M. Mohammadi; N. Majnoun Hosseini; M. Dashtaki
Abstract
This research was aimed to evaluate the impact of nano-ferric oxide and zinc sulfate on leaf pigments and elements of peppermint (Mentha piperita L.) in field conditions. The study was conducted in a factorial experiment based on RCBD with three replicates at the research farm of University of Tehran ...
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This research was aimed to evaluate the impact of nano-ferric oxide and zinc sulfate on leaf pigments and elements of peppermint (Mentha piperita L.) in field conditions. The study was conducted in a factorial experiment based on RCBD with three replicates at the research farm of University of Tehran (Karaj-Iran) in 2013. Nano-ferric oxide at four levels (including 0, 0.25, 0.5, & 0.75 g.L-1) and zinc sulfate at three levels (+0, 25 & 50 kg.ha-1) were used. The pigment traits such as anthocyanin, flavonoid (at 270 nm wavelength), total leaf chlorophyll, and elements (Ca, Mg, Fe, Zn & P) were examined. The results showed that nano-ferric oxideand zinc sulfate had significant effect on leaf flavonoid and total leaf chlorophyll; however, the study fertilizers had no significant effect on leaf anthocyanin. Similarly, the interaction effects of nano-ferric oxideand zinc sulfate were significant on all peppermint traits (P<0.05), except leaf anthocyanin content. The highest and lowest rate of leaf iron content were obtained at 0.25 and 0.75 g.L-1 nano-ferric oxide, respectively, showing that application of nano-ferric oxideincreased the leaf iron and chlorophyll content. Totally, the results indicated that leaf pigment variations of peppermint could be optimized through foliar application of zinc sulfate (25 kg.ha-1) and nano-ferric oxide (0.75 g.L-1) fertilizers.
A. Riazi; N. Majnoun Hosseini; H.A. Naghdi Badi; M.R. Naghavi; Sh. Rezazadeh
Abstract
Hypericin and hyperforin compounds are considered as the main active constituents of Hypericum perforatum L. In this research, phytochemical variations of 25 St. John’s Wort populations in Iran’s natural habitats were investigated. Plants were sampled randomly at the full flowering stage ...
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Hypericin and hyperforin compounds are considered as the main active constituents of Hypericum perforatum L. In this research, phytochemical variations of 25 St. John’s Wort populations in Iran’s natural habitats were investigated. Plants were sampled randomly at the full flowering stage from Golestan, Mazandaran, Gilan, East Azerbaijan, West Azerbaijan, Ardabil, Kurdistan, Hamedan, Kohgiloyeh and Boyr-Ahmad, Qazvin, Zanjan, Khorasan and Tehran provinces during the spring and summer of 2010. Results indicated that the differences in the amounts of hypericin and hyperforin of leaf and flower tissues were found to be significant among populations (P<0.05). Flower tissues had more hypericin and hyperforin amounts as compared to leaf tissues. The amount of hyperforin in both tissues was higher than that of hypericin significantly. Simple correlation analysis showed positive significant correlations between leaf hypericin with dark and light glands density on the leaf and light glands density on the leaf surface area as well as positive significant correlation between leaf hyperforin and leaf hypericin. The principal components analysis indicated that the two components explained 66% of the total variance. The cluster analysis divided these populations into three groups with no consistency in their geographical distribution. In conclusion, the results indicated high variations of phytochemical characters among St. John’s Wort populations in Iran’s natural habitats, which can be utilized in the breeding programs.
M.` Ghorbanpour; N. Majnon Hossieni; Sh. Rezazadeh; M. Omidi; K. Khavazi; M. Hatami; R. Ghafarzadegan
Abstract
In order to indicate the water deficit stress and nitrogen fertilization effects on alkaloids yield and content of Hyoscyamus niger L. plant parts (root and shoot), this experiment was conducted at the full flowering growth stage in greenhouse conditions. Plants were treated with different nitrogen application ...
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In order to indicate the water deficit stress and nitrogen fertilization effects on alkaloids yield and content of Hyoscyamus niger L. plant parts (root and shoot), this experiment was conducted at the full flowering growth stage in greenhouse conditions. Plants were treated with different nitrogen application (0, 75, 150 and 225 kg/ha N as ammonium nitrate in the form of solution, N0-N3) before the commencement of water deficit stress treatment (30, 60 and 90% depletion of water from field capacity, W1-W3). Extracted alkaloids were analyzed by Gas chromatography /mass spectrometery (GC/MS) analysis using a Younglin Acme 6000 GC system equipped with a flame ionization detector (FID) and HP-5MS capillary column (30 m × 0.25 mm, film thickness 0.25 µm). The identification of alkaloids was based on the comparison of their GC retention time and mass spectra data with their standards substances. Results showed that the highest alkaloid content values in root (HYO: 0.281 %DW; SCO: 0.232 % DW) and shoot (HYO: 0.937%DW; SCO: 0.416%DW) were achieved in plants grown under sever water deficit stress (W3) accompanied with nitrogen supply of 225kg/h (N3). The maximum and minimum (20.52 and 8.95mg.plant-1) total alkaloids yield in whole plant were obtained in N2W1 and N3W3 treatments, respectively. The survey results indicated that H. niger in the treatment of moderate water deficit stress (W2) along with 150kg N.h-1 (N2) in addition to having a good amount of content and performance of both alkaloids, it also contained the highest level of SCO, indicating alkaloid quality.
