solution uptake rate by 76.46% and 140.6%, respectively, as compared to control. Overall, 10 mg L-1 NS can be recommended as a commercial preservative solution to delay flower senescence and improve the vase life and keeping the quality of foxtail cut inflorescence.

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 Sucrose and Ethylene Biosynthesis/Perception Inhibitors Additively Enhance Postharvest Display Life of Cut Racemes of Lupinus havardii Wats.

HortScience ◽  
2004 ◽  
Vol 39 (4) ◽  
pp. 823C-823
Author(s):  
Wayne Mackay* ◽  
Narendra Sankhla ◽  
Tim Davis
Keyword(s):  
Sucrose Concentration ◽  
Phenotypic Selection ◽  
Ethylene Biosynthesis ◽  
Vase Life ◽  
Cut Flower ◽  
Big Bend ◽  
Biosynthesis Inhibitors ◽  
Postharvest Longevity ◽  
And Performance ◽  
Flower Abscission

Over the years, by recurrent phenotypic selection, breeding and evaluation, we have developed blue, white, and pink flowered lines of Big Bend bluebonnet (L. havardii Wats.). The racemes, which differ in their sensitivity to ethylene, hold promise as a new specialty cut flower crop. The key determinants of postharvest longevity and performance of cut racemes are flower abscission and senescence. Our studies indicated that the addition of sucrose in the holding solution greatly enhanced the vase life, although the optimum sucrose concentration varied considerably in different lines. In blue flowered lines (e.g., `Texas Sapphire', Blue Select) sucrose concentration greater than 2% induced `osmotic wilting' followed by senescence of the standard petal (banner spot petal), while the petals in white flowered lines (e.g., `Texas Ice', White Select) did not show any wilting even in 4% to 6% sucrose. Ethylene perception inhibitors such as 1-MCP or STS completely suppressed the induction of flower abscission in racemes of all the bluebonnet lines. Ethylene biosynthesis inhibitors (e.g., ReTain, CO++), on the other hand, were relatively less effective than 1-MCP/STS. Both ethylene perception as well as biosynthesis inhibitors, in combination with sucrose, acted additively and further enhanced the postharvest performance by delaying flower abscission/senescence.

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