Papers by Prof.Dr. Hakan Ulukan
Pakistan Journal of Biological Sciences, Feb 1, 2012
Plant Systematics and Evolution, May 26, 2009
Agriculture is the most intensive form of environmental exploitation performed by mankind. It inv... more Agriculture is the most intensive form of environmental exploitation performed by mankind. It involves replacing the natural ecosystem with an artificial plant community comprising one or more crop species, and weeds can invade the cleared land. Initially, the adoption of agriculture did not necessarily imply an improvement in standard of living (there is, in fact, evidence to the contrary), but as agricultural efficiency improved, surpluses were generated on top of mere subsistence levels. It may take many years of labor in order to obtain a crop that has all of the desired traits. It is not possible to control which genes are transferred from the parents to the offspring, and the results are often uncertain. In comparison, the utilization of genetic engineering to improve crops can be a faster and more precise approach. Unlike traditional breeding, genetic engineering makes it possible to select the specific traits desired and insert the genes that code for them into the plant.
International Journal of Agriculture and Biology, 2020
Ankara Üniversitesi çevrebilimleri dergisi, 2010
It was investigated the effect of global climate change and greenhouse gases on plants which were... more It was investigated the effect of global climate change and greenhouse gases on plants which were grouped as cultivated and related information was given. As known, agricultural sector is very sensitive to the global climate change, GHGs and their interactions. Especially, this formation is very effective on flora and fauna. On the other hand, agriculture is the second largest industrial contributor to the GHGs. It is likely to get affected positively and negatively by the climate change, but negative effects are feared to be than the positives. They contribute to unwanted effect(s) through the emission of Carbon dioxide (CO 2), Methane (CH 4), Nitrous oxide (N 2 0), Chlorofluorocarbons (CFCs), etc. gases. Especially, from them CH 4 has the highest global warming potential that is about 300 times than the potential of CO 2 , and about 20 times than that of the N 2 0. According to research findings, it is being informed that the average temperature of the Earth would be rise up to (1.4-5.8 0 C) by 2100, and, various agricultural ecosystems (poly, mono and mixed) including agro-forestry, agro-silvopastoral systems, landscape, aquaculture, rangelands, wetlands and fallowlands, etc. many components will affect from this at various levels. Similarly, increases in concentration of CO 2 gase will increase plant growth and water use efficiency (WUE) or consumption, reduces grain filling and nutrient use-efficiency. The purpose of the paper is state of the relationships among global climate change, greenhouse gases (GHGs) and cultivated plants.
International Journal of Botany, Mar 15, 2008
Journal of Biological Sciences, Nov 1, 2009
Engineering sciences, Oct 1, 2018
The field crops, like all other cultivated plants, are very sensitive to the CC with its insepara... more The field crops, like all other cultivated plants, are very sensitive to the CC with its inseparable components as known greenhouse gases (GHGs') emissions which were composed of CO2, CH4, N2O, Water Vapor, CFCs, etc.. For instance, rice (Oryza sativa) crop plant takes the biggest share of 94% from the GHGs emissions as CH4. As a strong member of the Green House Gases (GHGs) emission, the CH4 has 300 times higher efficiency than the CO2 and 20 times strong in this respect than the water vapour (or H 2 O) in the atmosphere. As known, the most dangerous of GHGs is the CO2 for the all living organisms and nonliving things. The GHGs emission has positive-up to one degree-(the CO2 fertilization, etc.) and/or negative (acid rains, fog, floods, hail, etc.) impacts on flora. According to scientific research findings, the world's mean temperature (1.4-5.8 o C) will rise by the end of the year of 2100 and affect the many plants, ecologies, ecosystems and climatological parameters as locally or regionally or continentally. Particularly, climate change will increase of the field crops' growth and development stages, water use efficiency (WUE) balance(s), accelerates the ripening, reduces the yield (dry matter) and nutrient input/taken, etc. with another morphologic, phenologic, metabolic and biochemical traits.