Kh. Karimzadeh; F. Sefidkon; N. Majnoon Hosseini; S.A. Peighambari
Abstract
To study the effect of different levels of soil moisture, zeolite and biofertilizers on physiological characteristics, yield and essential oil of medicinal plant Dracocephalum moldavica L., this research was performed in 2010 at Tehran university research greenhouse. For this purpose, a factorial split-plot ...
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To study the effect of different levels of soil moisture, zeolite and biofertilizers on physiological characteristics, yield and essential oil of medicinal plant Dracocephalum moldavica L., this research was performed in 2010 at Tehran university research greenhouse. For this purpose, a factorial split-plot experiment in RCBD with 4 replications was used. In this study the main plots included different soil moisture levels (90%, 60% and 30 % FC) and subplots consisted of two levels of zeolite (zero, 8gr 4kg-1 soil) along with four levels of biofertilizers (without biofertilizer, nitroxin, biphosphorous, nitroxin+biphosphorous). Results showed that the highest amount of total, a and b chlorophylls, relative water content and yield of essential oil were obtained through %90 FC, but the highest amount of solution carbohydrates, proline and percentage of essential oil were obtained through %30 FC. The maximum amount of studied physiological traits as essential oil percentage and essential oil yield were obtained from application of nitroxin+biophosphorous. Interaction effects of soil moisture, zeolite and biofertilizers showed significant differences among different treatments on amount of a, b and total chlorophyll, relative water content, percentage and yield of essential oil. The maximum amount of oil yields were obtained from zeolite application and combination of nitroxin+biphosphorous and 60% FC and treatment of no consumption of zeolite and combination of nitroxin+biphosphorous with 90% FC. It could be concluded that moderate drought stress (60% FC) with application of zeolite and combination of nitroxin+biphosphorous is beneficial for Dragonhead essential oil yield.
M. Makkizadeh Tafti; R. Tavakol Afshari; N. Majnoon Hosseini; H.A. Naghdi Badi
Volume 24, Issue 3 , November 2008, , Pages 253-262
Abstract
This study has been conducted in two experiments in order to evaluate salinity tolerance and absorption of salt by Borage (Borago officinalis L.).In first experiment, the effect of salinity on qualitative and quantitative yield of Borage was studied. The treatments were water salinity (Control, 4, 8 ...
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This study has been conducted in two experiments in order to evaluate salinity tolerance and absorption of salt by Borage (Borago officinalis L.).In first experiment, the effect of salinity on qualitative and quantitative yield of Borage was studied. The treatments were water salinity (Control, 4, 8 and 12 dS/m²).The measured parameters were: quantitative yields (percentage of germination, dry and fresh weight of root, stem and florescence, Root/shoot, height and number of flower and leaf per plant) and qualitative yields (content of mucilage, total ash, Na, Cl, Mg, Ca and K in plant tissues). The results indicated that salinity increased content of Na, Cl and total ash in plant tissues. The salinity reduced height, germination percentage, number of flower and content of mucilage, Ca and K. Because of high content of mucilage in plant tissue and stability of yield under salinity conditions, it can be deduced that borage is tolerant to salinity (to 12 dS/m²). High content of Na, Cl, total ash and mucilage is related to accumulation of solutes for osmoregulation that can be used as an index for salinity tolerance in Borage. Second experiment has been conducted to study the absorption of salt by Borage. Measured parameters were Na, Cl, Mg, K and Ca content in soil at pre and post planting of borage. The results indicated that content of Na, Cl, Mg and Ca reduced in soil after planting borage. Regarding the results of this study, it can be suggested that borage can uptake salt from soil and accumulate harmful ions in its plant tissues. Therefore it can be introduced for improvement of saline and sodic soils.
M. Makkizadeh Tafti; R. Tavakol Afshari; N. Majnoon Hosseini; H.A. Naghdi Badi; A. Mehdizadeh
Volume 22, Issue 3 , November 2006, , Pages 216-222
Abstract
In this experiment, the effect of osmopriming on germination percentage and mean time for germination (MTG) of Borage (Borago officinalis L.) seeds was studied. This study had been conducted at Agronomy Department of Tehran University-Karaj during 2004 in four replications in factorial experiment on ...
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In this experiment, the effect of osmopriming on germination percentage and mean time for germination (MTG) of Borage (Borago officinalis L.) seeds was studied. This study had been conducted at Agronomy Department of Tehran University-Karaj during 2004 in four replications in factorial experiment on the base of randomized complete design. The treatments were osmotic potential of polyethylene glycol (PEG) with four levels (Control, -4, -8 and -12 bar) and priming duration with three levels (24, 48 and 72 h). The results indicated that osmotic potential of PEG had significant effect on germination percentage and mean time for germination. According to the results, the highest percentage was in -8 bar concentration. Also priming duration didn’t affect the percentage of germination and mean time for germination. The results indicated that the interaction of osmotic potential and duration was not significant.
