عمر گلجای

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1 - مروری بر عوامل موثر در عمر گلجای رز شاخه بریده (Rosa hybrida L.)
محمد فضلی

یکی از معیار های مهم در تعیین کیفیت گل شاخه بریده عمر گلجای آن است. عمر گلجای یک گل شاخه بریده به مدت زمان بین قرارگیری ساقه در محلول گلجای تا از دست دهی ارزش زینتی قابل رویت اشاره دارد. از علائم پایان عمر گلجای رز شاخه بریده می‌توان به خمیدگی گردن، آبی شدن و پژمردگی اش أکثر

یکی از معیار های مهم در تعیین کیفیت گل شاخه بریده عمر گلجای آن است. عمر گلجای یک گل شاخه بریده به مدت زمان بین قرارگیری ساقه در محلول گلجای تا از دست دهی ارزش زینتی قابل رویت اشاره دارد. از علائم پایان عمر گلجای رز شاخه بریده می‌توان به خمیدگی گردن، آبی شدن و پژمردگی اشاره نمود. عوامل بسیاری در عمر گلجای رز شاخه بریده موثر هستند که در دسته بندی کلی می توان آن ها را به دو دسته عوامل قبل از برداشت و عوامل پس از برداشت تقسیم بندی کرد. مهم ترین عوامل قبل از برداشت شامل رطوبت نسبی، آلودگی بوتریتیس، شرایط نوری، تغذیه و دما می‌باشد. مشاهده شده است که رز های پرورش یافته در رطوبت نسبی بالا، دوره نوری نور مداوم، شدت نور و CO2 کم و همچنین گل های پرورش یافته در فصل زمستان عمر گلجای کوتاه تری خواهند داشت. عموما تاثیر عوامل قبل از برداشت در عمر گلجای رز شاخه بریده بر روی تعادل آبی گیاه و عملکرد استوماتی آن است. زمان برداشت، طول ساقه ی گل، شرایط محیطی نگهداری گل و تاثیر برخی تنظیم کننده های رشد گیاهی از عوامل مهم پس از برداشت در گل شاخه بریده رز می باشند. در این مقاله مروری به بررسی این عوامل پرداخته خواهد شد. تفاصيل المقالة

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2 - بررسی ویژگی‌های مورفوفیزیولوژیک و عمر گلجایی آلسترومریا (Alstromeria spp.) با کاربرد اسید سالیسیلیک در پس از برداشت
مهناز قنبری الهام دانائی

این تحقیق به منظور افزایش کیفیت و طول عمر پس از برداشت گل‌های شاخه بریده آلسترومریا طراحی و انجام شد. در این بررسی از تیمار کوتاه مدت اسید سالیسیلیک در سه سطح 50، 100 و 150 میلی‌گرم در لیتر و سپس محلول نگهدارنده نانو ذرات نقره 2 میلی‌گرم در لیتر به همراه ساکارز 3 درصد ا أکثر

این تحقیق به منظور افزایش کیفیت و طول عمر پس از برداشت گل‌های شاخه بریده آلسترومریا طراحی و انجام شد. در این بررسی از تیمار کوتاه مدت اسید سالیسیلیک در سه سطح 50، 100 و 150 میلی‌گرم در لیتر و سپس محلول نگهدارنده نانو ذرات نقره 2 میلی‌گرم در لیتر به همراه ساکارز 3 درصد استفاده شد. آب مقطر و نانو ذرات نقره به همراه ساکارز به عنوان شاهد، بود. این آزمایش بصورت فاکتوریل در قالب طرح آماری کاملاً تصادفی با 5 تیمار و 3 تکرار (هر تیمار شامل 5 شاخه گل بریده آلسترومریا) انجام شد. نمونه‌برداری و اندازه‌گیری صفات مورد نظر در روزهای شروع آزمایش، 5، 10 و 15 صورت گرفت. نتایج نشان داد که بیشترین وزن تر نسبی، میزان جذب محلول، درصد شاخص ثبات غشاء سلول و عمر گلجایی گل‌های شاخه بریده آلسترومریا در تیمار اسید سالیسیلیک 150+ نانو ذرات نقره+ ساکارز بود. بیشترین میزان مواد جامد محلول، محتوای آنتوسیانین و کلروفیل کل در تیمار اسید سالیسیلیک 100+ نانو ذرات نقره+ ساکارز بدست آمد. لذا می‌توان غلظت‌های 100 و 150 میلی‌گرم در لیتر اسید سالیسیلیک به همراه نانو ذرات 2 میلی‌گرم در لیتر و ساکارز 3 درصد را برای بهبود ویژگی‌های مورفوفیزیولوژیک و عمر گلجایی آلسترومریا توصیه نمود. تفاصيل المقالة

