Indole-3-Acetic Acid and Gibberellic Acid Production in Aspergillus Niger
Turk J Biol 34 (2010) 313-318 © TÜBİTAK doi:10.3906/biy-0812-15 Indole-3-acetic acid and gibberellic acid production in Aspergillus niger Işıl SEYİS BİLKAY1,*, Şafak KARAKOÇ2, Nilüfer AKSÖZ1 1Hacettepe University, Faculty of Science, Department of Biology (Biotechnology), 06532 Beytepe, Ankara - TURKEY 2MARA, National Food Reference Laboratory, Department of Biotechnology and GMO, Yenimahalle, 06171, Ankara - TURKEY Received: 19.12.2008 Abstract: The effects of incubation time, temperature, pH, and agitation on indole-3- acetic acid and gibberellic acid production in Aspergillus niger were studied. For indole-3-acetic acid production, 6 days of incubation at 25 °C and pH 6.0 was found to be optimum. Optimum conditions for gibberellic acid production were 12 days of incubation at 30 °C and pH 5.0. Agitation increased both indole-3-acetic acid and gibberellic acid production. Key words: Aspergillus niger, gibberellic acid, indole-3-acetic acid, phytohormone, plant growth regulator Aspergillus niger’den indol asetik asit ve gibberellik asit üretimi Özet: İnkübasyon süresi, sıcaklık, pH ve çalkalamanın, Aspergillus niger’den indol-3-asetik asit ve gibberellik asit üretimine etkisi araştırıldı. İndol asetik asit üretimi için 6 gün inkübasyon süresi, 25 °C sıcaklık ve pH 6,0 uygunken, gibberellik asit üretimi için 30 °C, pH 5,0 ve 12 gün inkübasyon süresinin uygun olduğu saptandı. Çalkalamanın ise hem indol-3-asetik asit hem de gibberellik asit üretimini arttırdığı gözlendi. Anahtar sözcükler: Aspergillus niger, gibberellik asit, indol-3-asetik asit, bitki hormonu, bitki büyüme düzenleyicisi Introduction Gibberellic acid is synthesized by Gibberella Gibberellic acid is a plant growth regulator of fujikuroi, Sphaceloma manihoticola, Neurospora economic and industrial importance (1).
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