Статья

Bioprospecting desert plant Bacillus endophytic strains for their potential to enhance plant stress tolerance

Ameerah BokhariExploration and Petroleum Engineering Center - Advanced Research Center (EXPEC ARC), Saudi Aramco, Dhahran, Saudi ArabiaMagbubah EssackKing Abdullah University of Science and Technology (KAUST), Computational Bioscience Research Center (CBRC), Thuwal, 23955-6900, Kingdom of Saudi ArabiaFeras F. LafiKing Abdullah University of Science and Technology (KAUST), Center for Desert Agriculture, Thuwal, 23955-6900, Kingdom of Saudi ArabiaCristina Andrés‐BarraoKing Abdullah University of Science and Technology (KAUST), Center for Desert Agriculture, Thuwal, 23955-6900, Kingdom of Saudi ArabiaRewaa S. JalalKing Abdullah University of Science and Technology (KAUST), Center for Desert Agriculture, Thuwal, 23955-6900, Kingdom of Saudi ArabiaSoha A. AlamoudiKing Abdulaziz University, Science and Arts College, Department of Biology, Rabigh, 21589, Kingdom of Saudi ArabiaRozaimi RazaliKing Abdullah University of Science and Technology (KAUST), Computational Bioscience Research Center (CBRC), Thuwal, 23955-6900, Kingdom of Saudi ArabiaHanin AlzubaidyKing Abdullah University of Science and Technology (KAUST), Center for Desert Agriculture, Thuwal, 23955-6900, Kingdom of Saudi ArabiaKausar Hussain ShahBahauddin Zakariya University, Institute of Pure and Applied Biology, Multan, 60800, PakistanShahid SiddiqueUC Davis, Department of Entomology and Nematology, One Shields Avenue, Davis, USAVladimir B. BajićKing Abdullah University of Science and Technology (KAUST), Computational Bioscience Research Center (CBRC), Thuwal, 23955-6900, Kingdom of Saudi ArabiaHeribert HirtKing Abdullah University of Science and Technology (KAUST), Center for Desert Agriculture, Thuwal, 23955-6900, Kingdom of Saudi Arabia. [email protected]Maged M. SaadKing Abdullah University of Science and Technology (KAUST), Center for Desert Agriculture, Thuwal, 23955-6900, Kingdom of Saudi Arabia

2019en

ABI

Аннотация

Plant growth-promoting bacteria (PGPB) are known to increase plant tolerance to several abiotic stresses, specifically those from dry and salty environments. In this study, we examined the endophyte bacterial community of five plant species growing in the Thar desert of Pakistan. Among a total of 368 culturable isolates, 58 Bacillus strains were identified from which the 16 most divergent strains were characterized for salt and heat stress resilience as well as antimicrobial and plant growth-promoting (PGP) activities. When the 16 Bacillus strains were tested on the non-host plant Arabidopsis thaliana, B. cereus PK6-15, B. subtilis PK5-26 and B. circulans PK3-109 significantly enhanced plant growth under salt stress conditions, doubling fresh weight levels when compared to uninoculated plants. B. circulans PK3-15 and PK3-109 did not promote plant growth under normal conditions, but increased plant fresh weight by more than 50% when compared to uninoculated plants under salt stress conditions, suggesting that these salt tolerant Bacillus strains exhibit PGP traits only in the presence of salt. Our data indicate that the collection of 58 plant endophytic Bacillus strains represents an important genomic resource to decipher plant growth promotion at the molecular level.

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Идентификаторы

DOI: 10.1038/s41598-019-54685-y

Цитирования и источники

Цитирований: 2Использованных источников: 0

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