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3 - مقایسه برخی صفات مورفولوژیکی، فیزیولوژیکی و دوام عمر گل‌های شاخه بریده رز رقم grand prix با کاربرد پوتریسین، اسپرمین و اسپرمیدین
زهره رزم آور

طول عمر گل‌های بریده نقش مهمی در ارزش اقتصادی صنعت گلکاری بازی می‌کند. در این تحقیق اثرات پوتریسین، اسپرمین و اسپرمیدین روی گل‌های شاخه بریده رز مورد بررسی قرارگرفت. پوتریسین، اسپرمین و اسپرمیدین هر یک در دو سطح(100 و 200 میلی‌گرم در لیتر) در ترکیب با نانو ذرات نقره 3 م أکثر

طول عمر گل‌های بریده نقش مهمی در ارزش اقتصادی صنعت گلکاری بازی می‌کند. در این تحقیق اثرات پوتریسین، اسپرمین و اسپرمیدین روی گل‌های شاخه بریده رز مورد بررسی قرارگرفت. پوتریسین، اسپرمین و اسپرمیدین هر یک در دو سطح(100 و 200 میلی‌گرم در لیتر) در ترکیب با نانو ذرات نقره 3 میلی‌گرم در لیتر و ساکارز 3 درصد مورد استفاده قرارگرفتند. طرح آماری این آزمایش کاملاً تصادفی بود. صفاتی مانند فعالیت آنزیم سوپر اکسید دیسموتاز، حجم محلول جذب شده، کلروفیل کل برگ و عمر گلجایی مورد بررسی قرار گرفتند. نتایج آزمایش نشان داد که تیمار اسپرمین در سطح 200 میلی گرم موجب افزایش فعالیت آنزیم سوپراکسید دیسموتاز، حجم محلول جذب شده، کلروفیل کل برگ و عمر گلجایی می‌شود. تفاصيل المقالة

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4 - Effects of Silver Nanoparticles (SNPs) Pulsing Treatment and Sucrose Holding on Flower and Leaf Senescence of Cut Rose
Khadijeh Alkasir Rahim Naghshiband Hassani Alireza Motalebi Azar

This experiment was carried out to evaluate the effect of silver nanoparticles pulsing treatment (0, 25, 75 and 125 mg L−1) on vase life and some postharvest physiological parameters of cut rose flower ʻHigh & Magicʼ in sucrose solution (0, 2 and 3%). This res أکثر

This experiment was carried out to evaluate the effect of silver nanoparticles pulsing treatment (0, 25, 75 and 125 mg L−1) on vase life and some postharvest physiological parameters of cut rose flower ʻHigh & Magicʼ in sucrose solution (0, 2 and 3%). This research performed as a factorial experiment based on a completely randomized design with three replications under 23 ± 2 °C, 60 ± 5% RH and 12 µmol m−2 s−1 light intensity (cool white florescent tubes) under a daily light period of 12 h. Results showed that 125 mg L−1 silver nanoparticles without sucrose or with 2% sucrose had the lowest stem end bacteria. Pulse treatments with silver nanoparticles at all concentrations improved solution uptake, maintenance of the relative fresh weight, flower diameter and chlorophyll fluorescence ratio (Fv/Fm) as compared to control. The highest amount of flower opening with the largest flower diameter was observed in 75 mg L−1 pulsed silver nanoparticles with 2% sucrose solution on day 9 of vase period. Control flowers (deionized water) without or with 2% sucrose exhibited the shortest vase life. The concentrations of 75 and 125 mg L−1 with 2% sucrose or without it had the longest vase life as compared to other treatments. تفاصيل المقالة

