Rouhollah Motafakkerazad

• Ph.D.
• Professor (Assistant) at University of Tabriz

Polycyclic aromatic compounds (PAHs) are persistent organic pollutants of environmental concern due to their potential impacts on food chain, with plants being particularly vulnerable. While plants can uptake, transport, and transform PAHs, the precise mechanisms underlying their localization and degradation are not fully understood. Here, a cultiv...

BACKGROUND Earlier studies reported that post‐harvest ultraviolet (UV) irradiation could increase the health‐promoting compounds in fruit but the effects of UV irradiation on the reduction of the polycyclic aromatic hydrocarbon (PAH) content in mulberries remain less known. Black mulberry fruit were exposed to two UV illumination dosages (3.5 and 7...

Although all-trans retinoic acid (ATRA) is an efficient pattern in acute promyelocytic leukemia (APL) therapy, further studies are required due to the extant clinical limitations of ATRA. It has been reported that Silymarin, an anti-cancer herbal substance extracted from milk thistle (Silybum marianum), is able to regulate apoptosis in various t...

Polycyclic aromatic hydrocarbons (PAHs), as priority organic pollutants, are capable of accumulation in plants. Phenanthrene (Phe) is one of the most abundant low-molecular-weight PAH in the environment which is commonly used as a model PAH in many phytoremediation studies and as a representative compound for all PAHs group. This paper highlights t...

Redroot pigweed is a well-known allelopathic weed worldwide with diverse organic compounds which involving in its allelopathic interactions as well. Preliminary tests of redroot pigweed extract against leukemia and various human’s phatogenic microorganisms revealed that amaranth extract inhibits the viability and proliferation of NB4 cells in a tim...

p class="042abstractstekst">The impact of combinations of plant growth regulators (PGRs) on callus culture of Satureja sahendica Bornm. was investigated. In nodal explants, the response of secondary metabolite production to different concentrations of PGRs was analyzed regarding the presence and absence of polyvinylpyrrolidone (PVP). The explants w...

Polycyclic aromatic hydrocarbons (PAHs) are widespread organic pollutants which are persistent in the environment. Biodegradation of PAHs is one of the major mechanisms for their removal from environment. However, unlike microorganisms such as fungi and bacteria, the degradation pathways of organic pollutants in plant systems are not completely cle...

The impact of Salicylic acid (SA) and Methyl jasmonate (MJ) on growth, and essential oil quantity and quality in organ culture of Acinos graveolens were investigated. In the present study, nodal segments were used as explants for shoot production using MS media with BA and NAA. Afterward, they were transferred to liquid MS media culture containing...

The properties of nanomaterials such as perlite nanoparticles and their increased application have raised concerns about their probable toxic impacts on the aquatic ecosystems and algae. Here, a novel biochemical synthesis and immobilization of CuO is reported on perlite nanoparticles (CuO/Per-NPs) and its toxic effect on alga has been compared wit...

Polycyclic aromatic hydrocarbons are a group of organic pollutants influencing different aspects of plants physiology. Physiological responses associated with the impact of phenanthrene (500, 1000, 1500, 2000 ppm) were analysed on Panicum miliaceum L. Seed germination was delayed in all treatments and 2000 ppm of phenanthrene (PHE) significantly re...

Redroot Pigweed is a model plant in the allelopathy studies that also has the potential ability to produce allelochemical compounds. The compounds responsible in the allelopathy phenomenon, commonly referred to as allelochemicals, are able to directly or indirectly alter the function of vital proteins. The pathways of indirect effects of allelochem...

Allopathy is one of the most common biotic stresses in agricultural ecosystems, often due to the allopathic activities of weeds. Redroot pigweed is one of the most common weeds in the worldwide which also has potential in allelopathy. Allelopathic stress affects the various aspects of plant's growth and physiology including biosynthesis and biogene...

Histological studies based on anatomical and histochemical changes can significantly contribute to our better understanding of cellular processes as well as how plants respond to biotic and abiotic stresses at different cell and tissue levels. Panicum miliaceum is a well-known crop in Poaceae family, however, there have not been many histological s...

Water deficit is one of the most limiting factors for plant growth and production. Polyamines are osmo-active compounds and have important roles in plant resistance to water limitation. A pot experiment was undertaken in a greenhouse as factorial based on complete randomized block design with three replications to assess the physiological and bioch...

In this study the cucumber and wheat plants were used to clarify the mechanism of redroot pigweed’s allelopathic effects on photosynthesis. In order to reach that goal, plants were cultivated hydroponically, treated by redroot pigweed’s leachate and finally chlorophyll fluorescence and photosynthetic gas exchange parameters, photosynthetic pigments...