Pakistan Journal of Biological Sciences, Dec 1, 2007
23rd International Scientific-Experts Congress on Agriculture and Food Industry, Izmir, Turkey, 27-29 September 2012., 2013
It is accepted that one of the most important environmental problems of the present century will ... more It is accepted that one of the most important environmental problems of the present century will be climate change. This will give rise to changes in weather patterns, and an increase in the frequency and severity of extreme events such as flooding and drought. In Turkey as in the rest of the world, global climate change will be cause an increase in the severity and frequency of heat waves, sea level rise, and extreme rainfall and flood events in some regions but increased drought in others, in a way that will directly affect living conditions. In a study of 87 countries by the WMO, Turkey was one of 74 the countries affected by drought. According to various climate models, the East Mediterranean Basin and the subtropical zone which includes Turkey will be experienced a reduction in rainfall especially in winter, but with changes in the duration and severity of rainfall, both flooding and drought are likely. On the other hand, studies on water resources have shown that many catchments' areas of the country will be experienced serious water shortages. Turkey is not rich country in water usage. It has around 1500m 3 per person per year of available water amount, which is expected to fall down to 1000m 3 per year with the climate change and the current rate of growth. As the largest user of water, the agricultural sector is expected to be affected by global climate change more than the other sectors. In this study global climate change and its impact on Turkey's agriculture and water resources will be evaluated.
International Journal of Agriculture and Biology, 2011
World previously underwent four major disasters and another disaster is expected due to rapidly o... more World previously underwent four major disasters and another disaster is expected due to rapidly occurring climate change. The majority of rays of light, which reach the ground from the sun in (6-8 min) cause greenhouse effect and increase the earth temperature since they are not reflected back. With climate change, polar ice-caps melt and flow into the ocean, the level of the sea raises, fresh water reserves are decreasing (due to the increase of salt water) and ecosystem components, which are essential for life and biological diversity are eroding. The organisms are forced to migrate to regions, which are lowly affected by climate changing. The resulting species and habitat shifts result in some organisms (Tarantula spp., Castanea spp., Malus floribunda, etc.), whose natural habitat is humid regions, such as tropical and coastal regions, can be encountered in temperate and inland regions (e.g., Turkey). Many great and famous lakes and wetlands disappeared (e.g., Aral, Salda, Meke Lakes) and snow and ice on many mountains has melted (e.g., Mount of Kilimanjaro, Ilgaz Mountains, etc.) in the world. Similarly, the effects of climate change on cultivated plants (C3, C4, CAM) are dramatic and this issue has been examined physiologically and agronomical. It is suggested that concerned institutions should immediately develop necessary plans, programs and collaborative mechanisms to combat climate change effects. © 2011 Friends Science Publishers
Acta Agriculturae Scandinavica Section B-soil and Plant Science, Mar 1, 2011
Variation in plant populations is very important for plant breeders. The basic aims of plant bree... more Variation in plant populations is very important for plant breeders. The basic aims of plant breeding are ‘high yield, high quality and quantity, extension of adaptation ability to climate and soil conditions and tolerance or resistance to pests and diseases’. Plant breeders use the genetic variations between plants to attain these objectives. Successful adaptation to environmental conditions and success in
Pakistan Journal of Biological Sciences, Feb 1, 2012
Pakistan Journal of Agricultural Sciences, 2015
Response of rice (Oryza sativa L. cv. Osmancık-97) to eight salinity (NaCl) levels (0, 2, 4, 8, 1... more Response of rice (Oryza sativa L. cv. Osmancık-97) to eight salinity (NaCl) levels (0, 2, 4, 8, 12, 16, 20 and 24 dS m-1) was studied at germination and early seedling stages during 2013. Surface sterilized seeds were germinated at 25 ± 1°C for 14 days in a growth chamber and measurements were taken at 3, 6, 12, 24, 36, 48 and 72 h for water uptake of seeds. Germination was completely arrested at 20 and 24 dS m-1 salinity levels. While mean germination time increased with increasing salinity, water uptake, germination rate, coleoptile length and shoot length were significantly decreased. Root number, root length, shoot length, root fresh weight, root dry weight, shoot fresh weight and shoot dry weight significantly increased up to 4 to 8 dS m-1 , and then these characters were significantly decreased by increasing salinity level. It was concluded that rice cultivar viz. Osmancık-97 has tolerance up to a salinity level of 8 dS m-1 at the germination and early seedling stages.
