Endophytic bacteria from Euphorbia antiquorum L. protect Solanum lycopersicum L. against bacterial wilt caused by Ralstonia solanacearum

Background Bacterial wilt caused by  Ralstonia solanacearum (syn. Pseudomonas solanacearum ) is the most devastating bacterial disease of tomato ( Solanum lycopersicum  L.) occurring in tropical zones with consequential substantial yield losses in production fields. Currently, microbial technology i...

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Veröffentlicht in:Egyptian journal of biological pest control 2022-06, Vol.32 (1), p.1-13, Article 77
Hauptverfasser: Youmbi, Diane Yimta, Eke, Pierre, Kouokap, Lanvin Rochal Kepngop, Dinango, Vanessa Nya, Tamghe, Gilbert Ghomsi, Wakam, Louise Nana, Boyom, Fabrice Fekam
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Sprache:eng
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Zusammenfassung:Background Bacterial wilt caused by  Ralstonia solanacearum (syn. Pseudomonas solanacearum ) is the most devastating bacterial disease of tomato ( Solanum lycopersicum  L.) occurring in tropical zones with consequential substantial yield losses in production fields. Currently, microbial technology in cropping systems has directed investigations toward biological control agents (BCAs), emphasizing the use of plant endophytes, including bacteria. The present work aimed to evaluate the potential of endophytic bacteria from  Euphorbia antiquorum  L. to suppress bacterial wilt incited by  R. solanacearum in plants . Results Of the 10 endophytic species screened in vitro for their antagonistic activity, 6 exhibited promising potency with minimum inhibitory concentration (MIC) values ranging from 62.50 to 7.81 µg/ml. These species also produced cell wall-degrading enzymes (amylase, protease and cellulase), ammonia, siderophores, indole acetic acid and salicylic acid. The 3 most potent species ( B. amyloliquefaciens  CBa_RA37,  B. velezensis  CBv_BE1 and  B. amyloliquefaciens  CBa_BFL2) enhanced the germination of tomato seeds and protected young tomato plantlets from the devastating effects caused by  R. solanacearum  infection. Conclusions This investigation demonstrated that these endophytic bacteria from  E. antiquorum  L. endowed with the ability to improve the growth and protection of tomato plants could be further developed as potential biopesticides to help mitigating the effect of bacterial wilt in tomato farms. Further investigation will set the baseline for formulation and evaluation of their efficacy in the open field.
ISSN:2536-9342
1110-1768
2536-9342
DOI:10.1186/s41938-022-00575-x