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5 - Effect of Pre-harvest Foliar Application of Polyamines and Calcium Sulfate on Vegetative Characteristics and Mineral Nutrient Uptake in Rosa hybrida
Mehdi Hosseini Farahi Abdolhossein Aboutalebi Jahromi

In order to improve the quality of cut rose ‘Dolce Vita’, an investigation was performed with 20 treatments, 3 replications, and 2 plants in each replicate in a greenhouse with the open soilless culture system. The treatments included control (distilled wate أکثر

In order to improve the quality of cut rose ‘Dolce Vita’, an investigation was performed with 20 treatments, 3 replications, and 2 plants in each replicate in a greenhouse with the open soilless culture system. The treatments included control (distilled water), putrescine (Put) at the rates of 1, 2 or 3 mM, spermidine (Spd) at the rates of 0.5, 1 or 1.5 mM, spermine (Spm) at the rates of 1, 2 or 4 mM, calcium sulfate (CS) at the rates of 2.5 or 5 mM, and the combined treatments of Put + CS and Spd + CS. The traits such as stem height, flower length and diameter, stem fresh weight, vase life, and leaf mineral uptake including N, P, K, Ca, Fe and Zn were measured. According to the results, the combined application of polyamines (PAs) with CS had a significant influence on increasing the parameters such as stem height, flower length and diameter, stem fresh weight, and vase life. The rose flowers treated with Put 2 mM + CS 2.5 mM, Spd 0.5 or 1 mM + CS 5 mM showed the highest vase life (16.2, 16 and 16 days, respectively) compared to other treatments. The combined application of PAs and CS enhanced the uptake of minerals when compared to their individual application. The plants sprayed with Spd and CS exhibited the highest Ca uptake. Generally, the results showed that PAs and CS increased quantitative and qualitative characteristics of rose flower ‘Dolce Vita’ in soilless culture system due to the increased uptake of minerals. It can be inferred that the foliar application of PAs and CS sulfate can be effective in improving the quantitative and qualitative traits of this cultivar. تفاصيل المقالة

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6 - Screening Eight Cultivars of Alstroemeria Cut Flower for Vase Life and Biochemical Traits
Sahar Naghiloo Ali Soleimani Vali Rabiei Ahmad Khalighi Mohammadtaher Harakinejad

Alstroemeria is one of the most popular cut flowers in European Union owing to its postharvest longevity and broad color spectra. Nevertheless, premature wilting decreases the esthetic value of flowering branches even before the opening of the secondary florets in the f أکثر

Alstroemeria is one of the most popular cut flowers in European Union owing to its postharvest longevity and broad color spectra. Nevertheless, premature wilting decreases the esthetic value of flowering branches even before the opening of the secondary florets in the fluorescence. The present study evaluated different biochemical and morphological traits of Alstroemeria cut flowers in order to screen the longevity of eight cultivars of Alstroemeria cut flowers including (Topaz, Chicago, Mayfair, Onyx, Frosty, Bellevue, Samantha, and Dimension). Traits such as longevity, wilting, water uptake, chlorophyll content, total soluble solids, relative water content, catalase activity, peroxidase activity, and protein content were evaluated. Data were subjected to the statistical and cluster analysis. The results showed that Mayfair and Frosty cultivars have the greatest distance from another. Mayfair had the lowest longevity. Frosty exhibited the most significant difference and was the most different cultivar from other cultivars in terms of biochemical traits, so that it was clustered in a separate group. As a result, two cultivars with the longest and the shortest longevity was determined. Maximum peroxidase activity was related to Frosty, differing significantly from that of Mayfair. تفاصيل المقالة

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7 - The Effect of Dill and Cumin Essential Oils on Physiological and Microbiological Traits of Cut Alstroemeria ( Alstroemeria hybrida)
Motahareh Ershad Langroudi Davood Hashemabadi Sepideh Kalateh Jari Leila Asadpour

Alstroemeria (Alstroemeria hybrida) is one of the most important cut flowers in the world. The aim of this study is investigating on the effect of dill and cumin essential oils on physiological and microbiological traits of alstroemeria cut flowers. Hydro-distillation m أکثر

