Yavuz Demir - Academia.edu (original) (raw)
Papers by Yavuz Demir
Journal of Education Faculty, Jun 1, 2008
Since the subjects within the field of Natural Sciences are complex and abstract, the necessity o... more Since the subjects within the field of Natural Sciences are complex and abstract, the necessity of supporting education with concrete materials has been emerged. The effects of modeling on education which is one of the tools used for this purpose makes up the subject of this research. The aim of this study is to research effects of model-teaching of “Digestion and Scructures in Charge”,”Excretion and Scructures in Charge” and “Lets Recognize a Flowery Plant” Subjects on the Success of Students in the 5th Grade of Primary Education.
Trakya Eğitim Dergisi
Bu araştırmanın amacı Fen Lisesi ve Anadolu Liseleri’nde öğrenim gören 12. sınıf öğrencilerinin ç... more Bu araştırmanın amacı Fen Lisesi ve Anadolu Liseleri’nde öğrenim gören 12. sınıf öğrencilerinin çoktan seçmeli Biyoloji sorularını doğru yanıtlayanların kullandıkları bilişsel ve üstbilişsel stratejileri belirlemektir Araştırmada nitel araştırma yöntemlerinden biri olan durum çalışması kullanılmıştır. Araştırmanın çalışma grubunu 1 Fen Lisesi ve 6 Anadolu Lisesi’nden toplam 14 öğrenci oluşturmuştur. Her bir öğrencinin çoktan seçmeli soruları çözüm süreçlerine ait gözlem kayıtları ile yarı yapılandırılmış görüşmelerden elde edilen verilerin transkriptleri yapılmış ve analiz edilmiştir. Araştırma sonucunda soruları doğru yanıtlayan öğrencilerin soruları yanlış yanıtlayan öğrencilerden farklı olarak zihinde canlandırma, orantı kurma, kelimeleri kalemi ya da parmağıyla takip ederek okuma, kendine soru sorma gibi bilişsel stratejiler ile ipuçlarının altını çizme ya da yuvarlak içerisine alma, seçeneklere işaret koyma, tekrar okuma, önemli noktaları tekrarlama, soru metnindeki şekil, tabl...
Tarım Bilimleri Dergisi
Given the increasing importance of boron (B) toxicity, the present study investigates the roles o... more Given the increasing importance of boron (B) toxicity, the present study investigates the roles of glutathione (20 mM, GSH) and proline (20 mM) in the improvement of wheat (Triticum aestivum cv. Altındane) resistance to B toxicity (10 mM B). The plants were raised in hydroponic culture with control, B toxicity, B+glutathione, B+proline, glutathione and proline. B+glutathione and B+proline resisted the detrimental influences of B toxicity on the root and shoot lengths, the total chlorophyll, and phenolic contents. B toxicity increased superoxide radicals (O2.-), hydrogen peroxide (H2O2), lipid peroxidation (MDA), and proline contents while B+glutathione and B+proline applications diminished the mentioned parameters with the exception of the proline content. Individual B toxicity and combined B+glutathione and B+proline applications increased generally total ascorbic acid and glutathione levels in the wheat while the B+proline application decreased GSH content. The B toxicity decrease...
Acta Scientiarum Polonorum Hortorum Cultus, 2021
In this study; growth, chlorophyll, carotenoid, proline and MDA contents, the amounts of reactive... more In this study; growth, chlorophyll, carotenoid, proline and MDA contents, the amounts of reactive oxygen species (ROS) (superoxide (O2.-) and hydrogen peroxide (H2O2)), and antioxidants (superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), ascorbate peroxidase (APX), glutathione reductase (GR) activities and its isoenzyme profiles, (ascorbate (AsA), dehydro ascorbate (DHA) and glutathione (GSH)) quantities in maize plants ((Zea mays L. cv. Hido) exposed to boron toxicity (B) (8 mM B(OH)3) and B+chitosan (0.01%, foliar (A) and seed soaking (B) applications) conditions in hydroponic culture have been studied comparatively. Boron toxicity significantly reduced growth parameters, chlorophyll, carotenoid, AsA, DHA and CAT activity while increased proline, MDA, oxidants (O2.- and H2O2), SOD, POD, APX and GR activities and GSH levels. B+Chitosan A and B applications significantly reversed the B toxicity-based inhibition in these parameters. It has been suggested that chitosan can...