In this study the cucumber and wheat plants were used to clarify the mechanism of redroot pigweed's allelopathic effects on photosynthesis. In order to reach that goal, plants were cultivated hydroponically, treated by redroot pigweed's leachate and finally chlorophyll fluorescence and photosynthetic gas exchange parameters, photosynthetic pigments...

Uptake, translocation and accumulation of phenanthrene and pyrene by wheat were studied under controlled conditions. Seeds were cultivated in perlite containing 300 mg kg⁻¹ of phenanthrene and pyrene separately, and plants were grown hydroponically for 25 days. Sampling was performed every five days, and PAHs concentrations in roots and shoots of p...

آللوپاتی به صورت اندرکنش‌های شیمیایی بین گیاهان بوسیله ترشح ترکیباتی موسوم به مواد آللوشیمیایی تعریف می‌شود. این مواد می‌توانند رشد و فرآیندهای فیزیولوژیک گیاهان هدف را تحت تأثیر قرار دهند. پژوهش حاضر با هدف شناسایی ترکیبات شیمیایی موجود در عصاره اتانولی ریشه، ساقه، برگ و گل پیچک صحرایی (Convolvulus arvensis L.) و اثرات آللوپاتیک آن بر رشد و فیزیول...

Allelopathy is an important interaction among plants; especially between weeds and crops. Weeds can decrease crops productions by competition and their allelopathic effects. Redroot pigweed (Amaranthus retroflexus L.) is a common weed in the worldwide with well-known allelopathic potential. In order to evaluation of allelopathic effects of redroot...

سابقه و هدف: خشکی رایجترین عامل تنشزاي غیرزیستی میباشد که بیش از سایر عوامل، رشد و نمو گیاهان را کاهش میدهد. از این جهت، شناسایی عوامل مؤثر در افزایش تحمل گیاهان نسبت به خشکی ضروري است. گیاهان در مقابله با خشکی ترکیبات آنتیاکسیدانی را براي مقابله با تنش اکسیداتیو افزایش میدهند. پلیآمینها بهعنوان تنظیمکنندههاي رشد، نقش مهمی در حفظ تمامیت غشاهاي سلول...

Ziziphora persica (Lamiaceae) has been used as infusions and decoctions in traditional medicine for various purposes such as sedative, carminative, and stomach pain. In the proliferation stage of shoot culture, MS medium was treated with different concentrations of methyl jasmonate (MJ) and salicylic acid (SA) (50, 100 and 150 µM) either individual...

1Background and objectives: Drought stress is the most common abiotic factor which reduces the plant growth and development more than other factors. Thus, identification of the effective factors to increase drought tolerance of plants is necessary. The plants increase antioxidant compounds to overcome the oxidative stress. Polyamines as growth regu...

Polycyclic aromatic hydrocarbons as byproducts of carbon-based fuel combustion are an important group of pollutants with wide distribution in the environment. Polycyclic aromatic hydrocarbons are known as toxic compounds for almost all organisms. Different plant species can uptake polycyclic aromatic hydrocarbons by roots and translocate them to va...

p>Polycyclic aromatic hydrocarbons (PAHs) are a class of organic pollutants effecting different aspects of plants physiology. To assess the physiological responses of plants to PAHs, maize ( Zea mays ) was treated with 25, 50, 75, and 100 ppm of pyrene and after 21 days, the activity of some antioxidant enzymes, malondialdehyde (MDA), total flavono...

Drought stress is the most prevalent abiotic stress in Iran and has highest negative effect on plant growth and productivity. Polyamines as growth regulators play important roles in maintaining cell membrane stability and reducing oxidative stress under drought stress. Many studies suggest that polyamines increase plants tolerance to environmental...

Drought stress is the most prevalent abiotic stress in Iran and has highest negative effect on plant growth and productivity. Polyamines are plant growth regulators that enhance resistance of plants to environmental stresses such as water deficit. In this research, the effect of different putrescine+spermine concentrations (0+0, 40+40, 40+60, and 6...

We conducted an hydroponic experiment to evaluate the physiological aspects of redroot pigweed’s allelopathic effects on cucumber and wheat plants. Plants were cultivated hydroponically in greenhouse on perlite and treated with 0 and 0.25% aqueous extracts of redroot pigweed’s. Aqueous extracts reduced the stomata opening and photosynthetic pigment...

Water deficit is the most common environmental stress factor that is effective on plant growth and development. Polyamines are as growth regulator in plants and increased their tolerance to abiotic stresses such as drought. In this research the effect of foliar application of putrescine (40 and 60 µM) on shoot and root soluble and insoluble sugars...

Background: Drought stress is the most common abiotic stress factor which reduces the plant growth and development more than other factors. For this reason, identification of effective factors to increase drought tolerance of plants is necessary requirement. Many reports have been focused on the involvement of polyamines in plant response to abioti...

