Effect of Some Plant Growth Promoting Bacteria on Yield, Yield Components of Dry Bean (Phaseolus vulgaris L. cv. Aras 98)

ABSTRACT : The common bean ( Phaseolus vulgaris L.) belongs to the family Leguminosae, and is a diverse food resource of high nutritional value. Plant growth promoting bacteria (PGPB) are a group of bacteria that actively colonize plants, increase plant growth and yield, and suppres plant disease. In this study, the effectiveness of ten PGPBs ( Alcaligenes piechaudii strain RK-136, Bacillus megaterium strain M-3, Bacillus pumilus strain M-13, Bacillus subtilis strain BA-142, Erwinia rhapontici strain RK-135, Burkholderia cepacia strain RK-277, Pantoea agglomerans strain RK-84, RK-123, RK-92, Pseudomonas putida strain BA-8, Serratia liquefaciens strain RK-102) was evaluated on growth and yield parameters of dry bean. Also, they were investigated for their ability to suppress diseases caused by natural plant pathogenic bacteria and/or fungal infections in field conditions. As a result of all experiments, some of the applications of PGPBs increased growth and yield parameters of dry bean. In addition, some of the PGPBs suppressed the diseases of bean caused by natural bacterial and/or fungal infections. Consequently, our results indicated that some of tested bacteria including Bacillus megaterium strain M-3, Erwinia rhapontici strain RK-135 and Pantoea agglomerans strain RK-92 can be used as biofertilizer for bean production in sustainable and ecological agricultural systems. Keywords: Bacteria, Phaseolus vulgaris, plant growth promoting bacteria, PGPBs, yield, yield component Bitki Buyumesini Tesvik Eden Bazi Bakterilerin Kuru Fasulyenin ( Phaseolus vulgaris L. cv. Aras 98) Verim ve Verim Unsurlarina Etkisi OZET : Leguminosae familyasina ait olan kuru fasulye ( Phaseolus vulgaris L.) bitkisi besin degeri yuksek bir gida kaynagidir. Bitki buyumesini tesvik eden bakteriler (PGPBs) aktif olarak bitkilerde kolonize olan ve bitki buyumesini ve verimini artiran ve hastaliklari baskilayan bir bakteri grubudur. Bu calismada on adet PGPB’nin ( Alcaligenes piechaudii strain RK-136, Bacillus megaterium strain M-3, Bacillus pumilus strain M-13, Bacillus subtilis strain BA-142, Erwinia rhapontici strain RK-135, Burkholderia cepacia strain RK-277, Pantoea agglomerans strain RK-84, RK-123, RK-92, Pseudomonas putida strain BA-8, Serratia liquefaciens strain RK-102) kuru fasulyenin buyumesi ve verimi uzerine etkililigi degerlendirilmistir. Ayrica bakteryel ve fungal bitki patojenlerinin arazi kosullarindaki dogal enfeksiyonlarindan kaynaklanan hastaliklarin onlenmesinde de PGPR bakterilerinin etkinlikleri arastirilmistir. Calismanin sonunda uygulanan bazi PGPB’lerin fasulyede buyumeyi ve verimi arttirdigi tespit edilmistir. Ek olarak, bu PGPB’lerin bazilari bakteriyel ya da fungal patojen enfeksiyonlarindan kaynaklanan hastaliklari baskilamislardir. Sonuc olarak, Bacillus megaterium strain M-3, Erwinia rhapontici strain RK-135 ve Pantoea agglomerans strain RK-92’in de dahil oldugu test edilen bazi bakterilerin surdurulebilir ve ekolojik tarim sistemlerinde kuru fasulye uretiminde biyogubre olarak kullanilabilir. Anahtar Kelimeler: Bakteri, Phaseolus vulgaris, bitki buyumesini tesvik eden bakteriler, PGPB, verim, verim unsurlari