Journal of Education Faculty, 2004
In this study, changes in enzymatic browning, soluble protein and vitamin C contents in potato tu... more In this study, changes in enzymatic browning, soluble protein and vitamin C contents in potato tubers (Agria, Famosa, Isola ve Granula varieties) during dor- mancy period were investigated. It was found that enzymatic browning was the highest in Agria, the lowest in Isola; soluble protein content was the lowest in Agria and Granula, the highest in Isola; Vitamin C content was the lowest in Agria, the highest in Famosa. As a result of this, Isola and Famosa were observed to be the most convenient cultivars in terms of tuber quality.
Journal of Environmental Protection and Ecology, 2013
Bu calismada, patates yumrularinda (Agria, Famosa, Isola ve Granula) dor-mansi periyodunca enzima... more Bu calismada, patates yumrularinda (Agria, Famosa, Isola ve Granula) dor-mansi periyodunca enzimatik esmerlesme, cozunebilir protein ve C vitamini mik-tarlarindaki degismeler incelenmistir. Enzimatik esmerlesme, en dusuk Isolada en yuksek Agria’da; protein miktari, en dusuk Agria ve Granula’da en yuksek Iso-la’da; Vitamin C miktari ise en dusuk Agria’da en yuksek Famosa’da bulunmustur. Bu sonuclara gore, incelenen patates cesitleri arasinda Isola ve Famosa yumru kali-tesi acisindan en uygun cesitler olarak belirlenmistir.
Bu calismanin amaci, biyoloji ogretmen adaylarinin cevre bilinci ve cevresel duyarliligina yoneli... more Bu calismanin amaci, biyoloji ogretmen adaylarinin cevre bilinci ve cevresel duyarliligina yonelik goruslerini belirlemeye iliskin bir olcek gelistirmektir. Bu amacla oncelikle ilgili literatur yardimiyla toplam 93 adet olcek maddesi hazirlanmistir. Bu maddelerden 91 tanesi 5’li Likert tipi derecelendirme olcegi seklinde olup, 2 tanesi demografik degiskenlerden olusmaktadir. Olcek, Ataturk Universitesi Kazim Karabekir Egitim Fakultesi Biyoloji Egitimi anabilim dalinda ogrenim goren toplam 188 ogretmen adayina uygulanmistir. Elde edilen verilerin analizi SPSS 17.0 istatistik paket programi yardimiyla yapilmistir. Olcegin madde analizi calismalarinda madde-toplam korelasyonlarina bakilirken, guvenirlik calismalarinda Cronbach Alpha ic tutarlik katsayisi dikkate alinmistir. Ayrica, olcegin yapi gecerligini belirlemek amaciyla faktor analizi yapilmistir. Buna gore yapilan faktor analizi sonucunda 2 faktor elde edilirken, olcegin genelinden elde edilen Cronbach Alpha ic tutarlik katsayis...
The aim of this study is to develop a scale determining biology teacher candidate's opinions ... more The aim of this study is to develop a scale determining biology teacher candidate's opinions towards environmental awareness and environmental sensitivity. For this aim, at first, totally 93 scale items were prepared by reviewing relevant literature. 91 items in this scale were a five-point Likert type scale and 2 of 93 items consisted of demographic variables. The scale was applied to total of 188 biology teacher candidates from Education Faculties of Ataturk University. SPSS 17.0 Statistical Program was used to analyze the data. Item analysis studies were done though item-total correlation and reliability analyses were counted through Cronbach Alpha internal consistency coefficient. The construct validity of the scale was verified by factor analysis. Based on this factor analysis, two factors were identified and Cronbach Alpha internal consistency coefficient for whole test was found to be 0.921. Keywords: biology teacher candidate, environmental awareness, environmental sens...
