Flowers Cv Research Articles

Polypropylene Packaged Ten Days Cold Stored Rose Cut Flowers cv. Bordeaux Influenced by Different Pulsing Solution

The study included different pulsing solution viz., water, HQC 200mg/l, sucrose 50g/l + HQC 200 mg/l, citric acid 200mg/l, α-lipoic acid 200mg/l, GA3 100 mg/l and BA 100mg/l to study the effect on flower quality and vase life of PP (polypropylene) packaged cold storage (at 2°C) rose cv. Bordeaux, for the period of 10 days. Pre-storage pulsing of GA3 100mg/l solution treatment showed highly promising results in extending flowers vase life along with maintained flower quality just after storage and at 4th DAS in vase life. Further, GA3 100mg/l solution treatment recorded significantly higher water up take (175.65 ml), change in fresh weight (10.50%) at 4th DAS, total dissolve solids (8.85 °brix, 8.05 °brix and 6.75 °brix) and membrane stability index (81.97 %, 65.97 % and 37.88 %) at 2nd, 4th and 6th DAS. Moreover, it was evident from the results that same treatment recoded significantly higher total soluble sugar (59.65 mg/g fresh weight), Estimated protein (18.79 mg/g fresh weight), catalase activity (20.42 µ mol H2O2 min-1 g-1 protein), peroxidation activity (40.30 µ mol H2O2 min-1 g-1 protein), pigment content (15.82 mg/g fresh weight) anthocyanin content in the petals at 4th DAS. Whereas, GA3 100 mg/l pulsing solution treated PP packaged cold stored rose cut flowers cv. Bordeaux recorded significantly higher vase life (6.88 days) which was at par with treatment P2 (Sucrose 50 g/l + HQC 200 mg/l).

The role of supplemental lighting during late fall and winter on photosynthetic and non-photosynthetic pigments biosynthesis of cut rose flower (Rosa hybrida cv. ‘Dolce Vita’)

ABSTRACT Low levels of natural light within the late fall and winter periods are main restricting factors for greenhouse-cut rose flower production in northern countries. Here, the effects of supplemental lighting on photosynthetic and non-photosynthetic pigments and the morphological response of cut rose flower cv. ‘Dolce Vita’ were investigated. Four different supplemental lighting regimes, including 85, 170, 255, and 340 μmol·m−2·s−1 PPFD using a high-pressure sodium lamp for a six-hour day extension started at sunset were applied to rose plants during late fall and winter. With increasing light intensity to 255 μmol·m−2·s−1 PPFD, the content of chlorophyll a, total chlorophyll, carotenoid content, and the ratio of chlorophylls a/b as well as amount of anthocyanins greatly improved. The highest phenol content and total antioxidant capacity was observed in 170 μmol·m−2·s−1 PPFD. Moreover, extending of daylength by light intensity of 255 μmol·m−2·s−1 PPFD had a significant affirmative effect on traits of growth, including flower stem length (P < 0.01), leaf number (P < 0.05), renewal bud formation (P < 0.05), time of harvesting (P < 0.05), and vase life of cut flowers (P < 0.01). Considering physiological and morphological improvement, extending of daylength from 10-h to 16-h by supplemental light of 255 μmol·m−2·s−1 PPFD would be the best choice to cultivate cut rose flower cv. ‘Dolce Vita’.

A study on the effect of silver nitrate and 8-hydroxyquinoline citrate pulsing solutions on Lilium cut flowers

Lilium is one of the most important cut flowers in commercial markets, giving customers ornamental value. Fresh flowers, a highly perishable item, need more care and proper treatment for their longer post-harvest life and due to this, the end users face the post-harvest losses of cut flowers. Such losses can be minimized by using preservative chemical, which plays an important role in increasing the vase life of flowers. To increase the post-harvest life of lilium cut flowers cv. ‘Pavia’, the present investigation was aimed to study the effect of different combinations and concentrations of silver nitrate at 50, 75 and 100 ppm and 8-hydroquinoline citrate at 100, 150 and 200 ppm pulsing solutions with 20 % sucrose. Three replications were completely randomised with 16 treatments and one control. Silver nitrate showed better results in flower bud opening, flower bud opening to complete flowering, flower size, bloom life, dry weight and dry matter percentage. Among the treatment concentrations, AgNO3 at 50 ppm with 20% sucrose showed the most effective result on enhancing the selected parameters and improved flower quality during post-harvest life. Among the treatment combinations, 8-HQC at 100 ppm + AgNO3 at 75 ppm with 20 % sucrose showed better results. These findings will be useful to researchers, farmers, and end users to retain the ornamental value of lilium cut flowers for longer than usual.

