Involvement of ethylene in postharvest senescence of Boronia heterophylla flowers

1999 ◽  
Vol 39 (7) ◽  
pp. 911 ◽  
Author(s):  
A. J. Macnish ◽  
P. J. Hofman ◽  
D. C. Joyce ◽  
D. H. Simons
Keyword(s):  
Ethylene Production ◽  
Flower Senescence ◽  
Vase Life ◽  
Fresh Weight ◽  
Endogenous Ethylene ◽  
Pre Treatment ◽  
Postharvest Senescence

Summary. Treatment of cut flowering Boronia heterophylla (red boronia) stems with 10 L ethylene/L for 72 h at 20°C induced flower senescence and abscission, and thereby reduced stem fresh weight and vase life. Pre-treatment with 1-methylcyclopropene (1-MCP) reduced these ethylene effects. Treatment of B. heterophylla with 10 L ethylene/L for a shorter 12 h period at 20°C did not affect vase life. Rates of endogenous ethylene production by B. heterophylla flowers increased in association with wilting during flower senescence.

scholarly journals Postharvest physiology of cut flowers

2021 ◽  
Author(s):  
Lucas Cavalcante da Costa ◽  
Fernanda Ferreira de Araujo ◽  
Wellington Souto Ribeiro ◽  
Mirelle Nayana de Sousa Santos ◽  
Fernando Luiz Finger
Keyword(s):  
Ethylene Production ◽  
Respiratory Activity ◽  
Carbon Dioxide Concentration ◽  
Ethylene Biosynthesis ◽  
Flower Senescence ◽  
Vase Life ◽  
Cut Flowers ◽  
Wide Range ◽  
Ethylene Action ◽  
And Control

Abstract The longevity of cut flowers is limited by their ephemeral nature and by multiple stresses. Impairment in water uptake, depletion of stored carbohydrates, increases in both respiratory activity and ethylene production are signatures of flower senescence. A wide range of techniques is available to extend flower preservation, including the use of flower preservative solutions, ethylene action inhibitors, growth regulators, and control of temperature and flower dehydration. The use of sucrose in pulsing solution, or as a component of vase solution, extends the vase life of flowers by either improving water balance and energy or delaying the senescence via reductions in ethylene biosynthesis. Inhibitors of ethylene production and action affect the longevity by extending the vase life of some ethylene-sensitive flowers. Flowers have intense respiratory activity, which may deplete the limited reserves of carbohydrates in the tissues. Lower temperatures markedly reduce both carbon dioxide concentration and ethylene production as well as its action. However, chilling-sensitive flowers, such as bird-of-paradise, heliconia, orchid, and ginger, cannot be stored below 10 to 13°C due to the intense development of tissue discoloration.

scholarly journals Postharvest Dip in a Natural Lipid, Lysophosphatidylethanolamine, May Prolong Vase Life of Snapdragon Flowers

HortScience ◽  
1997 ◽  
Vol 32 (5) ◽  
pp. 888-890 ◽  
Author(s):  
Navjot Kaur ◽  
Jiwan P. Palta
Keyword(s):  
Mass Loss ◽  
Ethylene Production ◽  
Deionized Water ◽  
Fresh Mass ◽  
Antirrhinum Majus ◽  
Vase Life ◽  
Ion Leakage ◽  
Commercial Potential ◽  
Endogenous Ethylene ◽  
Natural Lipid

We investigated the use of lysophosphatidylethanolamine (LPE) for prolonging vase life of snapdragon (Antirrhinum majus L.). Freshly cut snapdragon spikes were set into a LPE solution at 25 mg·L-1 for 24 h and then transferred to deionized water. The vase life was enhanced by LPE. The flowers on spikes treated with LPE showed symptoms of wilting or browning 4 or 6 days later than those on the spikes given deionized water in inbred or `Potomac White', respectively. All the spikes were of marketable quality for 5 to 7 days after harvest when treated with LPE, whereas in the control only about half of the flowers were of marketable quality at 2 days after harvest. LPE treatment also delayed fresh mass loss, lowered endogenous ethylene production, and reduced ion leakage. These results suggest that LPE has commercial potential in enhancing vase life of snapdragons.

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 Senescence Symptoms after Emasculation Vary among Cymbidium Cultivars

HortScience ◽  
1998 ◽  
Vol 33 (4) ◽  
pp. 734-735 ◽  
Author(s):  
Jung Nam Suh ◽  
Kiyoshi Ohkawa ◽  
Beyoung Hwa Kwack
Keyword(s):  
Ethylene Production ◽  
Oxidase Activity ◽  
Acc Oxidase ◽  
Cultivar Differences ◽  
Vase Life ◽  
Fresh Weight ◽  
Before And After

Response of cut Cymbidium flowers to emasculation was investigated. All Cymbidium cultivars that we examined produced ethylene during senescence. There were marked cultivar differences in the changes of fresh weight, ethylene production, and lip coloration after emasculation. In the case of `Venus', flower emasculation did not alter fresh weight, ethylene production, or lip coloration. There were differences in ACC oxidase in vivo activity among the three cultivars before and after emasculation. There was a correlation between the initial ACC oxidase activity and time to lip coloration in the emasculated flowers, but not in control flowers. It was suggested that the initial ACC oxidase activity of the column may be related to flower response to emasculation rather than vase life during senescence.