Alınteri Zirai Bilimler Dergisi, 2019
The aim of this study was to determine cross-stress tolerance in plants have different seed nutri... more The aim of this study was to determine cross-stress tolerance in plants have different seed nutrient content (maize, bean and wheat). For this purpose, salt (50 and 100 mM NaCI) and cold stress (12/7oC) separately or in combinations (cross stress) were applied and studied the alterations of root and stem growth, total soluble protein content and antioxidant enzyme activities (superoxide dismutase (SOD), catalase (CAT), peroxidase (POD) and ascorbate peroxidase (APX)) associated with induction of cold hardiness by salt stress. Salt and cold stress and its combinations caused inhibition of root and stem growth and antioxidant enzyme activities (SOD, CAT, POD and APX) were significantly increased or decreased due to both salt, cold stress and its combinations. The soluble protein content increased in maize and wheat while decreased in bean in all applications. Cross-stress, on the other hand, decreased the soluble protein content according to alone salt or cold stress in all plants. As...
![Research paper thumbnail of Erratum to “Modulation of alternative oxidase to enhance tolerance against cold stress of chickpea by chemical treatments” [J. Plant Physiol. 175 (2015) 95–101]](https://attachments.academia-assets.com/103533840/thumbnails/1.jpg)
](Journal of Plant Physiology, 2015
Erratum Erratum to "Modulation of alternative oxidase to enhance tolerance against cold stress of... more Erratum Erratum to "Modulation of alternative oxidase to enhance tolerance against cold stress of chickpea by chemical treatments" [J. Plant Physiol. 175 (2015) 95-101]
Romanian Biotechnological Letters
The effects of long-term salt stress on the contents of chlorophyll, proline, protein, hydrogen p... more The effects of long-term salt stress on the contents of chlorophyll, proline, protein, hydrogen peroxide (H 2O 2), and malondialdehyde (MDA) in terms of lipid peroxidation, and on the changes in activities of antioxidant enzymes such as superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX) and peroxidase (POD) in leaves of pea (Pisum sativum cv Rona) were investigated in field conditions. Salinity and irrigation water regime experiments were set up in pots as randomized plot experimental designs with five replications. The experiment focused on pea responses to irrigation water salinity by irrigating the crops using 6 different levels of saline water (0.7, 2.0, 3.0, 4.0, 5.0 and 7.0 dS m -1) with a constant leaching fraction (LF = 0.30). The pots were located in the experimental area under a polyethylene cover which was about 1.8 m height from the surface for the purpose of eliminating rainfall effect on the experiments. Chlorophyll and protein contents were signifi...
The Clearing House: A Journal of Educational Strategies, Issues and Ideas, 2012
ABSTRACT Taylor & Francis makes every effort to ensure the accuracy of all the inform... more ABSTRACT Taylor & Francis makes every effort to ensure the accuracy of all the information (the "Content") contained in the publications on our platform. However, Taylor & Francis, our agents, and our licensors make no representations or warranties whatsoever as to the accuracy, completeness, or suitability for any purpose of the Content. Any opinions and views expressed in this publication are the opinions and views of the authors, and are not the views of or endorsed by Taylor & Francis. The accuracy of the Content should not be relied upon and should be independently verified with primary sources of information. Taylor and Francis shall not be liable for any losses, actions, claims, proceedings, demands, costs, expenses, damages, and other liabilities whatsoever or howsoever caused arising directly or indirectly in connection with, in relation to or arising out of the use of the Content.
Journal of Plant Physiology, 2015
Zeitschrift für Naturforschung C, 2010
Na+, Cl-, K+, Ca2+, and proline contents, the rate of lipid peroxidation level in terms of malond... more Na+, Cl-, K+, Ca2+, and proline contents, the rate of lipid peroxidation level in terms of malondialdehyde (MDA) and chlorophyll content, and the changes in the activity of antioxidant enzymes, such as superoxide dismutase (SOD: EC 1.15.1.1), catalase (CAT: EC 1.11.1.6), ascorbate peroxidase (APX: EC 1.11.1.11), and glutathione reductase (GR: EC 1.6.4.2), in tissues of five tomato cultivars in salt tolerance were investigated in a callus culture. The selection of effective parameters used in these tomato genotypes and to find out the use of "in vitro" tests in place of "in vivo" salt tolerance tests were investigated. As a material, five different tomato genotypes during a 10-day time period were used, and 150 mM NaCl was applied at callus plant tissue. The exposure to NaCl induced a significant increase in MDA content in both salt-resistant and salt-sensitive cultivars. But the MDA content was higher in salt-sensitive cultivars. The chlorophyll content was more ...
