Ibrahim Ilker Ozyigit

Marmara University · Department of Biology

ZnO and cadmium (Cd)-doped ZnO (Zn1-xCdxO) nanoparticles with various compositions (0.0 ≤ x ≤ 0.8) were synthesized by sol-gel method. Structural, morphological, and photocatalytic properties as well as blood compatibilities of Zn1-xCdxO nanoparticles were investigated. While X-ray diffraction (XRD) applying the Rietveld refinement method was used...

Plants are the sources of many bioactive secondary metabolites which are present in plant organs including leaves, stems, roots, and flowers. Although they provide advantages to the plants in many cases, they are not necessary for metabolisms related to growth, development, and reproduction. They are specific to plant species and are precursor subs...

This paper aims to predict heavy metal pollution based on ecological factors with a new approach, using artificial neural networks (ANNs), by significantly removing typical obstacles like time-consuming laboratory procedures and high implementation costs. Pollution prediction is crucial for the safety of all living things, for sustainable developme...

Medicinal plants have been used throughout history in the treatment of many diseases in traditional Anatolian folk medicine as well as all over the world. The rapid increase in agricultural and industrial activities due to the increasing population around the world causes air, water and soil pollution, and accumulation of potentially toxic elements...

Background Robinia pseudoacacia L. is a deciduous tree planted almost all around the world for a wide variety of uses such as ornamental in urban ecosystems and forest trees in afforestation. This study aimed to evaluate the genetic diversity of of R. pseudoacacia plants planted in urban ecosystems using R. pseudoacacia genotypes collected from Ist...

Starfish (Asteroidea: Echinodermata) shows a worldwide distribution from the poles to the tropical waters and from the shallow-waters to the deep oceans and affects population dynamics as a widespread predatory species. Starfish known as a model organism is widely studied in many research areas including as evolutionary biology, conservation biolog...

Cadmium (Cd) is one of the most toxic heavy metal and its accumulation causes occurring of serious damages to the environment as well as plant growth. Aluminium (Al) is another phytotoxic metal and its pile-up leads to major agricultural problems in the acidic soils. The present work was performed in order to investigate the impacts of Al and Cd ac...

This research is to predict heavy metal levels in plants, particularly in Robinia pseudoacacia L., and soils using an effective artificial intelligence approach with some ecological parameters, thereby significantly eliminating common defects such as high cost and seriously tedious and time-consuming laboratory procedures. In this respect, the arti...

Intensive production of fruits and vegetables causes heavy metal accumulation. Consumption of this kind of foodstuff is a growing concern of the modern world with the additional distress of the supply of enough foodstuffs. To contribute to this global purpose, this research aimed to find out the mineral nutrient and heavy metal concentrations of co...

Due to its economic worth, cotton (Gossypium hirsutum L.) is grown in almost 70 countries and provides income for more than 250 million people. Therefore, producing cotton with having some desired characteristics that includes extended biotic and abiotic stress tolerance, improved fiber quality, promoted nutritional content and increased yield is t...

Cotton is a product that provides wealth for humanity with its widespread and compulsory usage, and alongside creating employment opportunities in the producer countries. Due to the availability of suitable land for agriculture, seven countries including Turkey produce close to 80% of cotton worldwide. The average cotton yield in Turkey is above th...

The present study focused on the heavy metal and essential element contents that were detected in 37 different plants for making assessments to reveal possible heavy metal contamination and its effects on plant and human health. These plants having medicinal properties are used widely in the southeast part of Turkey. ICP-OES was employed for the de...

The aim of this paper is to decide on heavy metal levels based on ecological parameters by effectively eliminating common disadvantages such as high cost and serious time-consuming laboratory procedures via an effective artificial intelligence approach. Therefore, this study is hinged on an artificial intelligence technique, ANN, because of its low...

Kyrgyzstan still suffers from the past practices of radioactive industry operated by the Soviet Union that caused significant impact on ecosystems in this region, especially related with storage of uranium in inadequate conditions. There are at least 50 abandoned sites used as radioactive waste dumps in the country. Due to the pressure of natural a...

A case study performed in Küçükçekmece Lagoon channel/Istanbul, Turkey: how the heavy metal contamination and the seasonal variations on phytoplankton composition influence water quality a b s t r a c t In this work, the experiments related to seasonal variations of phytoplankton composition and heavy metal contamination along with some water quali...

Hypericum triquetrifolium Turra is an ecologically, medicinally and economically important species in Tunisia. Thirty-six Hypericum individuals sampled from 6 northern Tunisian locations were investigated for their diversity and relationships using 10 inter-simple sequence repeats (ISSR) markers and 10 morphological features at vegetative stage. Th...