Response of preservative chemicals on the shelf life of cut lilium (Lilium spp.) flower cv. ‘Pavia’

Lilium cut flowers have commercial importance and extending their vase life is vital. An increase in the vase life quality and quantity can directly increase the viability and price realization of commercially important flowers like lilium. Shelf life of cut lilium flower is influenced by using different preservative chemicals and sucrose added in vase solution. Such an extension of vase life can be achieved via chemical treatment. The trial was carried out to examine the effect of various concentration of two chemicals, AgNO3 (silver nitrate) and 8-HQC (8-Hydroxyquinoline citrate) along with sucrose on the shelf life of lilium cut flower cv. ‘Pavia’ (cross between Asiatic and Longiflorum lilies). In the experiment, sucrose (20%), 8-HQC at 3 concentrations (100, 150, 200 ppm) and AgNO3 at 3 concentrations (50, 75, 100 ppm) and water (distilled) as control were tested alone and with combinations. Cut flowers of lilium were treated at one bud opening stage. The trial was carried out in a completely randomized design (CRD) having 16 treatments and one control in three (3) replications. The fresh weight and relative fresh weight of the cut flower spike, opening of all flowers on a spike, vase solution uptake on a day, total vase solution uptake and vase life of lilium cut flower spike showed the best outcome with AgNO3 (50 ppm) and 20% sucrose treatment combination. Out of the two chemicals, silver nitrate showed better results than 8-HQC as a preservative in enhancing the shelf life of cut Lilium flower cv. ‘Pavia’. Analysis of this new and exciting method will be useful to research institutes, commercial producers, wholesalers, retailers, consumers or anyone to choose right chemical and concentration of holding solution to maximize the post-harvest life of lilium cut flowers.

Physiological, biochemical, and postharvest characteristics of two cut rose cultivars are regulated by various supplemental light sources

Light is not only a photosynthetic energy source for biochemically plant cellular accumulation but also the most important signaling messenger for plant growth, development, and environmental adaptations, influencing the postharvest quality and longevity. In this study, to optimize the biochemical and physiological responses of cut rose flowers cv. ‘Jumilia’ and ‘Samurai’ to the different light quality provided by metal halide (MH), high pressure sodium (HPS), and light-emitting diode (LED) lamps and two light intensities of LED (75 and 150 μmol m−2 s−1 PPFD) on the postharvest life. The results showed that flower water content, as well as total carbohydrate, anthocyanin, and carotenoid content, were significantly induced by LED irradiation, but didn't influence the starch content of cut roses. Furthermore, MH and HPS lighting changed the osmotic potential, decreased the membrane stability index, and consequently increased the color change after harvest, resulting in shorter postharvest life of cut roses comparing to the LED environment. More specifically, plants produced by LED lighting reached higher activity of phenylalanine ammonia-lyase (PAL) enzymes and the following higher lignin concentration. LED-exposed rose flowers showed an increase in antioxidant activity and limitation of lipid peroxidation and hydrogen peroxide but were not effective in ascorbate peroxidases (APX) enzyme activity of cut rose flowers. Overall, LED irradiation delayed the senescence of postharvest cut roses mainly by inducting protein biosynthesis, activating the enzymatic system, and inhibiting microbial proliferation. These results suggest that the spectral quality of lighting altered biochemical function, cell wall lignification, and antioxidative defense mechanisms that affect postharvest attributes in roses.

