Growth promotion in Arabidopsis thaliana by bacterial cyclodipeptides involves the TOR/S6K pathway activation
| Autor: | Jesús Campos-García, Brenda Berenice Palacios-Nava, César Arturo Peña-Uribe, Omar González-López, Ernesto García-Pineda, Homero Reyes de la Cruz, José López-Bucio |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine Physiology Arabidopsis P70-S6 Kinase 1 Plant Science 01 natural sciences Peptides Cyclic 03 medical and health sciences Bacterial Proteins Ribosomal protein Arabidopsis thaliana Plant Proteins biology Chemistry Kinase Ribosomal Protein S6 Kinases TOR Serine-Threonine Kinases Dipeptides biology.organism_classification Cell biology 030104 developmental biology Pseudomonas aeruginosa Phosphorylation Signal transduction Agronomy and Crop Science Bacteria 010606 plant biology & botany Signal Transduction |
| Zdroj: | Journal of plant physiology. 257 |
| ISSN: | 1618-1328 |
| Popis: | Cyclodipeptides (CDPs) are the smallest peptidic molecules that can be produced by diverse organisms such as bacteria, fungi, and animals. They have multiple biological effects. In this paper, we examined the CDPs produced by the bacteria Pseudomonas aeruginosa PAO1, which are known as opportunistic pathogens of humans and plants on TARGET OF RAPAMYCIN (TOR) signaling pathways, and regulation of root system architecture. This bacterium produces the bioactive CDPs: cyclo(L-Pro-L-Leu), cyclo(L-Pro-L-Phe), cyclo(L-Pro-L-Tyr), and cyclo(L-Pro-L-Val). In a previous report, these molecules were found to modulate basic cellular programs not only via auxin mechanisms but also by promoting the phosphorylation of the S6 ribosomal protein kinase (S6K), a downstream substrate of the TOR kinase. In the present work, we found that the inoculation of Arabidopsis plants with P. aeruginosa PAO1, the non-pathogenic P. aeruginosa ΔlasI/Δrhll strain (JM2), or by direct exposure of plants to CDPs influenced growth and promoted root branching depending upon the treatment imposed, while genetic evidence using Arabidopsis lines with enhanced or decreased TOR levels indicated a critical role of this pathway in the bacterial phytostimulation. |
| Databáze: | OpenAIRE |
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