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Lotfalizadeh H.,East Azerbaijan Research Center for Agriculture and Natural Resources
Zootaxa | Year: 2013

Chrysura baiocchii Rosa sp. nov. is described from Iran. Diagnosis of the new species-group Ch. baiocchii and discus-sions on Ch. radians group and Ch. genalis subgroup are given. Copyright © 2013 Magnolia Press.


Lotfalizadeh H.,East Azerbaijan Research Center for Agriculture and Natural Resources | Pourrafei L.,University of Tehran
Zootaxa | Year: 2013

A first checklist of the Iranian Chrysididae is proposed. The list includes 184 species in 20 genera. Seventy species and genera Spinolia Dahlbom, 1854, Spintharina Semenov, 1892, Trichrysis Lichtenstein, 1876 are newly recorded from Iran. New combination is proposed for Chrysura laconiae (Arens, 2001), comb. nov. (from Chrysis) and Chrysura pyrogaster turca (Linsenmaier, 1997), comb. nov. (from Chrysis). New synonymy is proposed for Chrysura barbatula (Linsenmaier, 1968) = Chrysura barbatica Bohart, 1991, syn. nov. The status of Chrysis transcaspica Mocsary, 1889 is resurrected. Historical data with the comments of current taxonomic position and the specific validity of some species are given. Copyright © 2013 Magnolia Press.


Lotfalizadeh H.,East Azerbaijan Research Center for Agriculture and Natural Resources | Bab-Morad M.,Iranian Research Institute of Forests and Rangelands
Turkish Journal of Zoology | Year: 2015

The encyrtid species Copidosoma boucheanum Ratzeburg (Hym.: Chalcidoidea, Encyrtidae) was identified and is reported for the first time from Iran. These specimens were reared from leafroller larvae (Lep.: Tortricidae) on Populus sp. as a polyembryonic endoparasitoid. Copidosoma species of Iran are listed with their distribution. © TÜBITAK.


Bybordi A.,East Azerbaijan Research Center for Agriculture and Natural Resources | Ebrahimian E.,Ferdowsi University of Mashhad
Communications in Soil Science and Plant Analysis | Year: 2013

In the present study, integration of nitrogen (N) and zeolite on growth, photosynthesis, yield and yield components, nitrate reductase activity, and plant nutrient content on canola (Brassica napus L. cv. SLM046) was evaluated during two growing seasons (2010 and 2011) at East Azerbaijan Research Center for Agriculture and Natural Resources, Tabriz, Iran. The experiment was conducted as a 4 × 5 factorial design with three replications. Different levels of zeolite (0, 4, 8, and 12 ton ha-1) and nitrogen (N; 0, 150, 200, 250, and 300 kg ha-1) were added and mixed with soil thoroughly. According to combined analysis of variance, effect of year was significant only on silique number per plant, respiration rate, and iron (Fe) content. Also results indicated that N fertilizer increased plant height, silique number per plant, seed number per silique, 1000-seed weight, and finally seed yield. Similarly, zeolite increased yield and yield components whereas plant height was not affected by zeolite in the second year. Oil yield decreased due to N and zeolite application. In addition, photosynthesis and respiration improved on account of N and zeolite treatments. Nitrate reductase activity significantly was promoted by N and zeolite. Furthermore, micro- and macroelements were affected by N or zeolite application, so that N and zeolite decreased P content whereas N increased N, K, Fe, and zinc. In general our results demonstrated that zeolite application can increase canola growth and production, which may be through increasing N-use efficiency and improving soil physical characteristics. © 2013 Copyright Taylor and Francis Group, LLC.


Bybordi A.,East Azerbaijan Research Center for Agriculture and Natural Resources
Communications in Soil Science and Plant Analysis | Year: 2015

To investigate the effect of exogenous application of silicon and potassium on some physiological responses, yield, and yield components of two wheat cultivars (Pishgam and Alvand) grown under salt-stress conditions, a field experiment was conducted at the Agricultural and Natural Resources Research Centre in East Azerbaijan, Iran, during 2012 and 2013 growing seasons. The experiment was arranged in factorial design based on randomized complete blocks design with three replications in each year. Wheat seeds were sown in saline soil (10 dS m−1) and irrigated with saline water (4 dS m−1). The plants were sprayed with silicon and potassium solutions at 0, 2, and 4 mM and 0, 100, 200, and 300 mM concentrations, respectively. The results demonstrated that silicon and potassium application improved antioxidant enzyme activity, chlorophyll content, photosynthesis rate, potassium uptake, yield, and yield components in both wheat cultivars. Although silicon and potassium had significant effects on all studied traits, there was a great interactive effect between them. When these two elements were applied on plants, the positive effect was more pronounced. Among all treatments, the most effective treatment was 4 mM silicon and 300 mM potassium. The greatest enzyme activity, chlorophyll content, photosynthesis rate, potassium uptake, yield, and yield components and the lowest proline, malondialdehyde, and sodium accumulations were observed in this treatment. © , Copyright © Taylor & Francis Group, LLC.


