M. Ghazaeian; Gh.H. Davarynejad; K. Ghasemi Bezdi; S.H. Nemati
Abstract
Introduction: The walnut family (Juglandaceae) consists of approximately 60 species of deciduous trees is native of the American continents, Europe, and Asia. Pecan (Carya illinoensis) is belonged to the Juglandaceae family and is one of the most valuable nut products all over the world. Embryo culture ...
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Introduction: The walnut family (Juglandaceae) consists of approximately 60 species of deciduous trees is native of the American continents, Europe, and Asia. Pecan (Carya illinoensis) is belonged to the Juglandaceae family and is one of the most valuable nut products all over the world. Embryo culture techniques for plant breeding as well as basic studies in physiology and biochemistry are widely used. The low percentage of germination and the long propagation cycle and the need for stratification treatments from three to six months are the most important barriers to the development of high yielding cultivars through hybridization. Plant regeneration methods from embryo culture in vitro allows overcoming the barriers of hybridization, as well as obtaining higher and faster multiplication rate of plants of an elite genotype.
Materials and Methods: In this experiment, an adapted native genotype of pecan in Gorgan city, Golestan province, Iran was selected. The mature fruits were harvested after five months of pollination. They were immediately transferred to the laboratory. For cold pretreatment, nuts packed in a paper bag and stored in 4-5ºC for 15 days. The effect of two types of culture medium, growth regulators and seed pretreatment (15 days at 4-5 °C) on germination of mature embryos of pecan has been determined. Murashige and Skoog (MS) and Woody Plant Medium (WPM) and IBA (0 and 1 mgl-1), BAP (0, 1 and 2 mgl-1) and GA3 (0 and 1 mgl-1) media were used to embryo rescue evaluation. The data obtained were statistically analyzed in completely randomized block design (RCBD). Each treatment was replicated at least third, and each replicate consisted of two zygotic embryos. Means of germination period, percent of seed germination, root and shoot length and leaf number in different media and various PGRs combination were compared based on LSD at p ≤0.05.
Results and Discussion: The results showed, although cold pretreatment for 15 days had no effect on germination period, root length and number of leave but also, effect on germination percentage and shoot length. There are some different hypothesis about the effect of cold pretreatment on embryo germination between researchers. Some researchers believed that, there is low efficiency in embryo germination in lack of cold pretreatment and GA3. Cold pretreatment or GA3 reduce the ABA level and promote embryos germination. The others reported poor germination for somatic embryos when they treated with GA3 and cold pretreatments. Pearce et al. (1987) reported that GA3 and substrate of GA3 can be increased during the chilling process as ABA levels decrease. Furthermore, application of exogenous GA3 induces germination. Tang et al. (2000) reported that somatic embryos germination poorly happened in cold condition and addition of GA3 did not change the poor germination. Kaur et al. (2006) and Peyghamzadeh and Kazemitabar (2010), reported that the embryo germination in Juglans regia L. was higher when GA3 and cold pretreatments were simultaneously applied as compared to those when applied separately. In this experiment, media has no effect on embryo germination period but, could effect on other parameters. As the results showed, MS media showed the maximum percentage of germination, root and shoot length and number of leave in both condition (with and without cold pretreatment). In this experiment root length of germinated pecan embryo was higher in MS medium. Mapelli et al. (2001) reported that seed germination resulted in marked changes in the metabolism of free amino acids in walnut cotyledons. About 52% of the total free amino acids in one-month-old seedlings was present in the cotyledons and about 26% was in the taproot. The concentration of free amino acids in the taproot was similar to that in the embryonic axis, and greater than that in the cotyledons. T11 (1mg/l-1 IBA, 1mg/l-1BAP and 1mg/l-1 GA3) and T12 (1mg/l-1 IBA, 2mg/l-1BAP and 1mg/l-1 GA3) treatments were the highest in germination percentages in both treatment (with and without cold pretreatment). There was no significant differences between 1 mgl-1 and 2 mgl-1 of BAP.
Conclusion: Pecan as like walnut, is considered to be one of the most recalcitrant species in vitro. It is necessary to determine the optimal culture conditions to establish it for shortening time in seed propagation. This seedling could be applied as primary material for breeding programs, grafting and physiology study. The best growth of micro plant achieved in MS medium with 1 mgl-1IBA, 1 mgl-1GA3 and 2 mgl-1BAP.
Kh. Hemmati; B. Ardavanpour; M. Ghazaeian; V. Akbarpour
Abstract
Introduction: Essential oils make up a large part of aromatic substances in plants. Generally, essential oils are considered as remnants of main processes of plants metabolism, especially in stressful conditions. Summer savory (Satureja hortensis L.) is one of the most important plants in Lamiaceae family, ...
