Authors:
Dr. Adem Günes | Erciyes University | Turkey
PhD Nurgul Kıtır | Yeditepe University | Turkey
Prof. Metin Turan | Yeditepe University | Turkey
Prof. Fikrettin Sahin | Yeditepe University | Turkey
Prof. Medine Gulluce | Erzurum Atatürk Üniversity | Turkey
Prof.Dr. Güleray Ağar | Atatürk Üniversitesi | Turkey
Hatice Öğütçü | Kırşehir University | Turkey
EFFECTS OF PLANT GROWTH PROMOTING MICROORGANISMS ON WHEAT PLANT GROWTH AND AMINO ACID CONTENT
Metin Turan1, Fikrettin Şahin1 Nurgül Kıtır1 , Adem Güneş2 ,Medine Güllüce3, Güleray Ağar3,Hatice Öğütcü4
1 Department of Genetic and Bioengineering, Faculty of Engineering and Architecture, Yeditepe University, Istanbul, Turkey
2 Erciyes University, Faculty of Agriculture, Department of Soil Science, Kayseri, Turkey
3Atatürk University, Department of Biology,Erzurum,Turkey
4Ahi Evran University, Department of Biology, Kırşehir, Turkey
This study was conducted on aridisols, a soil ordo widely existing in Turkey’s Eastern Anatolia Region. A greenhouse trial on wheat was conducted in 45 pots with an experimental design of 9x5 factorial, including a control and 8 microorganisms (Bacillus megaterium M3, Bacillus subtilis OSU-142, Bacillus pumilus C26, Paenibacillus polymxa, Azospirillum brasilense Sp-245, Burkholderia cepacia BA-7, Burkholderia cepacia AMR-BA7, Raoutella terrigena). Plant and soil samples were taken at the end of the growth period (90 days). Macro- and micronutrients from soil samples and plant roots were determined along with amino acids, enzymes, ureas, dehydrogenase, acid, alkali phosphates, catalase (CAT), peroxidase (POD) and super oxide dismutase (SOD). The results showed that amino acids, plant and soil enzymes extracted from root parts significantly affect wheat plant growth. The highest wheat dry matter was obtained with the Bacillus subtilis OSU-142 PGPR application. However, application of PGPR decreased amino acids extracted from plant roots. The lowest extracted amino acid was obtained with the Paenibacillus polymxa PGPR. Positive correlations were determined between the PGPR and wheat plant nutrition/dry matter. On the contrary, extracted amino acids had negative correlations with the PGPR application. The plant enzymes such as catalase (CAT), peroxidase (POD) and super oxide dismutase (SOD) increased following the PGPR application and the highest values were obtained with the application of Paenibacillus polymxa PGPR.
Keywords: PGPR, Wheat, Plant enzymes.