A aplicação de película natural melhora a conservação de flores de corte de cravos

ABSTRACT Carnation (Dianthus caryophyllus) is one of the most important and popular cut flowers for the ornamental industry. However, it has a short decorative life, being water loss one of the main challenges. Water loss leads the petals to wither with a consequent loss of its commercial value. One of the techniques used in postharvest technology is the use of coatings and films, which interfere in gas exchange and water loss, maintaining the quality of cut flowers. The current study investigated the effects of a natural coating based on hydroxypropyl methylcellulose (HPMC) at 5% and beeswax (BW) in cut carnation flower cv. Delphi stored at 20°C and 70% RH. The application of HPMC + 40% BW treatment in flowers resulted in 30% higher fresh weight, 17% higher relative water content (RWC) and 80% higher flower opening compared to untreated flowers. The shelf life of untreated and HPMC + 40% BW carnations was 7 and 12 days, respectively, allowing a shelf-life extension of up to five days.

Effects of Plant Growth Regulators on Quality, Quantity and Vase-life of Rose flower (Rosa hybrida cv. Avalanche)

An experiment was conducted to find the appropriate material for increasing the quantitative and qualitative traits in the pre, and postharvest vase-life of the cut rose flower cv. “Avalanche” in a hydroponic greenhouse based on a randomized complete block design (RCBD) with 16 treatments and 3 replications. Treatments included gibberellic acid at four levels (0, 100, 200, and 300 ppm) and salicylic acid at four levels (0, 100, 150, and 200 ppm). The foliar application was carried out before harvest in tree time at intervals of 10 days. The results showed that the treatments had a significant effect on qualitative, quantitative, and vase life. The highest stem diameter (6.08 mm), flower length (55.90 mm), and the number of branches per plant (6.53 branches per plant) was obtained from T4 (300 ppm gibberellic acid). The highest vase life (7 days) was recorded in T5 (150 ppm salicylic acid), with more water absorption and a higher relative fresh weight. T3 (200 ppm gibberellic acid) had a maximum flower diameter (36.33 mm), and T16 (200 ppm salicylic acid + 300 ppm gibberellic acid) had the longest stem length (74.37 cm). The desired growth regulators in different concentrations were able to increase the quantitative, qualitative, and vase life of the rose flower.

Impact of Some Floral Preservatives on Gerbera Cut Flowers cv. Rosalin Characteristics

Impact of Some Floral Preservatives on Gerbera Cut Flowers cv. Rosalin Characteristics

Phenology and growth flower of Dianthus caryophyllus L. cv. ‘MOON LIGHT’ under greenhouse

Carnation crop in Colombia is one of the main income generating activities in Colombian floriculture. However, the growth dynamics and its relationship with thermal time are unknown. For this reason, the objective of this research was to determine the growth and development of carnation (Dianthus caryophyllus L.) cv. ‘Moon Light’ in thermal time when grown in a greenhouse in Bogotá savanna. This research was developed based on the phenological stages and accumulation of Growing Degree Days (GDD). Fresh and dry weight accumulation is fitted to a logistic model that generated a sigmoid type curve. The carnation flower cv. 'Moon light' presented a constant accumulation of dry weight from 15.3 GDD (stage 0 rice) to 777.6 GDD (cut point). The Absolute Growth Rate (AGR) increased slowly during phase I. It presents a rapid and constant gain until reaching the cut-off point with a value of 0.035 g per GDC and an accumulation of 777.6 GDC. The Relative Growth Rate (RGR) presented a continuous decrease with an initial value of 0.0049 g g-1 per GDD in the bullet stage and a value of 0.0024 g g-1 per GDD at the cut-off point. Through the results obtained, the floriculture sector will have a technical tool within the productive projection of the carnation variety 'Moon Light' grown in a greenhouse.

