EXPLORING THE POTENTIAL OF ANTAGONISTIC ENDOPHYTIC BACTERIA ISOLATED FROM MEDICINAL PLANTS AND ITS SUPPRESSIVE EFFECT ON SOIL BORNE FUNGAL DISEASES OF TOMATO | ||||
| Zagazig Journal of Agricultural Research | ||||
| Volume 51, Issue 6, November and December 2024, Page 2081-2094 PDF (763.83 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/zjar.2024.403410 | ||||
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| Authors | ||||
Alyaa Ab El-Wahab; Heba M. Abd El-Nabi; Amal M. Abd-Elmageed; Alaa Fathalla 
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| Agric. Bot. Dept., Fac. Agric., Suez Canal Univ., Egypt | ||||
| Abstract | ||||
| Medicinal plants host a variety of endophytic microbes that hold significant economic value. The present study is therefore focused on the isolation and identification of bacterial endophytes from medicinal plants growing in the arid region of Al-Arish (Egypt) and their potential role as bioinoculants for enhancing the growth of tomato plants. In this study, eight endophytic bacterial isolates showed direct broad spectrum in vitro antagonism against the tested fungi. On the basis of antagonism activity, these isolates were studied to identify based on their 16S rRNA gene sequences, as Lysinibacillus fusiformis, Bacillus pumilus, B. siamensis, Paenibacillus peoriae, Paenib. Polymyxa, Pseudomonas aeruginosa, Brevundimonas diminuta, and Providencia vermicola. The strains were screened for various plant growth-promoting (PGP) attributes, including indole-3-acetic acid (IAA), ammonia, siderophores, phosphatase, hydrolytic enzyme production and phosphate solubilization. Isolated bacterial strains have variable plant growth promoting activities. Two selected endophytic bacterial strains were assessed for their biological control potential against tomato fungal root rot disease caused by Fusarium oxysporum and Rhizoctonia solani to further evaluate their PGP abilities under greenhouse conditions. Under greenhouse, B. pumilus NAW4 and P. aeruginosa NAW6 proved effective in conferring positive benefits to tomatoes placed under stress as well as under normal growing conditions | ||||
| Keywords | ||||
| Medicinal plants; Endophytes; Antagonism activity; Bioinoculants; Tomato plants | ||||
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