Adiyaman University Journal of Social Sciences, 2013
Bu calismada lise ogrencilerinin difuzyon ve osmoz konulariyla ilgili alternatif kavramlarinin be... more Bu calismada lise ogrencilerinin difuzyon ve osmoz konulariyla ilgili alternatif kavramlarinin belirlenmesine yonelik bir teshis testinin gelistirilme ve uygulanma sureci betimlenmistir. Test gelistirme sureci uc temel adimdan olusmaktadir: Bu adimlar; testteki konu alanlarinin belirlenmesi, ogrencilerin alternatif kavramlarinin belirlenmesi ve testin gelistirilmesidir. Alternatif kavramlar, literature ek olarak, acik uclu sorular iceren coktan secmeli bir test ile belirlenmistir. Testin bu ilk taslagi uc farkli liseden toplam 119 dokuzuncu sinif ogrencisine uygulanmistir. Bu uygulamadan ve literaturden elde edilen veriler, test maddelerinin ikinci asamalarinin gelistirilmesinde kullanilmistir. Boylelikle son halini alan test 9. siniftan 90 ve 10. siniftan 73 olmak uzere toplam 163 Anadolu Lisesi ogrencisine uygulanmistir. Testin guvenirlik katsayisi 0.62, ortalama zorluk indeksi 0.55 ve ortalama ayiricilik gucu 0.41 olarak hesaplanmistir. Testin uygulamasindan elde edilen sonuclara gore ise lise ogrencilerinin difuzyon ve osmoz kavramlariyla ilgili cok sayida alternatif kavramlarinin oldugu belirlenmistir.
Plant Growth Regulation - PLANT GROWTH REGUL, 2003
The effects of putrescine and ethephon on peroxidase (POD; EC 1.11.1.7), polyphenol oxidase (PPO;... more The effects of putrescine and ethephon on peroxidase (POD; EC 1.11.1.7), polyphenol oxidase (PPO; EC 1.14.18.1), catalase (CAT; EC 1.11.1.6) activities and proline content in spinach leaves under saline stress were investigated. In control conditions, putrescine increased PPO and CAT activities and proline content, but decreased POD activity. Ethephon increased these three enzyme activities but did not affect proline content. In saline conditions, putrescine increased POD and CAT activities and proline content, while it decreased PPO activity. Ethephon increased both PPO and CAT activities and proline content, but decreased POD activity. Putrescine and ethephon have opposite effects on the enzyme activities and proline accumulation because they acts as antagonists.
Plant Growth Regulation, 2002
Accumulation of proline in response to environmental stresses seems tobe widespread among plants.... more Accumulation of proline in response to environmental stresses seems tobe widespread among plants. To elucidate the role of proline in plantresponses,in vivo and in vitro, we studied theeffect of proline on catalase (CAT; EC 1.11.1.6), peroxidase (POD; EC 1.11.1.7)and polyphenol oxidase (PPO; EC 1.14.18.1). In vivo, thesethree enzymes were activated by proline, while CAT and POD were activated andPPO was
Food Chemistry, 2012
Recent advances in our understanding of the pathogenesis of alcohol-induced hepato-renal injury a... more Recent advances in our understanding of the pathogenesis of alcohol-induced hepato-renal injury and the development of new approaches to its treatment have been reported in various works. This study involves alcohol-induced oxidative stress linked to the metabolism of ethanol involving both mitochondrial and peroxisomal fractions of liver and kidney. Alcohol treatment resulted in the depletion of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), glutathione reductase (GR), Glutathione-S-Transferase (GST) activities, and reduced glutathione (GSH) content, higher level of malondialdehyde (MDA) and lower levels of protein carbonyls (PC) causing malfunction of hepatic and renal tissues, when compared to control rats. Thespesia populnea (TP) leaf extracts, administered to chronic alcohol ingested rats, were envisaged to possess significant antioxidant defence properties and help in the recovery of tissues from alcohol-induced oxidative damage. The results showed that degenerative changes in hepatic and renal cells of alcoholic groups were minimized by the administration of TP leaf extracts as also revealed by histopathological examination. The current findings indicate that treatment with TP extracts reduces alcohol-induced oxidative stress, thereby protecting the hepatic and renal tissue from alcohol-induced damage.