Melatonin as a new postharvest treatment for increasing cut carnation (Dianthus caryophyllus L.) vase life

The marketability of cut flowers is directly affected by their vase life, which determines acceptability for commercial purposes. In carnations and other species of cut flowers, corolla is one of the most affected parts during flower senescence due to the petal withering which is accelerated by metabolic processes occurring after separation from the mother plant. Melatonin (MT) is a compound with antioxidant properties, naturally present in plant tissues that plays important roles in the regulation of different metabolic processes. In this research work the effect of different MT concentrations (0.01, 0.1 and 1 mM) on the vase life of cut carnations flowers cv. Baltico was evaluated. The greatest delay in senescence was observed with 0.1 mM MT concentration, increasing vase life up to 10 days more as compared to control carnations. Although all MT concentrations assayed significantly (P < 0.05) maintained initial levels of fresh weight, membrane stability index, bioactive compounds and antioxidant activity for longer time, the lowest concentrations were those that had the most relevant impact on vase life. The highest dose evaluated (1 mM) maintained all the parameters evaluated but showed the wilting symptoms earlier. For this reason, 0.1 MT concentration could be a tool capable of improving carnation vase life for longer time, increasing the commercial potential of this cut flower.

Influence of six surface coatings on quality and storability of dehydrated Dutch rose flowers cv. Taj Mahal

Influence of six surface coatings on quality and storability of dehydrated Dutch rose flowers cv. Taj Mahal

Nanosilver/hydrogel: Synthesis and application in delaying senescence of cut flower

The superabsorbent Aquasorb hydrogel enriched with silver ion solutions was exerted with sodium borohydride (NaBH4) and glucose/ sodium hydroxide (NaOH) in various concentrations as reducing agents. Scanning electron microscopy (SEM), and transmission electron microscopy (TEM) images confirmed the presence of silver nanoparticles (SN) in the amorphous structure of hydrogel. The results showed that the swelling of hydrogel increased by glucose (5 mM) / sodium hydroxide (10 mM) 298.5 g water/g hydrogel, while atomic absorption analysis showed that the amount of SN (0. 1054 mg/ mg hydrogel) was in the reduced sample by glucose (10 mM)/ sodium hydroxide (10 mM). The highest antibacterial activity on Escherichia coli and Bacillus cereus was observed in reduced samples by NaBH4. Then the efficacy of this sample containing SN 1–3 nm sized particles (50 mg L−1) was evaluated in the preservative solution of rose cut flower cv. ‘Red Alert’. The results indicated positive effects of hydrogel enriched with silver nanoparticles on relative fresh water, membrane stability index, and the vase life extended (14.26 days) in cut flowers, and did not result in any evident toxic effects, so that the highest chlorophyll content was observed in the hydrogel containing silver nanoparticles (86.4%). The results indicated that the expression level of two senescence-associated genes (RhAA and RhCG) were decreased in rose petals, and the RhCTR1 as a negative regulator in the ethylene signaling pathway was induced at higher levels in the hydrogel- containing SN treatment. As our findings showed, the nanocomposite hydrogel containing silver nanoparticles can be used to control the toxicity of SN in the preservative solution with higher efficiency, and the ability to use multiple times for senescence delay in the cut flowers industry.

Evaluation of an integration between the nanosized zinc oxide and two cultivars for the control of dampingoff disease in sunflower crop

Damping-off disease, caused by Rhizoctonia solani, leads to severe worldwide economic losses in many important crops. The current strategies to control this disease are inadequate. This study addresses the possibility of using ZnO nanoparticles (NPs) and two cultivars of sunflower to be employed in control strategies. The ZnO NPs were significantly (P=0.01) more inhibitory to R. solani growth at high concentrations than lower treatments indicating a dose-dependent effect. This effect was found to be fungistatic when fungal inoculum was transferred to standard medium after challenging with the ZnO NPs. Additionally, the two cultivars of sunflower tested were found to be susceptible to pathogen R. solani showing a high percentage of damping-off incidence and severity of symptoms. Although, most treatments of ZnO nanoparticles applied did not significantly reduce the damping-off incidence, the disease severity was significantly reduced. This was particularly clear when the seedlings of the two sunflower cultivars were sprayed with ZnO NPs two days prior to planting the best suppression ranging from 100 to 53.12% in Euro flower cv. and from 95.31 to 54.68% in Flame cv. The reported findings in this study suggest that the application of the ZnO NPs together with current control approaches could improve the health of field grown sunflower crops and therefore the overall yield.

