Abstract
The identification and use of endophytic bacteria capable of triggering plant growth is an important aim in sustainable agriculture. In nature, plants live in alliance with multiple plant growth-promoting endophytic microorganisms. In the current study, we isolated and identified a new endophytic bacterium from a wild plant species Glyceria chinensis (Keng). The bacterium was designated as a Bacillus altitudinis strain using 16S rDNA sequencing. The endophytic B. altitudinis had a notable influence on plant growth. The results of our assays revealed that the endophytic B. altitudinis raised the growth of different plant species. Remarkably, we found transcriptional changes in plants treated with the bacterium. Genes such as maturase K, tetratricopeptide repeat-like superfamily protein, LOB domain-containing protein, and BTB/POZ/TAZ domain-containing protein were highly expressed. In addition, we identified for the first time an induction in the endophytic bacterium of the major facilitator superfamily transporter and DNA gyrase subunit B genes during interaction with the plant. These new findings show that endophytic B. altitudinis could be used as a favourable candidate source to enhance plant growth in sustainable agriculture.
Highlights
The use of fertilisers in agricultural practice to increase yields has had harmful effects on the environment and quality of the soil for a long time (Worlanyo and Jiangfeng, 2021)
We report a new B. altitudinis endophytic strain isolated from wild plant species
Our finding revealed that the endophytic bacterium induced a key group of genes associated with plant growth-promoting traits
Summary
The use of fertilisers in agricultural practice to increase yields has had harmful effects on the environment and quality of the soil for a long time (Worlanyo and Jiangfeng, 2021). To minimise these negative impacts, the use of microorganisms located in the rhizosphere and in endophytic environments, such as bio-fertilisers, has received increased attention (Atieno et al, 2020). Different plant species are colonised by a great diversity of endophytic bacteria, such as Pseudomonas, Bacillus, Enterobacter, Burkholderia, and Azospirillum (Lodewyckx et al, 2002; Weyens et al, 2009).
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