Bircok aycicegi (Helianthus annuus L.) cesidi Rusya, Arjantin, Avustralya, Hindistan, Ukrayna, Tu... more Bircok aycicegi (Helianthus annuus L.) cesidi Rusya, Arjantin, Avustralya, Hindistan, Ukrayna, Turkiye, ABD gibi bazi ulkelerde basariyla yetistirilmektedir. Bu durum bitkide adaptasyon esnekliginin oldukca genis oldugunu; tohum verimi, tohum yag orani, yag asitlerinin kompozisyonu gibi ozelliklerinin cesit ve ekim zamanina karsi duyarli oldugunu gostermektedir. Ornegin, gec yapilan ekim, ayciceginde verimini sidettle azaltmaktadir. Ayrica bu ozellik, yag verimi icin baslica varyasyon kaynagini olusturmaktadir. Ote yandan, aycicegi tariminda kullanilacak cok sayida cesit bulunmaktadir. Her seyden onemli olarak bu cesitlerin ilgili tarimsal ozelliklerini bilmek ve en uygun zamanda ekimi gerceklestirmek basarili bir aycicegi yetistiriciligi icin son derece onemli bir faktordur.
Wheat Information Service, 1999
Ankara Universitesi Ziraat Fakultesi Kenan Evren Arastirma Uygulama Ciftligi ve Tarla Bitkileri B... more Ankara Universitesi Ziraat Fakultesi Kenan Evren Arastirma Uygulama Ciftligi ve Tarla Bitkileri Bolumu deneme tarlasinda 1990 yilinda yurutulen bu arastirma; Bezostaja-I, Haymana 79, Gerek 79, Cakmak 79 ve Kunduru 1149 cesitlerine uygulanan uc farkli sira arasi acikligi (5, 10, 17.5 cm) ve sira uzeri sikliklarinin (ekmekliklerde 4.7, 2.2, 1.2 cm, ma karnaliklarda 3.8, 1.8, 1.0 cm) ilk gelisme, kardeslenme, ve rim ve verim ogelerine etkisini irdelemek amaciyla yapilmis tir. Bolunmus parseller deseninde duzenlenen denemeden elde edilen sonuclar soyledir: Ekim sikliklari cikis tarihini etkilememis, parsel deki bitki sayisi 192-286 arasinda saptanmis, embriyonal kok sayisi cesitlere gore degisiklik gostermis, embriyonal kok uzunlugu 85.44 mm-108.03 mm arasinda bulunmus, adventif kok sayisi 2.23-3.0 arasinda degismis, adventif kok uzunlugu 54.99 mm-67.06 mm arasinda saptanmis, kardeslenen bitki sayisi 21-52 arasinda belirlenmis, altparselde Brom sayisi 10-12 arasinda degismis, bitki boyu 49.32 cm-70.02 cm arasinda bulunmus, ba sak uzunlugu 62.66 mm-79.66 mm arasinda olmus, basakta basak - cik sayisi 17.65-24.65 arasinda degismis, basakta dane sayisi 21.90-28.16 arasinda saptanmis, bitki dane agirligi 1.119- 1.416 g/bitki olarak belirlenmis, 1000 dane agirligi 22.56 g -42.05 g arasinda degismis, m2,deki dane verimi 150.67 g/m2- 187.44 g/m2 arasinda saptanmistir.Abstract In this research study which was carried out in Kenan Evren Research and Application Farm of Faculty of Agri culture, University of Ankara and Field Crops Department trial field in 1990; the effect of between and on row distance on the first development, tillering, yield and yield components of five breed cultivars (namely, Bezostaja-I, Haymana 79, Gerek 79, Cakmak 79 and Kunduru 1149, as common and durum wheat varieties, respectively) were investigated. The cultivars were the major plots, between row distances (5, 10, 17.5 cm) and on row distances (4.7, 2.2, 1.2 cm and 3.8, 1.8, 1.0 cm as common and durum wheat varieties) were sub-plots, respectively. Ex periment was designed -split plots. Results of the study can be summarized as follows: Seed rates were not effected date of emergency, number of plants/plot were fixed between 192-286, number seminal roots/plants was varied in used cultivars, length of seminal root/plants was varied between 85.44 mm - 108.03 mm, number of adventitious roo t /pi ant s was varied between 2.23-3.0 length of adventitious root/plants was fixed between 54.99 mm- 67.06 mm, number of tillering plants were determined between 21-52, number of downy Brornes at sub-plots were varied 10-12, plant height was found between 49.32 cm - 70.02 cm, length cf spike was varied between 62.66 mm - 79.66 mm, number of, Spikelet/spike was varied between 17.65-24.65, number of kernel/spike was fixed between 21.90-28.16, grain yield/plan was determinated between 1.119-1.416 g/plant, 1000 kernel weight varied between 22.56 g - 42.05 g, grain yield/m2 was fixed between 150.67 g/m2- 187 g/m2.