HPLC determination of Ursolic acid in flowers of an Iranian Pomegranate (Punica granatum L.) Cultivar

Ursolic acid (UA), is a major bioactive compound in several traditional medicinal plants including pomegranate (Punica granatum L.) flower. This study presents the HPLC analysis of UA content in flowers of an Iranian pomegranate cultivar. The analytical method’s accuracy and the repeatability were satisfactory. The Linear ranges were 100-400 µg/ml for UA with a good correlation. On the average, the recovery rate of UA was 100%. Here, the extraction of UA from an Iranian pomegranate flower cultivar by employing an ultrasound-assisted extraction method was reported, and several extraction solvents were studied to improve extraction yield of UA. Remarkable quantities of UA were found in cultivar of pomegranate flower evaluated. Our results showed that Iranian pomegranate flower cv. Ghorj Tafti Torsh is a good source for extraction and isolation of UA.&#x0D;

Impact of GA3 and spermine on postharvest quality of anthurium cut flowers (Anthurium andraeanum) cv. Arizona

Abstract Anthurium cut flowers exposed to low temperatures may be subjected to chilling injury, whereas higher temperatures may accelerate their metabolism and induce premature senescence. Plant growth regulators, as gibberellic acid (GA3) and spermine (SPM), have been described to extend the postharvest life of flowers. In this study, both compounds were applied by spraying or pulsing in anthurium cv. Arizona before storage at 20 °C. The solutions were constituted of 144 μM GA3 and 2 μM SPM, which were used separately or in combination, and analyzed for 12 d. Spraying with GA3 + SPM extended the vase life and kept the commercial quality. These treatments increase the phenols content, as well as, the activity of polyphenol oxidase (PPO), peroxidase (POD), and superoxide dismutase (SOD). Spadix sprayed with GA3 or SPM retained high amounts of spermidine (SPD), and in the combination of GA3 + SPM, there were higher contents of spermidine. These results suggest that the application of GA3 + SPM by spraying can be used to reduce the senescence in anthurium cut flowers stored at 20 °C, and improve the commercial quality of the inflorescences.

Effect of Embedding Materials in the Drying Process of Rose cv. Valencia

Freshly harvested, semi opened rose flowers cv. Valencia were dried with different embedding materials viz. silica gel, borax and fine sand. These embedding materials were used alone, or in combination as mixture of equal proportions of silica gel and borax (50:50); silica gel and sand(50:50); sand and borax (50:50); and were subjected to drying under ambient conditions. Different parameters were recorded such as loss in weight, petal shrinkage, sensory evaluations of colour, texture, shape, overall acceptability and also drying time. The results revealed that among the different embedding materials tried, flowers dried in silica gel has the highest moisture loss, highest score in sensory characters and also took the shortest time for drying.

Response of cut rose cv. cardinal to sucrose and NaOCl concentration

To find the response of cut rose cv. Cardinal to sucrose and NaOCl concentration, an experiment was conducted with normal day light under room condition and natural ventilation. Completely Randomized Design (CRD) was used for the experiment by replicating 3 times. Solutions of different combination of Sucrose levels of 0, 4, 8 and 12% and sodium hypochlorite with 0 (control), 5, 10 and 15 mgL-1 concentrations were applied to the cut rose cv. Cardinal. By analyzing of data collected, illustrated that cut rose cv. Cardinal significantly responded to sucrose and NaOCl levels. Combination of 15 mgl-l NaOCl with 12% sucrose was found more favorable for the whole studied parameters. Early flower opening (4 days), maximum flower fresh weight (12.30g), flower size (6.01 cm), maximum flower longevity (16 days) and and dry weight (3.78) were observed for cut rose retained in solution mixture of 12% sucrose and 15 mgL-1 NaOCl. The solution containing 12% Sucrose and 15 mgL-1 NaOCl significantly increased (12.30 g) flower fresh weight. Less percent petal drop (10%) was observed by solution containing combination of 12% sucrose and 15 mgL-1 NaOCl as compared to control (33.80 %). As for sugar application individually on cut rose, early flower opening took place (4 days), maximum flower size (6.14 cm), flower fresh weight (11.57g), minimum flower wilting (15.58%), maximum flower dry weight (3.78 g), minimum petal drop (23.96 %) and longer vase life (3.39 days) were observed for 12 % sugar solution. For NaOCl application individualy, the cut rose showed early flower opening took place (4 days), maximum flower size (6.16 cm), maximum flower fresh weight (11.27g), minimum flower wilting (15%), maximum dry weight (4.13 g), minimum petal drop (18.75 %) and longer vase life (14.77) were observed for 15 mg.l-1 of NaOCl solution In general, 15 mg.l-1NaOCl and 12 % sucrose is considered a best solution combination to be used for cut rose flowers cv. cardinal longer and quality vase life. Key words: Cut Rose; Sucrose; NaOCl http://dx.doi.org/10.19045/bspab.2017.60011