Allelopathy is one of the most important interactions among plants in the natural ecosystems and agricultural fields. Weeds could reduce crops yield in farms due to competition as well as their allelopathic effects. Redroot pigweed is one of the most common weeds in the world-wide with well-known allelopathic effects. In order to evaluation of phys...

poster in 20th national and 8th International Congress of Biology, 22-24 Aug, 2018, University of Maragheh, Iran

poster

Allelopathy is a natural phenomenon and an important interaction among plant species. In this investigation, allelopathic effects of yarrow's (Achillea millefolium) different organs aqueous extract were examined on germination and seedling growth of wheat (Triticum aestivum). This examination was conducted as completely randomized design with three...

Allelopathy

Plants affect other species by releasing allelochemicals, this process called allelopathy. Due to allelopathic studies importance, allelopathic effects of two weed species in Azarbaijan-e-Shargi province fields including common mallow (Malva neglecta) and quack grass (Elymus repens) on growth parameters of wheat and cucumber were studied. Leachate...

An in vitro culture of Lallemantia iberica was established for determination of optimum period for shoot production; for this purpose, the effect of thidiazuron (TDZ), as a cytokinin-like phenylurea compound, was investigated on in vitro shoot production and growth of L. iberica during every two weeks until six weeks of culture. TDZ in different co...

Allelopathy is one of the important interactions among plants. Weeds can reduce crops productions in farms by their allelopathic effects. Redroot pigweed (Amaranthus retroflexus L.) is the most common weed in Iran with well-known allelopathic potential. In the presented experiment, the allelopathic effects of redroot pigweed on germination and grow...

Allelopathy is one of the important causes of yield loss due to the weed's invasion. Redroot pigweed (Amaranthus retroflexus L.) is one of the most common weeds in Iran with well known allelopathic effects. This research has been done in order to study of plant species and leachate origin’s effects on allelopathic interaction of redroot pigweed at...

Allelopathy is one of the most important interactions between plants. Weeds are famous plants from this viewpoint, which can decrease crop production in farms by their allelopathic effects. Research has shown that different plant organs have different allelopathic effects. Redroot pigweed (Amaranthus retroflexus L.) is one of the most common weeds...

Lallemantia iberica (Lamiaceae) has pharmaceutical and nutritional importance owing to production of oily seeds and synthesis of commercially secondary metabolites. In the present study, total phenol and flavonoids content and quantitative changes in the shoot and callus pigments of L. iberica were investigated. Moreover, some growth parameters and...

For evaluation of the allelopathic effects of different concentrations (control, 2.5, 5, 7.5 and 10%) of redroot pigweed’s (Amaranthus retroflexus L.) leachate on seed germination and seedling growth of wheat plants (Triticum auestivum L. cv. Pishgham), an experiment was conducted as factorial based on completely randomized design with three repl...

Betanin is a red pigment present in beet root. Recently, potential health benefits of betanin-rich beet root have been suggested. However, little is known regarding the free radical scavenging and antioxidant activity of betanin. Electron spin resonance spectroscopy (ESR) and spin trapping techniques were applied to evaluate the ability of betanin...

Allelopathy is one of the most important interactions between plants. Weeds can reduce crops productions in farms due to their allelopathic effects. Redroot pigweed (Amaranthus retroflexus L.) is the most common weeds in Iran with well known allelopathic effects. In order to classification of most important crops cultivated in Iran, an experiment w...

Allelopathic effects of different concentrations of redroot pigweed’s leachate on germination and seedling growth of wheat (Triticum auestivum L.) was evaluated in this study. This experiment was conducted as factorial based on completely randomized design with three replications under lab conditions. Plant organs were mixed and dried in lab condit...

Allelopathy is the interaction between plants by synthesis and releasing of certain secondary metabolites into the environment. Allelopathic effects of weeds can lead to considerable yield lose of crops. In order to the study of allelopathic effects of redroot pigweed on germination and growth of four important crop species, an experiment was condu...

Arsenic (As) has evoked concerns related to the environmental and human health issues for decades. In recent years, the concern has been relocated to the front position as more of the world’s population relies on groundwater as a source of clean drinking water, which is reported to be contaminated due to the elevated level of arsenic. Arsenic, bein...

α-Lipoic acid (LA) is a naturally occurring disulfide-containing compound used as an antioxidant supplement which also has been used as a medicine for diabetic neuropathy in Europe. Physiologically LA acts as a coenzyme of mitochondrial multienzyme complex in its protein bound form but it is not yet clear how the externally administrated LA is inco...

Lipoic acid (LA) is a cofactor functioning in four multienzymes: pyruvate dehydro-genase, α-ketoglutarate dehydrogenase, branched-chain α-keto acid dehydrogenase, and the glycine cleavage enzyme systems. In each enzyme, LA is covalently bound to the ε-amino group of lysine residues. LA has been used as a medicine for treating di-abetic condition in...