In this study, the level of water pollution in Lake Terkos, one of the important drinking water resources of Istanbul Metropolitan, was examined by determining the phytoplankton distribution , some physicochemical parameters, nutrients and heavy metal concentrations. For this purpose, samples were collected from eight sampling stations in March and...

In this study, to determine whether having potential to be used as hyperaccumulator for Cd and Ni, numerous experiments were designed for conducting assessments for physiological and genotoxic changes along with defining possible alterations on mineral nutrient status of Lemna minor L. by applying Cd-Ni binary treatments (0, 100, 200 and 400 µM). O...

Leafy vegetables are important components of the human diet for providing mineral nutrients. However, due to the tendency of metal accumulation, metal contents of leafy vegetables need not only to be determined but also estimated health risk for revealing possible health effects on humans. The aims of this study are (I) to examine comprehensive con...

Nowadays, increased population and traffic density, together with the development of industry, caused increasing levels of heavy metals releasing to the environment, and environmental pollution has reached its highest level worldwide. Chemical products, fertilizers, industrial dyes, construction materials, silver dental fillings and vaccines are so...

Amaranthus retroflexus L., Convolvulus arvensis L., Cynodon dactylon (L.) Pers. var. villosus, Datura stramonium L., Echinochloa crus-galli (L.) Beauv and Portulaca oleracea L. are weeds commonly seen in agricultural fields. Weeds pose serious threat to agricultural production. This study focuses on mineral nutrient uptake competition arisen betwee...

In recent years, high-yield production has gained importance due to the decrease in agricultural fields in the world and the rapid increase in the population. Cotton is an important source of income for farmers worldwide and is an important crop, especially for the textile industry. Bt-cotton technology, which entered our lives in 1996, has been qu...

Contamination by heavy metals including As, Cd, Co, Cu, Fe, Hg, Mn, Ni and Zn in agricultural fields is a global safety issue. Indeed, excessive accumulations of metals have detrimental effects on life by altering cell components such as lipids, proteins, enzymes and DNA. Phytoremediation appears as a solution to remove metals from contaminated sit...

Heavy metal stress has marked effects on some growth parameters, physiology, anatomy, and genetics of plants. Among heavy metals, cadmium (Cd) is an extremely toxic one and effects living organisms at even low concentrations. The presence of Cd in air, water and soil and its accumulation in plants create significant negations such as cancer, renal...

In this study, sixteen genotypes selected from walnut-fruit forests in the Osh and Jalal-Abad regions of Kyrgyzstan evaluated for nut properties and chemical composition. The nut traits such as nut dimension, nut and kernel weight, kernel ratio, and shell thickness were investigated. The ash, protein, oil, carbohydrate content and fatty acid compos...

In this study, sixteen genotypes selected from walnut-fruit forests in the Osh and Jalal-Abad regions of Kyrgyzstan evaluated for nut properties and chemical compositions. The nut traits such as nut dimension, nut and kernel weight, kernel ratio and shell thickness were investigated. The ash, protein, oil, carbohydrate content and fatty acid compos...

In this study, sixteen genotypes selected from walnut-fruit forests in the Osh and Jalal-Abad regions of Kyrgyzstan evaluated for nut properties and chemical composition. The nut traits such as nut dimension, nut and kernel weight, kernel ratio, and shell thickness were investigated. The ash, protein, oil, carbohydrate content and fatty acid compos...

The life sciences include the branches of science that are concerned with scientific studies of living organisms' such as human beings, animals, plants and microorganisms. In fact, all life sciences are biology based sciences and from the beginning of the scientific and technological researches up to date, the obtained scientific data, especially i...

Medicinal plants have been used for treatment of many diseases since the ancient times with traditional knowledge being transferred from generation to generation. However, in recent years, many natural habitats have been contaminated due to increased anthropogenic activities. Plants which are exposed to heavy metal toxicity may experience several s...

In this study, genetic diversity and phylogenetic relationships of 22 cotton (Gossypium hirsutum L.) lines widely cultivated in Turkey were investigated. For this purpose, 20 ISSR primers were used, and five of which generated amplification products. The polymorphic locus ratio was calculated as 87.21% and a moderate level of genetic diversity was...

The objective of this study is to synthesize ZnO and Mg doped ZnO (Zn1−x Mgx O) nanoparticles via the sol-gel method, and characterize their structures and to investigate their biological properties such as antibacterial activity and hemolytic potential.Nanoparticles (NPs) were synthesized by the sol-gel method using zinc acetate dihydrate (Zn(CH3...

Boron (B) is an essential plant micronutrient but studies regarding its transport are still limited to a few plants. This work identified two major B transport sequences in plants, NIP5;1 boric acid channel protein and BOR1 transporter. 80 BOR1 and 34 NIP5;1 homologs were identified in 18 different plant genomes. BOR1 homologs had a HCO3-transporte...