Influence of packaging material along with wet refrigerated storage conditions on post-harvest life of cut chrysanthemum cv. Reagan White

An experiment was carried out to investigate the effect of different packaging films comprising of LDPE (100 and 200 gauge), polypropylene, polyethylene, micro-perforated polyethylene and cellophane bags on low temperature storage of cut chrysanthemum flowers cv. Reagan White. The results obtained showed that the LDPE was most effective film in enhancing the vase-life and quality under both refrigerated wet storage and normal ambient conditions. The LDPE 100 gauge packed flower stems resulted in enhanced vase-life compared to other treatments by maintaining flower and leaf membrane stability index coupled with lower physiological loss in weight. The percent decline in total soluble sugars and reducing sugar contents in leaf and ray floret tissues was less in LDPE packaged flowers as compared to other treatments and control. The wrapped flowers stems in refrigerated wet storage after 15 days at 4°C were held in vase at ambient conditions. The maximum vase-life (12.67 days) was found with LDPE 100 gauge packaged flower stems. The higher CO2 and lower O2 concentrations were recorded in LDPE packed flower stems, which were attributed to prevention of oxidative stress. There was marked favourable biochemical changes in the cut flower tissue, viz. total soluble sugars, reducing sugar, leaf chlorophyll content, MDA content, and superoxide dismutase activity in vase under ambient conditions.

Effects of iron nanoparticles and humic acid on growth, development and vase life of cut rose flower cv. White Nablus under hydroponic conditions

Effects of iron nanoparticles and humic acid on growth, development and vase life of cut rose flower cv. White Nablus under hydroponic conditions

Evaluation of the effect of plant growth substances on longevity of gerbera cut flowers cv. Sorbet.

Gerbera is one of the most popular cut flowers in the world. Several experiments have been done on the effect of different chemical compounds on longevity and quality of cut flowers. In the present study, two experiments based on a completely random design with two treatments and three replications were conducted on gerbera cut flower cv. Sorbet. The first experiment examined the effect of BA, GA3, and SA at 2 concentrations (50 and 100 ppm) as a pulse treatment and then holding vase life solution containing 3 ppm silver nanoparticle with 3% sucrose. The second experiment investigated the effect spray application of BA, GA3, and SA at 2 concentrations (25 and 50 ppm) and then holding vase life solution containing 3 ppm silver nanoparticle with 3% sucrose. Distillated water and 3 ppm silver nanoparticle with 3% sucrose were used as control. During the experiments traits such as vase life, relative fresh weight, anthocyanin content, PAL activity, and SOD activity were measured. Results showed that there was significant difference between treatments and control. As for different concentrations of BA, GA3, and SA followed by NSP and sucrose treatment in the first excrement, SA 100 ppm with 8.9 day longevity compared with control (5.6 day) and in second experiment, SA 50 ppm with 9.8 day longevity compared with control (5.9 day) had better result than other treatments in quantity and quality of enzymatic traits and vase life, respectively. Results revealed that there was significant difference between treatment and control (p≤0.01) in postharvest life in gerbera cut flowers.