Journal of Education Faculty, Jun 1, 2008
Since the subjects within the field of Natural Sciences are complex and abstract, the necessity o... more Since the subjects within the field of Natural Sciences are complex and abstract, the necessity of supporting education with concrete materials has been emerged. The effects of modeling on education which is one of the tools used for this purpose makes up the subject of this research. The aim of this study is to research effects of model-teaching of “Digestion and Scructures in Charge”,”Excretion and Scructures in Charge” and “Lets Recognize a Flowery Plant” Subjects on the Success of Students in the 5th Grade of Primary Education.
Trakya Eğitim Dergisi
Bu araştırmanın amacı Fen Lisesi ve Anadolu Liseleri’nde öğrenim gören 12. sınıf öğrencilerinin ç... more Bu araştırmanın amacı Fen Lisesi ve Anadolu Liseleri’nde öğrenim gören 12. sınıf öğrencilerinin çoktan seçmeli Biyoloji sorularını doğru yanıtlayanların kullandıkları bilişsel ve üstbilişsel stratejileri belirlemektir Araştırmada nitel araştırma yöntemlerinden biri olan durum çalışması kullanılmıştır. Araştırmanın çalışma grubunu 1 Fen Lisesi ve 6 Anadolu Lisesi’nden toplam 14 öğrenci oluşturmuştur. Her bir öğrencinin çoktan seçmeli soruları çözüm süreçlerine ait gözlem kayıtları ile yarı yapılandırılmış görüşmelerden elde edilen verilerin transkriptleri yapılmış ve analiz edilmiştir. Araştırma sonucunda soruları doğru yanıtlayan öğrencilerin soruları yanlış yanıtlayan öğrencilerden farklı olarak zihinde canlandırma, orantı kurma, kelimeleri kalemi ya da parmağıyla takip ederek okuma, kendine soru sorma gibi bilişsel stratejiler ile ipuçlarının altını çizme ya da yuvarlak içerisine alma, seçeneklere işaret koyma, tekrar okuma, önemli noktaları tekrarlama, soru metnindeki şekil, tabl...
Tarım Bilimleri Dergisi
Given the increasing importance of boron (B) toxicity, the present study investigates the roles o... more Given the increasing importance of boron (B) toxicity, the present study investigates the roles of glutathione (20 mM, GSH) and proline (20 mM) in the improvement of wheat (Triticum aestivum cv. Altındane) resistance to B toxicity (10 mM B). The plants were raised in hydroponic culture with control, B toxicity, B+glutathione, B+proline, glutathione and proline. B+glutathione and B+proline resisted the detrimental influences of B toxicity on the root and shoot lengths, the total chlorophyll, and phenolic contents. B toxicity increased superoxide radicals (O2.-), hydrogen peroxide (H2O2), lipid peroxidation (MDA), and proline contents while B+glutathione and B+proline applications diminished the mentioned parameters with the exception of the proline content. Individual B toxicity and combined B+glutathione and B+proline applications increased generally total ascorbic acid and glutathione levels in the wheat while the B+proline application decreased GSH content. The B toxicity decrease...
Acta Scientiarum Polonorum Hortorum Cultus, 2021
In this study; growth, chlorophyll, carotenoid, proline and MDA contents, the amounts of reactive... more In this study; growth, chlorophyll, carotenoid, proline and MDA contents, the amounts of reactive oxygen species (ROS) (superoxide (O2.-) and hydrogen peroxide (H2O2)), and antioxidants (superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), ascorbate peroxidase (APX), glutathione reductase (GR) activities and its isoenzyme profiles, (ascorbate (AsA), dehydro ascorbate (DHA) and glutathione (GSH)) quantities in maize plants ((Zea mays L. cv. Hido) exposed to boron toxicity (B) (8 mM B(OH)3) and B+chitosan (0.01%, foliar (A) and seed soaking (B) applications) conditions in hydroponic culture have been studied comparatively. Boron toxicity significantly reduced growth parameters, chlorophyll, carotenoid, AsA, DHA and CAT activity while increased proline, MDA, oxidants (O2.- and H2O2), SOD, POD, APX and GR activities and GSH levels. B+Chitosan A and B applications significantly reversed the B toxicity-based inhibition in these parameters. It has been suggested that chitosan can...
