1
|
Del Mazo-Monsalvo I, Santiago-Martínez MG. Microbes produce biofilms to support their communities in nutrient-limited environments. Nat Microbiol 2024; 9:1636-1637. [PMID: 38951665 DOI: 10.1038/s41564-024-01743-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/03/2024]
Affiliation(s)
- Isis Del Mazo-Monsalvo
- The Microbial Ecophysiology Lab, Department of Molecular and Cell Biology, The University of Connecticut, Storrs, CT, USA.
| | | |
Collapse
|
2
|
Rincón-Molina CI, Martínez-Romero E, Aguirre-Noyola JL, Manzano-Gómez LA, Zenteno-Rojas A, Rogel MA, Rincón-Molina FA, Ruíz-Valdiviezo VM, Rincón-Rosales R. Bacterial Community with Plant Growth-Promoting Potential Associated to Pioneer Plants from an Active Mexican Volcanic Complex. Microorganisms 2022; 10:microorganisms10081568. [PMID: 36013987 PMCID: PMC9413462 DOI: 10.3390/microorganisms10081568] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 07/31/2022] [Accepted: 08/01/2022] [Indexed: 02/05/2023] Open
Abstract
Microorganisms in extreme volcanic environments play an important role in the development of plants on newly exposed substrates. In this work, we studied the structure and diversity of a bacterial community associated to Andropogon glomeratus and Cheilanthes aemula at El Chichón volcano. The genetic diversity of the strains was revealed by genomic fingerprints and by 16S rDNA gene sequencing. Furthermore, a metagenomic analysis of the rhizosphere samples was carried out for pioneer plants growing inside and outside the volcano. Multifunctional biochemical tests and plant inoculation assays were evaluated to determine their potential as plant growth-promoting bacteria (PGPB). Through metagenomic analysis, a total of 33 bacterial phyla were identified from A. glomeratus and C. aemula rhizosphere samples collected inside the volcano, and outside the volcano 23 bacterial phyla were identified. For both rhizosphere samples, proteobacteria was the most abundant phylum. With a cultivable approach, 174 bacterial strains were isolated from the rhizosphere and tissue of plants growing outside the volcanic complex. Isolates were classified within the genera Acinetobacter, Arthrobacter, Bacillus, Burkholderia, Cupriavidus, Enterobacter, Klebsiella, Lysinibacillus, Pantoea, Pseudomonas, Serratia, Stenotrophomonas and Pandoraea. The evaluated strains were able to produce indole compounds, solubilize phosphate, synthesize siderophores, showed ACC deaminase and nitrogenase activity, and they had a positive effect on the growth and development of Capsicum chinense. The wide diversity of bacteria associated to pioneer plants at El Chichón volcano with PGPB qualities represent an alternative for the recovery of eroded environments, and they can be used efficiently as biofertilizers for agricultural crops growing under adverse conditions.
Collapse
Affiliation(s)
- Clara Ivette Rincón-Molina
- Laboratorio de Ecología Genómica, Tecnológico Nacional de México, Instituto Tecnológico de Tuxtla Gutiérrez, C.P., Tuxtla Gutierrez 29050, Chiapas, Mexico
| | - Esperanza Martínez-Romero
- Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Av. Universidad s/n, Col. Chamilpa, C.P., Cuernavaca 62210, Morelos, Mexico
| | - José Luis Aguirre-Noyola
- Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Av. Universidad s/n, Col. Chamilpa, C.P., Cuernavaca 62210, Morelos, Mexico
| | - Luis Alberto Manzano-Gómez
- Departamento de Investigación y Desarrollo, 3R Biotec SA de CV, C.P., Tuxtla Gutierrez 29000, Chiapas, Mexico
| | - Adalberto Zenteno-Rojas
- Laboratorio de Ecología Genómica, Tecnológico Nacional de México, Instituto Tecnológico de Tuxtla Gutiérrez, C.P., Tuxtla Gutierrez 29050, Chiapas, Mexico
| | - Marco Antonio Rogel
- Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Av. Universidad s/n, Col. Chamilpa, C.P., Cuernavaca 62210, Morelos, Mexico
| | - Francisco Alexander Rincón-Molina
- Laboratorio de Ecología Genómica, Tecnológico Nacional de México, Instituto Tecnológico de Tuxtla Gutiérrez, C.P., Tuxtla Gutierrez 29050, Chiapas, Mexico
| | - Víctor Manuel Ruíz-Valdiviezo
- Laboratorio de Ecología Genómica, Tecnológico Nacional de México, Instituto Tecnológico de Tuxtla Gutiérrez, C.P., Tuxtla Gutierrez 29050, Chiapas, Mexico
| | - Reiner Rincón-Rosales
- Laboratorio de Ecología Genómica, Tecnológico Nacional de México, Instituto Tecnológico de Tuxtla Gutiérrez, C.P., Tuxtla Gutierrez 29050, Chiapas, Mexico
- Correspondence: ; Tel.: +52-9616150461
| |
Collapse
|
3
|
Did Homocysteine Take Part in the Start of the Synthesis of Peptides on the Early Earth? Biomolecules 2022; 12:biom12040555. [PMID: 35454145 PMCID: PMC9031595 DOI: 10.3390/biom12040555] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 04/04/2022] [Accepted: 04/06/2022] [Indexed: 02/06/2023] Open
Abstract
Unlike its shorter analog, cysteine, and its methylated derivative, methionine, homocysteine is not today a proteinogenic amino acid. However, this thiol containing amino acid is capable of forming an activated species intramolecularly. Its thiolactone could have made it an interesting molecular building block at the origin of life on Earth. Here we study the cyclization of homocysteine in water and show theoretically and experimentally that in an acidic medium the proportion of thiolactone is significant. This thiolactone easily reacts with amino acids to form dipeptides. We envision that these reactions may help interpret why a methionine residue is introduced at the start of all protein synthesis.
Collapse
|