Abstract
The effects of cultural parameters such as carbon and nitrogen source and environmental factors including temperature and pH were investigated on spore and mycelial yield of Trichoderma viride, which has potential as a biocontrol agent against species of Fusarium in batch culture and fed-batch culture where there was limiting nutrient. The results obtained indicated that growth and sporulation of T. viride were greatly influenced by various carbon and nitrogen sources, and by environmental factors such as pH and temperature. Mannitol, wheat bran and rice bran as sole carbon sources appear to stimulate high mycelial growth and spore yield in fed-batch culture. Growth and sporulation were also favoured by NaNO3, peptone and NH4SO4 as the nitrogen sources in fed-batch and batch cultures. Maximum growth and sporulation was between pH 4.5 and 6.0. Temperatures between 30 and 37 °C were good for mycelium growth of T. viride while temperatures between 30 to 45 °C were good for sporulation. The amount of spore and mycelium produced and the time required for attainment of maximum spore yield increased with increasing carbon and nitrogen source in batch culture. The final spore yield obtained in fed-batch culture was two times higher than the apparent spore-carrying capacity of batch culture. These results show that T. viride is capable of growing and sporulating with varied nutritional and environmental conditions, and, therefore, this strain of T. viride may be useful as a biocontrol agent under diverse physiological and environmental conditions.
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Onilude, A.A., Adebayo-Tayo, B.C., Odeniyi, A.O. et al. Comparative mycelial and spore yield by Trichoderma viride in batch and fed-batch cultures. Ann Microbiol 63, 547–553 (2013). https://doi.org/10.1007/s13213-012-0502-z
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DOI: https://doi.org/10.1007/s13213-012-0502-z