Journal of Education Faculty, 2004
In this study, changes in enzymatic browning, soluble protein and vitamin C contents in potato tu... more In this study, changes in enzymatic browning, soluble protein and vitamin C contents in potato tubers (Agria, Famosa, Isola ve Granula varieties) during dor- mancy period were investigated. It was found that enzymatic browning was the highest in Agria, the lowest in Isola; soluble protein content was the lowest in Agria and Granula, the highest in Isola; Vitamin C content was the lowest in Agria, the highest in Famosa. As a result of this, Isola and Famosa were observed to be the most convenient cultivars in terms of tuber quality.
Journal of Environmental Protection and Ecology, 2013
Bu calismada, patates yumrularinda (Agria, Famosa, Isola ve Granula) dor-mansi periyodunca enzima... more Bu calismada, patates yumrularinda (Agria, Famosa, Isola ve Granula) dor-mansi periyodunca enzimatik esmerlesme, cozunebilir protein ve C vitamini mik-tarlarindaki degismeler incelenmistir. Enzimatik esmerlesme, en dusuk Isolada en yuksek Agria’da; protein miktari, en dusuk Agria ve Granula’da en yuksek Iso-la’da; Vitamin C miktari ise en dusuk Agria’da en yuksek Famosa’da bulunmustur. Bu sonuclara gore, incelenen patates cesitleri arasinda Isola ve Famosa yumru kali-tesi acisindan en uygun cesitler olarak belirlenmistir.
Bu calismanin amaci, biyoloji ogretmen adaylarinin cevre bilinci ve cevresel duyarliligina yoneli... more Bu calismanin amaci, biyoloji ogretmen adaylarinin cevre bilinci ve cevresel duyarliligina yonelik goruslerini belirlemeye iliskin bir olcek gelistirmektir. Bu amacla oncelikle ilgili literatur yardimiyla toplam 93 adet olcek maddesi hazirlanmistir. Bu maddelerden 91 tanesi 5’li Likert tipi derecelendirme olcegi seklinde olup, 2 tanesi demografik degiskenlerden olusmaktadir. Olcek, Ataturk Universitesi Kazim Karabekir Egitim Fakultesi Biyoloji Egitimi anabilim dalinda ogrenim goren toplam 188 ogretmen adayina uygulanmistir. Elde edilen verilerin analizi SPSS 17.0 istatistik paket programi yardimiyla yapilmistir. Olcegin madde analizi calismalarinda madde-toplam korelasyonlarina bakilirken, guvenirlik calismalarinda Cronbach Alpha ic tutarlik katsayisi dikkate alinmistir. Ayrica, olcegin yapi gecerligini belirlemek amaciyla faktor analizi yapilmistir. Buna gore yapilan faktor analizi sonucunda 2 faktor elde edilirken, olcegin genelinden elde edilen Cronbach Alpha ic tutarlik katsayis...
The aim of this study is to develop a scale determining biology teacher candidate's opinions ... more The aim of this study is to develop a scale determining biology teacher candidate's opinions towards environmental awareness and environmental sensitivity. For this aim, at first, totally 93 scale items were prepared by reviewing relevant literature. 91 items in this scale were a five-point Likert type scale and 2 of 93 items consisted of demographic variables. The scale was applied to total of 188 biology teacher candidates from Education Faculties of Ataturk University. SPSS 17.0 Statistical Program was used to analyze the data. Item analysis studies were done though item-total correlation and reliability analyses were counted through Cronbach Alpha internal consistency coefficient. The construct validity of the scale was verified by factor analysis. Based on this factor analysis, two factors were identified and Cronbach Alpha internal consistency coefficient for whole test was found to be 0.921. Keywords: biology teacher candidate, environmental awareness, environmental sens...