In Laboratory bioassays and Pot culture, we determined the effects of aqueous extracts of 7-allelopathic crops [Alfalfa (Medicago sativa L.), Sorghum (Sorghum bicolor L.), Sunflower (Helianthus annuus L.), Rape (Brassica napus L.), Rye (Secale cereal L.), Barley (Hordeum vulgare L.) and Oat (Avena sativa L.)] on the seedling growth of weed Hypericu...

Developing gene transfer technologies enables the genetic manipulation of the living organisms more efficiently. The methods used for gene transfer fall into two main categories; natural and artificial transformation. The natural methods include the conjugation, transposition, bacterial transformation as well as phage and retroviral transductions,...

Advanced marker technologies are widely used for evaluation of genetic diversity in cultivated crops, wild ancestors, landraces or any special plant genotypes. Developing agricultural cultivars requires the following steps: (i) determining desired characteristics to be improved, (ii) screening genetic resources to help find a superior cultivar, (ii...

Aluminum (Al) is one of the most important stress factors that reduce plant productivity in acidic soils. Present work thereby analyzed Al-induced genomic alterations in Bryophyllum daigremontianum clones using RAPD and ISSR markers, and investigated responding changes in photosynthetic pigment (chlorophyll a, b, a/b, total chlorophyll and caroteno...

Thionins are one of the most important anti-microbial peptides in broad-range plant defense. A number of studies are present regarding the structural and biological role of mature thionins but preproprotein forms of these molecules have not been extensively studied. Thus, this study aimed to comparatively analyze a total of 56 thionin prepro-protei...

In this study, mineral nutrient and heavy metal (Al, Ca, Cd, Cu, Fe, K, Mg, Mn, Na, Ni, Pb, and Zn) contents of the walnut kernels and their co-located soil samples collected from the four different zones of natural walnut forests (Sary-Chelek, Arslanbap, and Kara-Alma in Jalal-Abad Region and Kara-Shoro in Osh Region) in Kyrgyzstan were investigat...

This physiological and ecological study was performed on Centaurea consanguinea DC. to acquire information about certain characteristics (bioclimatic, edaphic, topographic, biotic etc.) of its habitat and distribution in Turkey, determine the requirements for germination, explore the plant-soil relations and obtain data on certain aspects of its po...

Plants employ various defence strategies to ameliorate the effects of heavy metal exposures, leading to re-establishment of metal homeostasis. One of the strategies includes the biosynthesis of main heavy metal detoxifying peptides phytochelatins (PCs) by phytochelatin synthase (PCS). In the present study, 14 PCS homologues were identified in the g...

Although stresses induce generation of reactive oxygen species (ROS), which are highly reactive and toxic, and cause severe damage to cellular components; plants have very efficient enzymatic ROS-scavenging mechanisms. Despite the substantial knowledge produced about these enzymes, we still have limited knowledge regarding their expression patterns...

A set of 17 Turkish rice (Oryza sativa L.) varieties (TRVs) were characterized using inter simple sequence repeat (ISSR) markers to study genetic diversity. Also, the sequences of trnL (UAA)-F (GAA) intergenic spacer (IGS) regions were used to evaluate the phylogenetic relationships of TRVs. According to ISSR data, the observed number of al-leles (...

The use of plants in treatments has been as old as humanity and it has preserved its popularity for centuries til now because of their availability, affordability and safeness. However, despite their widespread use, safety and quality issues have been major concerns in the world due to industrial- and anthropogenic-based heavy metal contamination r...

ABSTRACT Cirsium species have economic importance because of their botanical and medicinal properties. Thus, this study has aimed to investigate some heavy metal (Fe, Mn and Zn) and mineral nutrient (B, Ca, K, Mg and Na) status of narrow endemic Cirisum byzantinum. Plant and soil element concentrations were analyzed by using ICP-OES and the evaluat...

In this study, mineral nutrient and heavy metal (Al, Ca, Cd, Cu, Fe, K, Mg, Mn, Na, Ni, Pb, and Zn) contents of the walnut kernels and their co-located soil samples collected from the four different zones of natural walnut forests (Sary-Chelek, Arslanbap, and Kara-Alma in Jalal-Abad Region and Kara-Shoro in Osh Region) in Kyrgyzstan were investigat...

Plants are endowed by a resilient developmental program enabling them growth, reproductive success, and response to many environmental challengers which are primarily modulated at transcriptional level via a myriad interactions of transcription-associated proteins (TAPs). TAPs are categorized into three groups based on the roles in transcriptional...

