Gibberellins and indole-3-acetic acid producing rhizospheric bacterium Leifsonia xyli SE134 mitigates the adverse effects of copper-mediated stress on tomato
| Autor: | Abdul Latif Khan, Sang-Mo Kang, Sajjad Asaf, Ah-Yeong Kim, Yeon-Gyeong Park, In-Jung Lee, Muhammad Waqas, Muhammad Hamayun |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
0301 basic medicine Leifsonia xyli Plant Science phenols Biology tomato lcsh:Plant culture Rhizobacteria 01 natural sciences 03 medical and health sciences chemistry.chemical_compound Dry weight Botany lcsh:SB1-1110 Ecology Evolution Behavior and Systematics Rhizosphere Super oxide dismutase fungi food and beverages lcsh:QK900-989 biology.organism_classification phytohormones Horticulture 030104 developmental biology chemistry super oxide dismutase PGPR Shoot flavonoids lcsh:Plant ecology Gibberellin Cu stress Indole-3-acetic acid amino acid 010606 plant biology & botany |
| Zdroj: | Journal of Plant Interactions, Vol 12, Iss 1, Pp 373-380 (2017) |
| ISSN: | 1742-9153 1742-9145 |
| Popis: | Beneficial bacteria living in the rhizosphere pose several implications on plant growth promotion and are highly desirable for sustainable agriculture. In the current study, we explored the ameliorative capacity of Leifsonia xyli SE134, a plant growth-promoting rhizobacteria (PGPR), against copper (Cu) stress on tomato grown under elevated Cu levels of 50 and 100 mM. Initially, L. xyli SE134 modulated innate gibberellins (GAs) and indole-3-acetic acid (IAA) metabolism in response to elevated Cu toxicity. The IAA contents increased, whereas that of bioactive GAs decreased in relation to Cu concentration gradient in the broth media. Furthermore, exposure to elevated Cu caused detrimental effects on the physiological attributes as revealed by attenuated shoot length, root length, stem diameter, shoot dry weight, root dry weight, and chlorophyll content in non-inoculated tomatoes as compared to L. xyli SE134 inoculated plants. The growth rescuing effect of L. xyli SE134 may be attributed to the modulation of endogenous amino acids contents in plants, such as glutamic acid, threonine, phenylalanine, glycine, proline, and arginine. Moreover, L. xyli SE134 inoculation stimulated total polyphenol and flavonoid content, reduced super oxide dismutase activity, strongly inhibited Cu, and increased phosphorus and iron content in plants grown under elevated Cu stress. In the absence of Cu toxicity, L. xyli SE134 significantly enhanced amino acid content, improved total flavonoids, and increased phosphorus content, thus resulting in higher plant growth. |
| Databáze: | OpenAIRE |
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