Alstroemeria (Alstroemeria hybrida) is one of the most important cut flowers in the world. The aim of this study is investigating on the effect of dill and cumin essential oils on physiological and microbiological traits of alstroemeria cut flowers. Hydro-distillation method and GC isolated the essential oils of seed and GC/MS examined the chemical compositions of the samples. This experiment carried out as factorial based on completely randomized design with two factors of essential oils of dill and cumin (50 and 100 ppm). The second factor was used of methods (pre-harvest, post-harvest). The results showed that the dill essential oil treatment (100 ppm) in pre-harvest was the best treatment for all known traits. 11 colonies of bacteria were identified in stem end of cut alstroemeria flowers; which are E-coli, Enterobacter, Klebsiella, Proteus, Serratia, Citrobacter, Pseudomonas, Staphylococcus aureus, Streptococcus, Bacillus cereus and Actinomycetes. Due to the positive impact of dill essential oil (100 ppm) in the pre-harvest method in improving traits associated with vase life of cut alstroemeria flowers, these treatments are recommended. تفاصيل المقالة

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8 - Biochemical and Physiological Responses of Tuberose (Polianthes tuberosa L.) Cut Flower to Silver Nanoparticles Treatment
Keramatallah Mohammadi Saeid Chavoshi Hossein Ali Asadi-Gharneh Masoud Gomarian Behzad Edrisi

Tuberose is an valuable ornamental plant with a high economic value, which is among the five leading cut flowers of the world. The major obstacle hindering the development of cut flower exports, especially tuberoses, is their short postharvest vase life caused by the di أکثر

Tuberose is an valuable ornamental plant with a high economic value, which is among the five leading cut flowers of the world. The major obstacle hindering the development of cut flower exports, especially tuberoses, is their short postharvest vase life caused by the disruption of the plant’s water relations due to growth and an increase in vase solution microbial load. The quality and longevity of flowers are highly dependent on their stem stability and antioxidant systems. This research investigated the effect of Nano-silver (NS) applied to the cut flowers of tuberoses cv. ‘Dezfuli’ in 24 h pulse treatments in a randomized complete design. The cut flowers were treated with NS at four rates (0 as control, 10, 20, and 30 mg/L) along with 3% sucrose. Then, the treated flowers were fully immersed in deionized water. The results showed that the application of NS treatment positively increased the activity of antioxidant enzymes and improved postharvest conditions in Polianthes tuberosa L. (cut tuberose flower). Moreover, NS reduced the accumulation of malondialdehyde (MDA) in flower stems and also had a positive effect on the rate of chlorophyll increase compared to the control. NS extended the postharvest vase life of the treated flowers versus the control and increased solution uptake and fresh weight of the cut flowers. In this experiment, the 10 mg/L rate of NS exhibited the best results. تفاصيل المقالة

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9 - Effect of Internal Anthocyanin of Petals and External Sucrose on Some Post-Harvest Traits of Four Carnation Cut Flower Cultivars
Laya Asadi Mousa Solgi Babak ValizadehKaji

The amount of internal anthocyanin in carnation cut flowers may be one of the factors affecting the vase life of colored carnations. Two experiments were conducted to examine the effect of changing the internal anthocyanin concentration in petals and the using of extern أکثر

The amount of internal anthocyanin in carnation cut flowers may be one of the factors affecting the vase life of colored carnations. Two experiments were conducted to examine the effect of changing the internal anthocyanin concentration in petals and the using of external sucrose on vase life of four cultivars of carnation cut flowers in this study. Four carnation cultivars were used including: white (White Liberty), yellow (Yellow Liberty), pink (Tabor), and red (Grand Slam). In the first experiment, the changes in internal anthocyanin of petals and its effect on vase life of the four cultivars were investigated. Different concentrations of external sucrose (0, 2 and 4%) on post-harvest traits of four mentioned cultivars were evaluated in the second experiment. The results of the first experiment showed that the possibility effectiveness of internal anthocyanin on vase life of carnation. Vase life of the cultivars without internal anthocyanin (white and yellow) was twice (14 days) as long as that of the red and pink cultivars containing anthocyanin (7 days). Results of the second experiment indicated that external sucrose improved the vase life traits. Moreover, the lowest vase life was observed in red cultivar (13.7 days) without the using of external sucrose and the highest vase life was found in the pink cultivar (18 days) treated with 4% external sucrose. In general, increasing in internal anthocyanin in the absence of external sucrose reduced vase life. Using of external sucrose increased the vase life of cultivars containing more anthocyanin. تفاصيل المقالة

