نتایج جستجو برای: and decreased chlorophyll a

تعداد نتایج: 20354946  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1387

boron nitride semiconducting zigzag swcnt, $b_{cb}$$n_{cn}$$c_{1-cb-cn}$, as a potential candidate for making nanoelectronic devices was examined. in contrast to the previous dft calculations, wherein just one boron and nitrogen doping configuration have been considered, here for the average over all possible configurations, density of states (dos) was calculated in terms of boron and nitrogen ...

Journal: :علوم باغبانی ایران 0
رحیم امیری خواه دانشجوی سابق کارشناسی ارشد دانشکده کشاورزی، دانشگاه صنعتی اصفهان نعمت الله اعتمادی دانشیار دانشکده کشاورزی، دانشگاه صنعتی اصفهان شکوفه فرهمند دانشجوی سابق کارشناسی ارشد دانشکده کشاورزی، دانشگاه صنعتی اصفهان علی نیکبخت استادیار دانشکده کشاورزی، دانشگاه صنعتی اصفهان

turf is one of the most important ground covers and it is one of the main elements ofurban landscape design. plant growth regulators, such as growth inhibitors, are widelyused in turfgrass management to suppress shoot growth and inflorescences production.this experiment was conducted to determine the interactive effects of trinexapac-ethyl(te) and salinity on the growth, visual quality, and che...

Journal: :تولید گیاهان زراعی 0
زهرا جوادی پور دانشجوی کارشناسی ارشد گروه زراعت و اصلاح نباتات، دانشگاه یاسوج محسن موحدی دهنوی استادیار گروه زراعت و اصلاح نباتات، دانشگاه یاسوج حمیدرضا بلوچی استادیار گروه زراعت و اصلاح نباتات، دانشگاه یاسوج

to comparison the photosynthetic parameters and leaf chlorophyll content and fluorescence of safflower (carthamus tinctorios l.) cultivars under salinity stress, a pot experiment was carried out as factorial based on completely randomized design with three replications in summer 2011 in university of yasouj. first factor included four salinity levels (zero, 75, 150 and 225 mm (formed as 20 to 1...

Journal: :علوم باغبانی 0
فاطمه سلیمی فرید شکاری جواد حمزه ئی

using plant growth regulators at the stresses environment can improve plant growth and crop production. hence, in this research response of photosynthesis rate, chlorophyll, soluble sugar and flower dry weight of chamomile to methyl jasmonate under different salinity levels was studied. values of 0 (control), 75, 150, 225 and 300μm methyl jasmonate (meja) with salinity levels of 2, 6, 10 and 14...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده زیست شناسی 1388

abstract chickpea is weak in competition of weeds that damages to it at between 40 t0 60 percent. kermanshah province is one of the most important region for chickpea fields in iran. for these reosons, weed management is necessary in this crop. in order to evaluate of herbicides and stubble control on broad leave weeds control in chickpea. experiment was conducted in agricultural research stat...

روشنفکر دزفولی, حبیب الله, ماهرخ, علی, نبی پور, مجید, چوکان, رجب,

This study was conducted to determine some physiological parameters of maize cultivar KSC 704 affected auxin and cytokinin hormones concentration variations under drought stress condition. The experiment was carried out in three environments separately including non-drought stress environment, drought stress in vegetative stage and drought stress in reproductive stage. Cytokinin hormone in thre...

Journal: :یافته های نوین در علوم زیستی 0
فاطمه قاسمی fatemeh ghasemi department of biology, faculty of science, urmia university, urmia, iranگروه زیست شناسی، دانشکدۀ علوم، دانشگاه ارومیه، ارومیه رضا حیدری reza heidari department of biology, faculty of science, urmia university, urmia, iranگروه زیست شناسی، دانشکدۀ علوم، دانشگاه ارومیه، ارومیه رشید جامعی rashid jamei department of biology, faculty of science, urmia university, urmia, iranگروه زیست شناسی، دانشکدۀ علوم، دانشگاه ارومیه، ارومیه لطیفه پوراکبر latifeh poorakbar department of biology, faculty of science, urmia university, urmia, iranگروه زیست شناسی، دانشکدۀ علوم، دانشگاه ارومیه، ارومیه

to assess nickel-induced toxicity in plants, zea mays seeds were germinated and cultured on nutrient solution with nickel concentrations of 0, 50, 100 and 200 μm for a period of two weeks. its effects on the growth, hill reaction and photosynthetic pigments content were then investigated. the fresh and dry weight of leaves and roots increased in 50 μm nickel, but decreased in 100 and 200 μm. th...

تهرانی‌فر , علی, نعمتی, سید حسین, امامی , حجت , ولی زاده قلعه بیگ, اکرم ,

Water stress is a global crisis and is considered a serious threat for agriculture. Superabsorbent polymers, through improving soil physical conditions, prevent moisture stress in arid and semi-arid areas. To evaluate the effects of a natural superabsorbent (bentonite) and a synthetic superabsorbent (A200) on growth of lettuce, a factorial experiment in a completely randomized design with four ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده منابع طبیعی 1391

in this study, the effects of oleothermal modification on physical and mechanical peroperties of fir wood (abeis sp.) blocks were examined. at first, some blocks of fir wood with 5 × 20 × 120 cm dimensions were prepared. the blocks were treated in soybean oil. the effects of 3 factors such as treatments temperature (180and 200 °c), holding time (12 and 15 h) and initial moisture content of wood...

Journal: :بوم شناسی کشاورزی 0
مژگان ثابت تیموری محمد کافی زینب اورسجی کبری اروجی

in order to investigate the effects of corm tunic, corm weight and drought stress on saffron (crocus sativus l.), an experiment was conducted at the greenhouse of ferdowsi university of mashhad, iran. treatment were combination of four corm weights range (2-4, 4-6, 6-8 and 8-10 g), two levels of water availability (100% field capacity and drought) and two levels of corm tunic (natural corm with...

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