Alınteri Zirai Bilimler Dergisi, 2019
The aim of this study was to determine cross-stress tolerance in plants have different seed nutri... more The aim of this study was to determine cross-stress tolerance in plants have different seed nutrient content (maize, bean and wheat). For this purpose, salt (50 and 100 mM NaCI) and cold stress (12/7oC) separately or in combinations (cross stress) were applied and studied the alterations of root and stem growth, total soluble protein content and antioxidant enzyme activities (superoxide dismutase (SOD), catalase (CAT), peroxidase (POD) and ascorbate peroxidase (APX)) associated with induction of cold hardiness by salt stress. Salt and cold stress and its combinations caused inhibition of root and stem growth and antioxidant enzyme activities (SOD, CAT, POD and APX) were significantly increased or decreased due to both salt, cold stress and its combinations. The soluble protein content increased in maize and wheat while decreased in bean in all applications. Cross-stress, on the other hand, decreased the soluble protein content according to alone salt or cold stress in all plants. As...
Journal of Plant Physiology, 2015
Erratum Erratum to "Modulation of alternative oxidase to enhance tolerance against cold stress of... more Erratum Erratum to "Modulation of alternative oxidase to enhance tolerance against cold stress of chickpea by chemical treatments" [J. Plant Physiol. 175 (2015) 95-101]
Romanian Biotechnological Letters
The effects of long-term salt stress on the contents of chlorophyll, proline, protein, hydrogen p... more The effects of long-term salt stress on the contents of chlorophyll, proline, protein, hydrogen peroxide (H 2O 2), and malondialdehyde (MDA) in terms of lipid peroxidation, and on the changes in activities of antioxidant enzymes such as superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX) and peroxidase (POD) in leaves of pea (Pisum sativum cv Rona) were investigated in field conditions. Salinity and irrigation water regime experiments were set up in pots as randomized plot experimental designs with five replications. The experiment focused on pea responses to irrigation water salinity by irrigating the crops using 6 different levels of saline water (0.7, 2.0, 3.0, 4.0, 5.0 and 7.0 dS m -1) with a constant leaching fraction (LF = 0.30). The pots were located in the experimental area under a polyethylene cover which was about 1.8 m height from the surface for the purpose of eliminating rainfall effect on the experiments. Chlorophyll and protein contents were signifi...
The Clearing House: A Journal of Educational Strategies, Issues and Ideas, 2012
ABSTRACT Taylor & Francis makes every effort to ensure the accuracy of all the inform... more ABSTRACT Taylor & Francis makes every effort to ensure the accuracy of all the information (the "Content") contained in the publications on our platform. However, Taylor & Francis, our agents, and our licensors make no representations or warranties whatsoever as to the accuracy, completeness, or suitability for any purpose of the Content. Any opinions and views expressed in this publication are the opinions and views of the authors, and are not the views of or endorsed by Taylor & Francis. The accuracy of the Content should not be relied upon and should be independently verified with primary sources of information. Taylor and Francis shall not be liable for any losses, actions, claims, proceedings, demands, costs, expenses, damages, and other liabilities whatsoever or howsoever caused arising directly or indirectly in connection with, in relation to or arising out of the use of the Content.
Journal of Plant Physiology, 2015
Zeitschrift für Naturforschung C, 2010
Na+, Cl-, K+, Ca2+, and proline contents, the rate of lipid peroxidation level in terms of malond... more Na+, Cl-, K+, Ca2+, and proline contents, the rate of lipid peroxidation level in terms of malondialdehyde (MDA) and chlorophyll content, and the changes in the activity of antioxidant enzymes, such as superoxide dismutase (SOD: EC 1.15.1.1), catalase (CAT: EC 1.11.1.6), ascorbate peroxidase (APX: EC 1.11.1.11), and glutathione reductase (GR: EC 1.6.4.2), in tissues of five tomato cultivars in salt tolerance were investigated in a callus culture. The selection of effective parameters used in these tomato genotypes and to find out the use of "in vitro" tests in place of "in vivo" salt tolerance tests were investigated. As a material, five different tomato genotypes during a 10-day time period were used, and 150 mM NaCl was applied at callus plant tissue. The exposure to NaCl induced a significant increase in MDA content in both salt-resistant and salt-sensitive cultivars. But the MDA content was higher in salt-sensitive cultivars. The chlorophyll content was more ...