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10 - Investigation of the Impact of Benzyladenine and Several Natural Compounds on the Vase Life and Some Qualitative Traits of Tuberose Cut Flowers
Zahra Golsahdi Ghaleh Shahi Mehrdad Babarabie Sadegh Atashi Hossein Zarei Atoosa Danyaei

Tuberose (Polianthes tuberosa) is one of the most important cut flowers with fragrant buds. To prolong vase life of tuberose, proper preservative solution applying is necessary. For this purpose, two types of chemical and natural treatments were used. Applied treatments أکثر

Tuberose (Polianthes tuberosa) is one of the most important cut flowers with fragrant buds. To prolong vase life of tuberose, proper preservative solution applying is necessary. For this purpose, two types of chemical and natural treatments were used. Applied treatments were benzyladenine (50, 100, and 150 mg l-1), the extracts of rosemary and Eucalyptus (12, 25 and 50%) and sour orange fruit extract (3, 4, 5 and 6 ml l-1). Sucrose 4% was used in all solutions. Measured characteristics included the vase life, the percentage of opening of the buds, the relative fresh weight, the solution absorption, the total soluble solids, chlorophyll a, b and total chlorophyll. The results showed that the maximum vase life was obtained in benzyladenine treatment of 50 mg l-1 (11.66 days) and the minimum vase life was obtained in the control treatment and rosemary extract of 50% (6.33 days). The highest percentage of buds opening was related to the benzyladenine treatment of 150 mg l-1. The maximum relative fresh weight and solution absorption were obtained in the benzyladenine treatments of 100 and 50 mg l-1, respectively and the maximum amount of total soluble solids was obtained in Eucalyptus extract treatment of 12 %. In addition, the maximum amount of chlorophyll a, b and total was related to the treatment of sour orange fruit extract of 4.5 mg l-1. In general, the results showed that benzyladenine had the maximum vase life but, natural compounds especially the extracts of Eucalyptus and sour orange had the significant effect on the vase life and the other traits of tuberose cut flowers and they can be used as simple, healthy and cheap compounds. تفاصيل المقالة

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11 - Improvement Postharvest Quality of Cut Alstroemeria (Alstroemeria hybrida) by Stem-End Splitting and Ethanol
Nastaran Sadeghi Hafshejani Davood Hashemabadi

For the improvement the postharvest longevity of cut alstroemeria (Alstroemeria hybrida L.), a factorial experiment was carried out based on RCD with 2 factors of stem end splitting at two levels (5 cm splitting and without splitting) and ethanol at five levels (0, 1, 2 أکثر

For the improvement the postharvest longevity of cut alstroemeria (Alstroemeria hybrida L.), a factorial experiment was carried out based on RCD with 2 factors of stem end splitting at two levels (5 cm splitting and without splitting) and ethanol at five levels (0, 1, 2, 4 and 6%), 10 treatments, 3 replications and 30 plots. In this experiment, the estimated traits included vase life, water absorbtion, fresh weight, dry matter percent, ethylene, petal anthocyanin, electrolyte leakage and lipid peroxidation (MDA). ANOVA showed significant differences among treatments for vase life, water absorbtion, dry matter percent and electrolyte leakage at the 5% probability level and for other traits at the 1% probability level. Results showed that different treatments improved vase life as compared to control and maximum vase life of 19.77 days was achieved under the treatment of ethanol 1% + with 5 cm splitting compared to control (11.09 days). تفاصيل المقالة

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12 - Effect of Gibberellic Acid Pulsing and Sucrose Continuous Treatment on Some Qualitative Characteristics of Cut Rose Flower cv. Velvet
Zahra Ahmadi Rahim Naghshiband Hassani

The aim of this study was the better assessment of the relationship ofpulsing treatment of gibberellic acid as an anti-senescence agent and holdingin sucrose as a carbohydrate supply resource on improving some qualitativeand physiological attributes of cut rose flower c أکثر