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Introduction: Essential oils make up a large part of aromatic substances in plants. Generally, essential oils are considered as remnants of main processes of plants metabolism, especially in stressful conditions. Summer savory (Satureja hortensis L.) is one of the most important plants in Lamiaceae family, which it’s more than 30 species grown in the East Mediterranean. It is one of the oldest plants that have been used as vegetables and medicinal and aromatic plants. Dried summer savory has been introduced as one of the most pleasant spices that are planting in large areas of farmland in many countries. Generally, the aerial parts of it, that is usually harvested at flowering stage, has therapeutic effects such as facilitating digestion, stomach tonic, diuretic, astringent, carminative, anti-diarrhea and anti-worm. Summer savory essential oil is used in food (conserves and beverages) and pharmaceutical industries. Various studies on S. hortensis essential oil has been showed that it contains high amounts of phenolic compounds such as Carvacrol, γ-Terpinene, Thymol, p-Cymene, β-Caryophyllene, Linalool and other terpenoids.
Organic fertilizers have been known to improve the biodiversity and may prove a large depository for excess carbon dioxide. These fertilizers increase the number of soil organisms by providing organic matter and micronutrients for organisms such as fungal mycorrhizae, (which aid plants in absorbing nutrients), and can drastically reduce external inputs of pesticides, energy and fertilizer, at the cost of decreased yield. Nevertheless they are as effective as chemical fertilizers over longer periods of use.
The aim of this project was to study the effects of different organic matters on vegetative and reproductive growth and percentage and components of essential oil in three Satureja ecotypes in Gorgan, Golestan, Iran climate.
Materials and Methods: This study was designed as a factorial experiment based on Randomized Complete Block design with four replications and done in research farm of Agriculture and Natural Resource, University of Gorgan in 2010. Treatments were cattle manure, municipal solid waste, leaves compost, the mixture of them and control. Three ecotypes of summer savory studied in this experiment were Kordestan, Shiraz and Yazd.
The plants were harvested at full flowering stage, when they have the highest essential oil and were dried in oven at 45 °C. The essential oils of dried samples were isolated by hydro distillation for 3 h, using a Clevenger-type apparatus.
Statistical analysis was performed by SAS software and the mean comparison were measures by using Duncan tests at 5% level of probability.
Results and Discussion: The analysis of variance showed that media had significant effect on yield components in summer savory. There were no significant differences between ecotypes and media*ecotype effect on some parameters of yield components. The cattle manure showed positive effects on bush height in this experiment. Hendawy et al (2010) showed that the application of cattle manure and sheep manure had reached significantly the 5% level of plant height and essential oils percentages. They concluded that sheep manure have macro and micro nutrients which provide thyme plants with their requirements from these elements. Essential oil percentage also, tended to increase with application of organic fertilizers either cattle manure, sheep manure or compost. Khalil (2002) showed the effect of two kind of organic fertilizers on Rosmarinus officinalis and Jasminum spp growth parameters and yield components. In this experiment organic manure treatments showed increasing in plant fresh and dry weight. This could be related to positive effect of organic manure on soil texture and fertility. Ahmadian et al. (2006) showed that the animal manure significantly enhanced the number of umbers per plant, the number of seed per plant, the biological and seed yield in Cuminum cyminum. Animal manure significantly enhanced cumin aldehyde and r-cymene and decreased b-pinene, g-terpinene and a-pinene in cumin oil.
Due to the results, treatments had no significant effects on essential oil percentages, but were effective on essential oil components. Hussein et al. (2006) showed that compost levels combined with different distances had a pronounced effect on the various essential oil constituents in Dracocephalum moldavica. In this experiment, Although Shiraz ecotype showed the maximum essential oil percentage (1.2 percent) but there was no significant differences between ecotypes. Among essential oil components, the maximum percentages of Carvacrol achieved in mixture media and Yazd ecotype. Control treatment showed the highest amount of γ- terpinen and paracymene in compare to other media. Shiraz and Kordestan showed also, the highest percentages of γ- terpinen and paracymene, respectively. Plants in mixture media had maximum levels of Carvacrol (74.69 percent). Between ecotypes, Yazd had maximum Carvacrol percentages. Between media, Control treatment was maximum contents of γ –terpinen (5.48) and paracymene (1.76) and other treatments had reduction effects on essential oil components. Between ecotypes, the highest γ-terpinen percentage (5/79) was in Shiraz ecotype and the highest p-cymene percentage (1/69) was in kordistan ecotype.
Conclusion: Therefore, by considering the fertilization of savory plants with different organic manure fertilizers in the form of compost that are economic in each region is recommended.
A. Asefie Najaf Abadi; khodayar hemmati; azim ghasemnejad; mina ghazaeian; Pouneh Ebrahimi
Abstract
Abstract
The harvesting time and storage conditions of olive fruit are effective factors on the quality and quantity of oil. The harvesting time of olive is different in each area and it depends on climatic conditions.This investigation was carried out to assess the impact of harvesting time on olive ...
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Abstract
The harvesting time and storage conditions of olive fruit are effective factors on the quality and quantity of oil. The harvesting time of olive is different in each area and it depends on climatic conditions.This investigation was carried out to assess the impact of harvesting time on olive oil quality and quantity frome two olive varieties cultivated in Gorgan region. For this reason fruits of selected cultivars, Mishen and kroniki, were harvested with fifteen-day intervals from 6 september till middle desember. Then quality and quantity of oil was determined. The results showed that dry matter, oil content (in dry), free fatty acids increased during ripening, whereas peroxide value decreased during ripening. Therefore, the best harvesting time for these cultivars is beginning of December.
Keywords: Olive oil, Harvesting time, Oil quality and Quantity