scholarly journals Prolonging the Vase Life of Snapdragons and Carnations with a Natural Lipid, Lysophosphatidylethanolamine (LPE)

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 636f-637 ◽  
Author(s):  
Navjot Kaur ◽  
Jiwan P. Palta
Keyword(s):  
Ethylene Production ◽  
Early Stage ◽  
Membrane Integrity ◽  
Dianthus Caryophyllus ◽  
Stage Iv ◽  
Deionized Water ◽  
Vase Life ◽  
Ion Leakage ◽  
Fresh Weight ◽  
Flower Opening

Freshly cut snapdragon (Antirrhinum majus L) spikes or carnation (Dianthus caryophyllus L cv. White Sim) stems were put in LPE (10 ppm for carnation, 25 ppm for snapdragon) solution for 24 hours and then transferred to deionized water. Parallel controls were kept continuously in deionized water. Snapdragon spikes were harvested when they had one-third of the florets opened which is a standard commercial practice. The carnations used in the experiment were harvested at three different stages of flower development starting from open brush bud stage (Stage IV) to fully opened (Stage VII, petals 45(to the stem) flower. LPE treatment delayed senescence in snapdragon by four days. Furthermore, it enhanced the opening of floral buds and opened all the florets on every spike. LPE treatment also significantly delayed loss in fresh weight of spikes associated with senescence, lowered the endogenous ethylene production and reduced ion leakage from florets. LPE had a similar effect on fresh weight and ion leakage from carnations if it was applied at an early stage of flower opening. Older carnations (Stage VII) were found unresponsive to LPE. In conclusion, LPE has the potential in enhancing the vase life of snapdragons and carnations. Carnations must be harvested at the open brush bud stage for effective LPE application. Our results suggest that LPE is prolonging vase life of cut flowers by reducing ethylene production and maintaining membrane integrity.

scholarly journals Study to extend the vase life of cut rose (Rosa hybrida L.) flowers

2016 ◽  
Vol 19 (2) ◽  
pp. 48-57
Author(s):  
Hong Thi Hoa Tran ◽  
Viet Trang Bui
Keyword(s):  
Water Uptake ◽  
Dry Weight ◽  
Flower Senescence ◽  
Vase Life ◽  
Ionic Conductance ◽  
Distilled Water ◽  
Fresh Weight ◽  
Rate Of Photosynthesis ◽  
Two Peaks ◽  
Cut Rose

This study investigated anatomic and physiologic changes during senescence to improve the vase life of cut rose flowers. When holding the flowers in the distilled water, the fresh weight increased in the 2nd day, and decreased in the following days. In progressing flower senescence, there were decreases in water uptake, dry weight, rate of photosynthesis, and concentration of auxin, gibberellin and zeatin, while the ionic conductance, and ABA concentration increased. The rate of respiration increased until the 3rd day, and then decreased. The UV absorption curve of the petal extract showed two peaks at 446 and 665 nm. The absorbances was the highest in the 1st day then decreased in the following days. Among the treatments, the combination of 10 mg/L BA, 1 mg/L GA3 and 0.1 mg/L NAA, and the combination of 10 mg/L BA and 0.1 mg/L NAA gave a vase life for cut roses 2 days longer than that of the control.

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.

A comparison of preharvest and postharvest ethylene production and respiration rates of saskatoon (Amelanchier alnifolia Nutt.) fruit during development

1999 ◽  
Vol 77 (3) ◽  
pp. 323-332
Author(s):  
Suzy Y Rogiers ◽  
N Richard Knowles
Keyword(s):  
Ethylene Production ◽  
Color Change ◽  
Wound Response ◽  
Weight Basis ◽  
Continuous Treatment ◽  
Fresh Weight ◽  
Fresh Weight Basis ◽  
Amelanchier Alnifolia ◽  
Respiration Rates ◽  
Maturity Class

Changes in respiration and ethylene production rates of nine maturity classes of saskatoon (Amelanchier alnifolia, Nutt.) fruit after harvest were compared with those of fruit maturing and ripening on the plant. During ripening on the plant, ethylene production increased on a whole-fruit and fresh-weight basis, while respiration increased substantially on a whole-fruit basis but remained constant on a fresh-weight basis. Fruit harvested at the greenish yellow to pink stages (maturity classes four and five, respectively) increased their ethylene production until 15-20 h after harvest, and this was coincident with ripening to maturity class seven and thus a color change to red. Ethylene production then declined over the next 15 h. Respiration rates of harvested immature, mature, and ripe fruits declined over 5 days, except for a relatively brief 8-12% rise starting 15-20 h after harvest. This brief increase in respiration was characteristic of fruit of all maturity classes, likely reflecting a wound response associated with harvest rather than a ripening-induced change in metabolism. Continuous treatment of attached or detached fruit with propylene or ethylene in an open airflow system did not induce an increase in respiration earlier, relative to control fruit. The respiratory response of saskatoon fruit during postharvest ripening was thus very different from that of fruit that ripened on the plant. Thus, the increase in respiration associated with ripening could only be demonstrated on a whole-fruit basis if fruit remained on the plant. Preharvest and postharvest changes in ethylene production during ripening also differed but were both consistent with climacteric ripening.Key words: Amelanchier alnifolia, ethylene, ripening, saskatoon fruit.

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