The aim of this study was the better assessment of the relationship ofpulsing treatment of gibberellic acid as an anti-senescence agent and holdingin sucrose as a carbohydrate supply resource on improving some qualitativeand physiological attributes of cut rose flower cv. Velvet. Hence, anexperiment involving the pulsing treatment with gibberllic acid (GA3) at 0,20, 40 and 60 mg L-1, for 24 hours, and holding them in sucrose at 0, 2 and3% with 250 mg L-1 of 8- HQS as an antimicrobial agent for all holdingtreatments was conducted. The study was performed as a factorial experimentbased on a randomized completely design (RCD) with three replication foreach combination treatment. Applying GA3 pulse treatment alone at all concentrationsincreased significantly vase life and its effect enhanced withsucrose holding at 2 and 3% compared with control. The effect of GA3pulsing in increasing of stem relative fresh weight (RFW) and solutionuptake (SU) was hastened by sucrose holding treatment at 2 and 3%.Highest amount of flower opening and petal water content during vase lifeperiod was observed in 60 mg L-1 of GA3 pulsing and sucrose 3% holdingtreatment which had been longer flower diameters and greater petals.Gibberellic acid pulsing alone and along with sucrose holding treatment atall concentrations caused to prevention of leaf chlorophyll degradationcompared with control. In conclusion, GA3 pulsing at 40 mg L-1 along withsucrose 2% holding treatment had a significant effect on improving vase lifeand other qualitative attributes of cut rose flower cv. Velvet. تفاصيل المقالة

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13 - Increasing the Vase Life of Alstroemeria Cut Flowers Using Cycloheximide, Benzyladenine and Coconut Juice
Saeedeh Alizade Matak Davood Hashemabadi

In order to improve the vase life of alstroemeria cut flowers (Alstroemeria aurantiaca), an experiment was performed based on completely randomized design with 10 treatments including cycloheximide (50, 100 and 200 mg l-1), benzyladenine (50, 100 and 200 mg l-1), coconu أکثر

In order to improve the vase life of alstroemeria cut flowers (Alstroemeria aurantiaca), an experiment was performed based on completely randomized design with 10 treatments including cycloheximide (50, 100 and 200 mg l-1), benzyladenine (50, 100 and 200 mg l-1), coconut juice (5, 10 and 20 %) and control (distilled water) in three replications. In this study, characteristics such as vase life, dry matter, increasing ° Brix, the percentage of flower opening, chlorophyll a and b and ionic leakage were evaluated. The results showed that coconut juice at a concentration of 5% has the maximum vase life (17.39 days), although it has no significant difference with different levels of benzyladenine and 10 and 20% coconut juice treatments. 10% coconut juice with 2.58 and 0.88 has the highest ° Brix and flower opening index, respectively. Treatments of 50 mg l-1 benzyladenine, 5 and 10% coconut juice had the maximum impact on the amount of dry matter. The most successful treatments for reducing ionic leakage are two treatments of 5% coconut juice and 100 mg l-1 benzyladenine. All treatments cause maintenance of chlorophyll a and b compared to the control, and two treatments of 50 mg l-1 cycloheximide and 5% coconut juice had the highest content of chlorophyll a and b, respectively among treatments. According to the obtained results, using 5% coconut juice in the vase solution can effectively improve the vase life of alstroemeria cut flowers. تفاصيل المقالة

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14 - The Role of 1-methylcyclopropene (1-MCP) in Improving the Postharvest Quality of Some Cut Rose Cultivars
Fahmy A.S. Hassan

In order to improve the postharvest quality and the export ability of cut rose (Rosa hybrida L.) cvs. Happy Hour and Bordeaux, the effect of 1-methylcyclopropene (1-MCP) as an ethylene inhibitor, was investigated. 1-MCP was used at 0.3, 0.4, 0.5 and 0.6 g m-3 for 18 h a أکثر