In the present study, we have comparatively analyzed PR10 genes and proteins from 28 plant species in order to understand the relationship (conservation or divergence) between different PR10s in various plant species. In analyzed species, PR10 proteins were found to be small (157-166 aa long and 14.3-18.2 kDa weight) and acidic (4.69-6.17) in natur...

In this study, plant (leaf, branch and bark) and soil samples of nettle tree were collected from 40 different localities in Istanbul, Turkey, to investigate the heavy metal pollution levels as well as to understand the employability of this plant species in pollution monitoring. Besides, the importance of pollution sources and their distance to the...

This study aimed to improve current understanding on ethylene-insensitive 3-like (EIL) members, least explored in woody plants such as poplar (Populus trichocarpa Torr. & Gray). Herein, seven putative EIL members were identified in P. trichocarpa genome and were roughly annotated either as EIN3-like sequence associated with ethylene pathway or EIL3...

Silicon (Si) is a nonessential, beneficial micronutrient for plants. It increases the plant stress tolerance in relation to its accumulation capacity. In this work, root Si transporter genes were characterized in 17 different plants and inferred for their Si-accumulation status. A total of 62 Si transporter genes (31 Lsi1 and 31 Lsi2) were identifi...

Sulfite oxidase (SOX) is a crucial molybdenum cofactor-containing enzyme in plants that re-oxidizes the sulfite back to sulfate in sulfite assimilation pathway. However, studies of this crucial enzyme are quite limited hence this work was attempted to understand the SOXs in four plant species namely, Arabidopsis thaliana, Solanum lycopersicum, Popu...

Heavy metal pollution in coastal regions has become a serious problem due to significant environmental degradations. In the present study, an algal species, U. lactuca, was investigated to assess the impact of heavy metal pollution on the six different locations along the coastal line of the Sea of Marmara in Istanbul. Heavy metal and mineral nutri...

Physiological responses were investigated in two cotton cultivars grown under various concentrations of sodium chloride (NaCl) in order to determine the degree of the tolerance of the cultivars to salt stress and understand physiological responses with respect to utilization of mineral nutrients. After germination of the seeds of cotton cultivars,...

The essentiality of 14 mineral elements so far have been reported in plant nutrition. Eight of these elements were known as micronutrients due to their lower concentrations in plants (usually ≤100 mg/kg/dw). However, it is still challenging to mention an exact number of plant micronutrients since some elements have not been strictly proposed yet ei...

In this study, Myxomycetes samples were collected from Hatay Province of Turkey on various occasions during 2016. As a result of field and laboratory studies, three rare Myxomycetes species were reported for the first time from Turkey. These species are; Physarum murinum A. Lister, Physarum schroeteri Rostaf and Reticularia intermedia Nann.-Bremek....

Main conclusion Solanum tuberosumgenome analysis revealed 12StSULTRgenes encoding 18 transcripts. Among genes annotated at group level (StSULTRI–IV), group III members formed the largest SULTRs-cluster and were potentially involved in biotic/abiotic stress responses via various regulatory factors, and stress and signaling proteins. Employing bioinf...

In this study, some autecological characteristics of Cephalaria taurica were investigated. In this context, plant and soil samples were collected from two different elevations (loc. 1, 1100 m and loc. 2, 200 m) of Kızıldağ in Amanos Mountains, Hatay/Turkey. Mineral element distribution in soil and plant samples were measured, and physical and chemi...

A transcription factor DREB1A (dehydration-responsive element-binding 1A) gene was amplified and sequenced from the common bean (Phaseolus vulgaris). PvDREB1A had a 777 base pairs (bp) open reading frame (ORF) encoding a protein of 225 residues. The protein sequence contained a conserved DNA-binding AP2 domain of about 60 residues and a nuclear loc...

In this study, the antimicrobial and antioxidant activities of root methanolic extracts of Glycyrrhiza glabra var. glandulifera (Waldst. & Kit.) Boiss. (Fabaceae) were investigated. Plant samples were collected from different habitats in the East Mediterranean part of Turkey. The plant extracts were evaluated for antimicrobial activities against ni...

Squalene synthase (SQS, EC 2.5.1.21) is a major enzyme in biosynthesis of isoprenoid (farnesyl pyrophosphate (FPP) squalene). In the present study, we have analyzed SQS enzymes of black cottonwood (Populus trichocarpa, hereafter Pt) and Masson’s pine (Pinus massoniana, hereafter Pm) using bioinformatics tools. PtSQS and PmSQS sequences were found t...

Among major reactive oxygen species (ROS), hydrogen peroxide (H2O2) exhibits dual roles in plant metabolism. Low levels of H2O2 modulate many biological/physiological processes in plants; whereas, its high level can cause damage to cell structures, having severe consequences. Thus, steady-state level of cellular H2O2 must be tightly regulated. Glut...