Journal of Selcuk University Natural and Applied Science, Oct 26, 2013
Increase in the environmental problems nowadays is a generally accepted, indisputable reality. Th... more Increase in the environmental problems nowadays is a generally accepted, indisputable reality. The main environmental problems in our country, and likewise around the world, include air pollution, water pollution, pollution being caused by pesticides, and noise pollution. However, all these problems work against the currently possessed natural resources, in other words, they cause a totally adverse impact, by which the natural resources are diminished both quantitatively, and qualitatively as well. That is why, permanent and effective solution(s) should be adopted from the point of the sustainability of the gradually diminishing natural resources. Phytogenetic bio-fuels have begun to be produced and used within this context, so as to reduce environmental pollution in particular. Thus, it is also known that, energy needs escalate in parallel with the technological advancements around the world, and in order to meet the aforesaid energy needs, alternative energy resources, such as bio-fuel, have increasingly become preferred, and utilized. While the production of Biodiesel, which is known as eco-friendly fuel, is assessed herein agriculturally from the point of view of the use of suitable field plants, comments on the issue will be delivered herein as well.
Journal of Agronomy and Crop Science, 2008
The field crops, like all other cultivated plants, are very sensitive to the CC with its insepara... more The field crops, like all other cultivated plants, are very sensitive to the CC with its inseparable components as known greenhouse gases (GHGs') emissions which were composed of CO2, CH4, N2O, Water Vapor, CFCs, etc.. For instance, rice (Oryza sativa) crop plant takes the biggest share of 94% from the GHGs emissions as CH4. As a strong member of the Green House Gases (GHGs) emission, the CH4 has 300 times higher efficiency than the CO2 and 20 times strong in this respect than the water vapour (or H 2 O) in the atmosphere. As known, the most dangerous of GHGs is the CO2 for the all living organisms and nonliving things. The GHGs emission has positive-up to one degree-(the CO2 fertilization, etc.) and/or negative (acid rains, fog, floods, hail, etc.) impacts on flora. According to scientific research findings, the world's mean temperature (1.4-5.8 o C) will rise by the end of the year of 2100 and affect the many plants, ecologies, ecosystems and climatological parameters as locally or regionally or continentally. Particularly, climate change will increase of the field crops' growth and development stages, water use efficiency (WUE) balance(s), accelerates the ripening, reduces the yield (dry matter) and nutrient input/taken, etc. with another morphologic, phenologic, metabolic and biochemical traits.
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Papers by Prof.Dr. Hakan Ulukan