In order to improve the postharvest quality and the export ability of cut rose (Rosa hybrida L.) cvs. Happy Hour and Bordeaux, the effect of 1-methylcyclopropene (1-MCP) as an ethylene inhibitor, was investigated. 1-MCP was used at 0.3, 0.4, 0.5 and 0.6 g m-3 for 18 h at 8 °C to simulate the transport of flowers. 1-MCP treatment significantly prolonged the vase life and minimized the weight loss of both cultivars compared to the control, however the response of Happy Hour cultivar was higher than the Bordeaux cultivar. 1-MCP treatment enhanced the relative water content (RWC) of flowers. The treatment of 1-MCP significantly retarded the degradation of chlorophyll and carbohydrate contents during vase life evaluation in both cultivars. The ethylene production was significantly decreased by applying 1-MCP treatment. The membrane stability index (MSI) was maintained while malondialdehyde (MDA) was decreased in response to 1-MCP treatment. The best treatments in this concern were 1-MCP at 0.4 and 0.5 g m-3 for Happy Hour and Bordeaux cultivars, respectively. 1-MCP treatment was recommended to inhibit the negative effects of ethylene on rose cultivars tested. تفاصيل المقالة

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15 - تأثیر سولفات آلومینیوم، هیدروکسی کوینولین سیترات و هیپوکلریت کلسیم بر شاخص های فیزیولوژیکی و میکروبیولوژیکی پس از برداشت گل بریدنی رز رقم ستاره قطبی
محمد مهدی جوکار

از آنجایی که یکی از عوامل مهم کاهش عمر و افزایش تلفات گل های بریدنی بر هم خوردن روابط آبی گل در اثر رشد و افزایش جمعیت باکتریایی محلول نگهدارندة گل بریدنی می باشد، این پژوهش در دو بخش فیزیولوژی پس از برداشت گل بریدنی و میکروبیولوژی محلول گلجای به منظور یافتن ترکیب مناسب أکثر

از آنجایی که یکی از عوامل مهم کاهش عمر و افزایش تلفات گل های بریدنی بر هم خوردن روابط آبی گل در اثر رشد و افزایش جمعیت باکتریایی محلول نگهدارندة گل بریدنی می باشد، این پژوهش در دو بخش فیزیولوژی پس از برداشت گل بریدنی و میکروبیولوژی محلول گلجای به منظور یافتن ترکیب مناسب و ارزان برای کنترل جمعیت میکروبی محلول نگهدارندة گلجای گل های بریدنی رز رقم ستاره قطبی در قالب طرح آماری کاملاً تصادفی با 10 تیمار در 9 تکرار صورت گرفت. تیمارهای مورد استفاده در این پژوهش شامل: سولفات آلومینیوم (200، 400 و 600 میلی‌گرم در لیتر)، هیدروکسی کوینولین سیترات (200، 300 و 400 میلی‌ گرم در لیتر)، هیپوکلریت کلسیم (400، 600 و 800 میلی‌گرم در لیتر) و آب مقطر استریل شده به عنوان شاهد بود. در بخش اول، شاخص های فیزیولوژیکی پس از برداشت همچون عمر گلجایی، اثرات جانبی، تغییرات وزن تر و میزان جذب محلول گلجای مورد بررسی قرار گرفت. در بخش دوم، شاخص های میکروبیولوژی محلول گلجای همچون شمار میکروبی، رشد میکروبی و نوع میکروارگانیزم های محلول گلجای مورد مطالعه قرار گرفت. نتایج بخش فیزیولوژی پس از برداشت نشانگر تأثیر مطلوب سولفات آلومینیوم بر عمر گلجایی و کیفیت پس از برداشت گل بریدنی رز ستاره قطبی بود. به نحوی که بیشترین عمر گلجایی با 67/11 روز در گل های تیمار ده با 200 میلی گرم در لیتر سولفات آلومینیوم مشاهده گردید. بیشترین افزایش و کمترین کاهش در وزن تر شاخه های گل و همچنین بیشترین میزان جذب محلول گلجای نیز در گروه تیماری سولفات آلومینیوم مشاهده گردید. این در حالی بود که هیدروکسی کوینولین سیترات مؤثرترین ترکیب در کنترل جمعیت میکروبی محلول گلجای بود. بیشتر میکروارگانیزم های یافت شده در محلول گلجای این آزمایش گونه هایی از Bacillus، Coccus و Streptomyces بودند. مناسب ترین ترکیب برای محلول گلجای گل بریدنی رز رقم ستاره قطبی با توجه به طول عمر گلجایی بیشینه، تأثیر مطلوب بر خصوصیات فیزیولوژیکی پس از برداشت و کنترل مناسب رشد میکروبی غلظت 200 میلی گرم در لیتر سولفات آلومینیوم بود. تفاصيل المقالة

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