ANTIFUNGAL ACTIVITY OF TWO STREPTOMYCES SPECIES ISOLATED FROM EGYPTIAN SOIL AGAINST SOME PHYTOPATHOGENIC FUNGI

Journal of microbiology, biotechnology and food sciences Pub Date : 2024-07-04 DOI:10.55251/jmbfs.10665

Amira A. El-Fallal, Mohamed Ismail Abou-Dobara, Ahmed KA El-Sayed, Enas Shaban, Mohamed M. A. Mousa

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Abstract

The objective of this study was to isolate and identify Streptomyces species with high antifungal activities against some phytopathogenic fungal strains. Fourteen different Streptomyces isolates were isolated from the soils of the Damietta Governorate, Egypt. The results indicated that two isolates (O5 and M7) showed potent antifungal actions against the tested fungal strains including Alternaria alternata, Macrophomina phaseolina, Fusarium oxysporum, Penicillium italicum, Rhizoctonia solani and Trichoderma harzianum. The strongest inhibition zones of the isolates O5 and M7 were obtained against A. alternata (3.5±0.04 cm and 3.63±0.02 cm, respectively) and M. phaseolina (3.23±0.03 cm and 3.43±0.01 cm, respectively). The two isolates were identified classically and using 16S rDNA sequencing as Streptomyces flavovirens (accession number: EGDA-O5 OM301640) and S. gougerotii (accession number: EGDA-M7 OM301639). The obtained results confirmed that S. flavovirens and S. gougerotii might be used as promising antifungal agents against various fungal strains.

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从埃及土壤中分离的两种链霉菌对某些植物病原真菌的抗真菌活性

本研究的目的是分离和鉴定对某些植物病原真菌菌株具有高抗真菌活性的链霉菌。研究人员从埃及达米埃塔省的土壤中分离出 14 种不同的链霉菌。结果表明，两个分离菌株（O5 和 M7）对所测试的真菌菌株具有很强的抗真菌作用，这些菌株包括交替交替孢霉（Alternaria alternata）、相思豆巨霉菌（Macrophomina phaseolina）、氧孢镰刀菌（Fusarium oxysporum）、意大利青霉（Penicillium italicum）、根瘤菌（Rhizoctonia solani）和毛霉菌（Trichoderma harzianum）。分离物 O5 和 M7 对互生菌（A. alternata）（分别为 3.5±0.04 厘米和 3.63±0.02 厘米）和相思豆菌（M. phaseolina）（分别为 3.23±0.03 厘米和 3.43±0.01 厘米）的抑制带最强。利用 16S rDNA 测序对这两个分离物进行了鉴定，分别为黄链霉菌（登录号：EGDA-O5 OM301640）和 S. gougerotii（登录号：EGDA-M7 OM301639）。所获得的结果证实，S. flavovirens 和 S. gougerotii 有可能被用作抗各种真菌菌株的抗真菌剂。

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Journal of microbiology, biotechnology and food sciences

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