Adiyaman University Journal of Social Sciences, 2013
Bu calismada lise ogrencilerinin difuzyon ve osmoz konulariyla ilgili alternatif kavramlarinin be... more Bu calismada lise ogrencilerinin difuzyon ve osmoz konulariyla ilgili alternatif kavramlarinin belirlenmesine yonelik bir teshis testinin gelistirilme ve uygulanma sureci betimlenmistir. Test gelistirme sureci uc temel adimdan olusmaktadir: Bu adimlar; testteki konu alanlarinin belirlenmesi, ogrencilerin alternatif kavramlarinin belirlenmesi ve testin gelistirilmesidir. Alternatif kavramlar, literature ek olarak, acik uclu sorular iceren coktan secmeli bir test ile belirlenmistir. Testin bu ilk taslagi uc farkli liseden toplam 119 dokuzuncu sinif ogrencisine uygulanmistir. Bu uygulamadan ve literaturden elde edilen veriler, test maddelerinin ikinci asamalarinin gelistirilmesinde kullanilmistir. Boylelikle son halini alan test 9. siniftan 90 ve 10. siniftan 73 olmak uzere toplam 163 Anadolu Lisesi ogrencisine uygulanmistir. Testin guvenirlik katsayisi 0.62, ortalama zorluk indeksi 0.55 ve ortalama ayiricilik gucu 0.41 olarak hesaplanmistir. Testin uygulamasindan elde edilen sonuclara gore ise lise ogrencilerinin difuzyon ve osmoz kavramlariyla ilgili cok sayida alternatif kavramlarinin oldugu belirlenmistir.
Plant Growth Regulation - PLANT GROWTH REGUL, 2003
The effects of putrescine and ethephon on peroxidase (POD; EC 1.11.1.7), polyphenol oxidase (PPO;... more The effects of putrescine and ethephon on peroxidase (POD; EC 1.11.1.7), polyphenol oxidase (PPO; EC 1.14.18.1), catalase (CAT; EC 1.11.1.6) activities and proline content in spinach leaves under saline stress were investigated. In control conditions, putrescine increased PPO and CAT activities and proline content, but decreased POD activity. Ethephon increased these three enzyme activities but did not affect proline content. In saline conditions, putrescine increased POD and CAT activities and proline content, while it decreased PPO activity. Ethephon increased both PPO and CAT activities and proline content, but decreased POD activity. Putrescine and ethephon have opposite effects on the enzyme activities and proline accumulation because they acts as antagonists.
Plant Growth Regulation, 2002
Accumulation of proline in response to environmental stresses seems tobe widespread among plants.... more Accumulation of proline in response to environmental stresses seems tobe widespread among plants. To elucidate the role of proline in plantresponses,in vivo and in vitro, we studied theeffect of proline on catalase (CAT; EC 1.11.1.6), peroxidase (POD; EC 1.11.1.7)and polyphenol oxidase (PPO; EC 1.14.18.1). In vivo, thesethree enzymes were activated by proline, while CAT and POD were activated andPPO was
Food Chemistry, 2012
Recent advances in our understanding of the pathogenesis of alcohol-induced hepato-renal injury a... more Recent advances in our understanding of the pathogenesis of alcohol-induced hepato-renal injury and the development of new approaches to its treatment have been reported in various works. This study involves alcohol-induced oxidative stress linked to the metabolism of ethanol involving both mitochondrial and peroxisomal fractions of liver and kidney. Alcohol treatment resulted in the depletion of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), glutathione reductase (GR), Glutathione-S-Transferase (GST) activities, and reduced glutathione (GSH) content, higher level of malondialdehyde (MDA) and lower levels of protein carbonyls (PC) causing malfunction of hepatic and renal tissues, when compared to control rats. Thespesia populnea (TP) leaf extracts, administered to chronic alcohol ingested rats, were envisaged to possess significant antioxidant defence properties and help in the recovery of tissues from alcohol-induced oxidative damage. The results showed that degenerative changes in hepatic and renal cells of alcoholic groups were minimized by the administration of TP leaf extracts as also revealed by histopathological examination. The current findings indicate that treatment with TP extracts reduces alcohol-induced oxidative stress, thereby protecting the hepatic and renal tissue from alcohol-induced damage.