مقالههای Ahmad Asgharzadeh
توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقالههای نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده میشوند.
۱The Effect of Plant Growth–Promoting Rhizobacteria on Growth and Physiological Characteristics of Corylus avellana Seedlings
اطلاعات انتشار: ECOPERSIA، چهارم،شماره۳، Summer ۲۰۱۶، سال ۰
تعداد صفحات: ۹
The effects of plant growth promoting rhizobacteria (PGPR) on growth and physiological characteristics of seedlings Corylus avellana were determined in a forest nursery. For this purpose, in a completely randomized design (CRD) and four replicates, three putative bacteria, including Pseudomonas putida, Bacillus subtilis and Enterobacter cloacae, as alone and mixed, were examined. The greatest height (26.88 cm), collar diameter (7.11 mm), leaf area (23.87 cm2)net photosynthesis (17.23μmol CO2 m−2s−1), transpiration rate (3.22 mmol H2O m−2s−1(, stomatal conductance (0.189 mol CO2 m−2s−1), water use efficiency (5.33 μmol CO2 mmol−1 H2O) and chlorophyll content (26.16 SPAD) allocated to seedlings inoculated with a combination of three bacteria. The greatest root dry weight (3.98 g), root volume (10.87 cm3), total plant dry weight (9.91g) was detected in seedlings inoculated with P. putida. In total, for the beneficial effects of PGPR on growth and physiological traits of C. avellana seedlings, all three bacteria either as individual or as mixed were found suitable for seedling inoculation. In fact, it is affirmed that inoculation of root with PGPR can be a proper approach to produce healthy and strong seedlings in nursery.
۲Evaluation of Total Phenolic Content and Antioxidant Activity in Ten Selected Mahaleb (Prunus mahaleb L.) Genotypes
نویسنده(ها): Seyedeh Faezeh Taghizadeh، Ahmad Asgharzadeh، Javad Asili، Amirhossein Sahebkar، Abolfazl Shakeri
اطلاعات انتشار: International Journal of Horticultural Science and Technology، دوم،شماره۲، Autumn ۲۰۱۵، سال ۰
تعداد صفحات: ۱۱
Mahaleb (Prunus mahaleb L.) is an important rootstock for P. avium and P. cerasus cultivars. The present study has compared the phenolic contents and antioxidant activity of the methanolic extracts of the barks, leaves and fruits of ten selected mahaleb genotypes. The total phenolic content (5.11–131.77 mg GA g–1) in barks and the total flavonoid (54.06–180.6 mg QE g–1) and proanthocyanidin (8.89–25.33 mg CA g–1) contents in fruits were greater than the other parts of the plants. The maximum contents of total phenol and total proanthocyanidin were in the stem bark and fruit of the genotype '249' (131.77 mg GA g–1, 25.33 mg CA g–1, respectively), while the maximum contents of flavonoid, and anthocyanin were in the fruits of genotype 271 (180.6 mg QE g–1 and 260.81 mg CY g–1, respectively). Antioxidant activity of the samples was determined using the 1,1–diphenyl–2–picrylhydrazyl (DPPH) and reducing power assay (RPA). The antioxidant activity was the highest with the genotype '249', which showed 80.9% and 89.3% in DPPH and RPA assays, respectively. This study showed that total phenolic, flavonoid, proanthocyanidin, and anthocyanin contents were affected by mahaleb genotypes. This information may be of assistance in the production of mahaleb genotypes with maximum levels of desired phenolic.
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