Bybordi A.,East Azerbaijan Research Center for Agriculture and Natural Resources
Journal of Integrative Agriculture | Year: 2012

The effects of exogenous ascorbic acid and silicium on leaf fresh weigh, seed yield, photosynthesis, changes of the activities of major antioxidant enzymes, nitrate reductase activity, proline accumulation, chlorophyll content, and fatty acid composition were investigated in salt-stressed canola. A hydroponic pot experiment was conducted based on randomized complete block design, factorial arrangement was used with 16 combinations of salinity stress (0, 100, 200, and 300 mmol L -1 NaCl), ascorbic acid (0 and 30 mmol L -1), and silicium (2 and 4 mmol L -1 from potassium silicate) with three replicates. The results showed that salinity significantly decreased leaf area and leaf fresh weight, seed yield, photosynthesis, nitrate reductase activity, chlorophyll content, and seed protein percentage. Conversely, respiration, antioxidant enzymes activity, proline accumulation, and linolenic acid percentage increased due to salt stress. Ascorbic acid application improved photosynthesis and seed yield and mitigated antioxidant enzyme activity. In addition, nitrate reductase activity and chlorophyll a and b were positively affected by ascorbic acid. Regarding silicium application, that was found that leaf area, leaf fresh weight, seed yield and photosynthesis, ascorbate peroxidase activity, nitrate reductase activity, and chlorophyll content increased, while respiration decreased. Furthermore, silicium had not significant effect on antioxidant enzyme activity. In general, ascorbic acid and silicium were involved in the defensive mechanisms against salinity stress and it can be suggested that, ascorbic acid and silicium application had positive effect on canola growth under conditions of salt stress. © 2012 Chinese Academy of Agricultural Sciences.


Ahmad B.,East Azerbaijan Research Center for Agriculture and Natural Resources
Journal of Integrative Agriculture | Year: 2014

Adequate regulation of mineral nutrients might be effective to ameliorate the deleterious effects of salts and help to sustain crop productivity, particularly in glycophytes, under salt stress. In this study, laboratory and greenhouse experiments were carried out at Agricultural and Natural Resources Research Centre in East Azerbaijan, Iran, to investigate the interactive effects of silicon and potassium nitrate in alleviating NaCl induced injuries in wheat (Triticum aestivum L.). In the laboratory experiment, three winter wheat cultivars Pishgam, Afagh and Alvand were grown on sterile filter paper moistened with 20, 40, 60, 80, and 100 mmol L-1 NaCl solution. Results revealed that wheat cultivars were significantly different in their growth response to different concentrations of NaCl and Pishgam was found to be the most tolerant to NaCl stress, and used in the second part of study. In the greenhouse experiment, Pishgam was grown in a hydroponic system subjected to different NaCl levels (20, 60 and 100 mmol L-1) and treated by silicon (0, 2 and 4 mmol L-1, final concentration in nutrient solution using K2SiO3) and potassium nitrate (0, 0.5, 1, and 2 mmol L-1, foliar application). The experimental design was factorial based on a completely randomized design with three replications. It was found that NaCl stress significantly increased proline accumulation and sodium content in the plant tissues while decreased potassium uptake and accumulation by plants. Moreover, plant weight, 100-seed weight, relative water content, chlorophyll content, and photosynthesis were also significantly affected by varying levels of NaCl. However, exogenous application of silicon and potassium nitrate reduced sodium uptake, increased potassium and consequently improved plant weight, 100-seed weight, seed yield, ear length, and photosynthesis rate. This study suggested that utilization of the salt-tolerant cultivar (Pishgam) combined with proper foliar application of potassium nitrate (2 mmol L-1) and silicon (4 mmol L-1) at the wheat booting stage might be a promising approach to obtain higher grain yield on saline lands. © 2014 Chinese Academy of Agricultural Sciences.


