Isolation and Characterization of Heterotrophic Bacteria from Blue-Green Algae with Multiple Plant Growth Promoting Traits | ||
| Egyptian Journal of Chemistry | ||
| Volume 66, Issue 8, August 2023, Pages 209-218 PDF (999.21 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejchem.2022.168789.7090 | ||
| Authors | ||
| Doaa Ibrahim1; Afaf H. Ali2; Mehrshan El Mokadem2; Eman Nour* 1 | ||
| 1Organic Crop Production Department, Faculty of Organic Agriculture, Heliopolis University for Sustainable Development, Cairo, Egypt | ||
| 2Botany Department, Women's College, Ain Shams University, Cairo, Egypt | ||
| Abstract | ||
| Blue-green algae (BGA) are unique photosynthetic prokaryotes which are associated with heterotrophic bacteria. BGA together with the associated heterotrophic bacteria (AHB) play a distinct role in soil and plant development. Despite the high diversity of the BGA-AHB, little is known about their potential ecological role. Thus, the present study aimed to obtain and identify BGA and their cultivable AHB. Two nitrogen-fixing BGA were isolated from desert soil and identified as Anabaenopsis circularis strain AnHu and Nostoc sp. strain NoHu. Based on the colony morphology, 51 and 12 BGA-AHB isolates were obtained from AnHu and NoHu, respectively, and screened for plant growth-promoting activities (PGPAs). Ten promising BGA-AHB isolates that displayed multifunctional ability were further identified. The analysis revealed that the 6 and 4 identified AnHu- and NoHu-AHB isolates, were affiliated to 4 and 2 different phyla, respectively, indicating high diversity of cultivable BGA-AHB. Moreover, the analysis revealed sequence identity for some BGA-AHB with a newly described strain, such as Pseudomonas songnenensis. The identified BGA-AHB isolates showed identical sequences with NCBI strains known for their functionality as plant growth-promoters (PGPs) under harsh environmental conditions. Our results suggest that BGA-AHB are useful as an opulent source for PGPs in Egyptian agricultural arid soil. | ||
| Keywords | ||
| Blue-green algae (BGA); Associated heterotrophic bacteria (AHB); Anabaenopsis circularis; Nostoc sp; plant growth; arid area | ||
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