Journal
SCIENTIFIC REPORTS
Volume 7, Issue -, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/srep41564
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Funding
- National High Technology Research and Development Program of China (863 program) [2013AA102802]
- National Natural Science Foundation of China [31100001]
- Natural Science Foundation of Shaanxi Province, China [2016JM3014]
- Fundamental Research Funds for the Central Universities [2452016010]
- Opening Project of the State Key Laboratory of Crop Stress Biology for Arid Areas [CSBAA2015005]
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A novel strain LTYR-11ZT that exhibited multiple plant growth promoting (PGP) traits was isolated from the surface-sterilized leaves of Alhagi sparsifolia Shap. (Leguminosae), which reprsents one of the top drought tolerant plants in north-west China. Phylogenetic analysis of 16S rRNA gene sequences and multilocus sequence analysis based on partial sequences of atpD, gyrB, infB and rpoB genes revealed that strain LTYR-11Z(T) was a member of the genus Pantoea, with Pantoea theicola NBRC 110557(T) and Pantoea intestinalis DSM 28113(T) as the closest phylogenetic relatives. The results of DNA-DNA hybridization, phenotypic tests and fatty acid analysis confirmed that strain LTYR-11Z(T) represents a novel species of the genus Pantoea, for which we propose the name Pantoea alhagi sp. nov. Confocal microscopy observation revealed that strain LTYR-11Z(T) effectively colonizes the rhizoplane of both Arabidopsis and wheat. Strain LTYR-11Z(T) was able to promote the growth of wheat enhancing its resistance to drought stress. Strain LTYR-11Z(T) led to increased accumulation of soluble sugars, decreased accumulation of proline and malondialdehyde (MDA), and decreased degradation of chlorophyll in leaves of drought-stressed wheat. Our findings will contribute to the development of a novel biotechnological agent to improve the adaptation of crop plants to drought in arid ecosystems.
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