Monirifar H.,East Azerbaijan Research Center for Agriculture and Natural Resources
Notulae Botanicae Horti Agrobotanici Cluj-Napoca | Year: 2011

An investigation was carried out using 13 alfalfa accessions during 2009 to 2010 and was located on the experimental field of East Azarbaijan Agriculture and Natural Resources Research Center (AZARAN), Iran. The objective of this research was to evaluate positive effect and reliability of yield and quality traits as selection criteria in alfalfa breeding. Significant differences were observed for most of the yield and quality components. Variability coefficients were high for yield components, while quality traits showed relatively low variation. Plant height (PH), number of stems (NS), number of nodes (NN) and leaf size (LS) was positively correlated with plant yield. Crude protein (CP) content was correlated directly with acid detergent fiber (ADF) and natural detergent fiber (NDF) while correlation with crude fiber (CF) was inverse. The direct effect of the number of stems on yield had the highest value (0.698, P<0.01). Direct effect of number of nodes on yield was positive (0.508, P<0.01). Only the plant height had a lower direct than the indirect effect on yield. The direct effects of independent traits on CP were significant (P<0.05), except for trait leaf dry weight (LDW). The direct effect of ADF had the highest value (2.440, P<0.01), which was positive and significant. LDW trait had a negative direct effect on the CP (-0.248, P<0.05), while the indirect effect on the NDF trait on CP was neither high nor justifiable. ADF, CF, NDF and LDW traits had the highest indirect effects on CP trait via correlation with in vitro dry matter digestibility (IVDMD).


Bybordi A.,East Azerbaijan Research Center for Agriculture and Natural Resources
Life Science Journal | Year: 2012

Salinity is a phenomenon challenging the plantation and growth of grape in arid and semiarid regions. During the present research, tolerance of two grape cultivars (Soltanin and Fakhri) was evaluated against various sodium chloride salinity levels (zero, 50, 100, 150, 200 and 250 mM), which was conducted based on factorial experiment in the form of Randomized Complete Design (RCD) with three replications at Agricultural and Natural Resource Researches Center (ANRRC) of East Azerbaijan, during 2011. Based on the obtained results, the cultivar and salinity levels were significantly effective on morphological and physiological traits. Moreover, the results from analysis of variance revealed the significant effects of salinity levels on rates of chlorophyll a and b; rate of chlorophyll a + b; photosynthesis and transpiration rate; stomatal conductance; dry weight of stem and root; concentrations of elements such as nitrogen, phosphorus, potassium, Chloride; plant height; leaf area; and relative water content (RWC). Furthermore, increased salinity levels led to significant decrease in values of majority of the abovementioned parameters. In contrast, the proline content, sodium and chloride concentrations increased as a result of increasing salinity. In addition, "Salinity × cultivar" interaction also proved significantly effective on traits such as plant height, leaf area, dry weight of stem, proline content, chlorophyll a and b, chlorophyll a + b, photosynthesis and transpiration rate, stomatal conductance, dry and fresh weights of stem and root, nitrogen and sodium content of leaf and RWC. More specifically, the lowest values for the abovementioned parameters were measured at 250 mM sodium chloride salinity level for Fakhri cultivar. Without salinity application Soltanin produced the best values for physiological and morphological indices. In general, Soltanin cultivar proved more tolerant against salinity than Fakhri cultivar did.


Bybordi A.,East Azerbaijan Research Center for Agriculture and Natural Resources
Archives of Agronomy and Soil Science | Year: 2014

The effects of integrated chemical and organic fertilizers on quantitative, qualitative and physiological traits of two canola cultivars were studied in East Azerbaijan Research Center for Agriculture and Natural Resources, Iran, during 2011 and 2012 growing seasons. The first factor comprised six levels of fertilizers including organic, chemical, and their combination and the second factor was two canola cultivars. Fertilizer treatments had significant effect on all studied traits except for proline, oil percentage, oleic acid, linolenic acid, seed sulfur, and potassium content in the first year, and leaf area, protein percentage, 1000 seed weight, seed number in silique, silique number in plants, oleic acid, and linolenic acid in the second year. Canola response to fertilizer proportions was quite different so that in the first year chemical fertilizations were better, while in the second year the effect of organic fertilizations was more pronounced. High level of organic fertilizer improved nitrate reductase activity, photosynthesis, chlorophyll content, and final seed yield in the second year. It seems that the positive effect of cattle manure would be visible at least 1 year after application. Moreover, canola cultivars differed from each other in terms of some agronomic and physiological traits during each year of the experiment. © 2013 © 2013 Taylor & Francis.

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