ORCID Profile
0000-0003-3284-0605
Current Organisation
Universidad Nacional Autónoma de México (UNAM)
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Publisher: Springer Science and Business Media LLC
Date: 23-08-2018
DOI: 10.1038/S41598-018-31168-0
Abstract: Microbiomes influence plant establishment, development, nutrient acquisition, pathogen defense, and health. Plant microbiomes are shaped by interactions between the microbes and a selection process of host plants that distinguishes between pathogens, commensals, symbionts and transient bacteria. In this work, we explore the microbiomes through massive sequencing of the 16S rRNA genes of microbiomes two Marchantia species of liverworts. We compared microbiomes from M . polymorpha and M . paleacea plants collected in the wild relative to their soils substrates and from plants grown in vitro that were established from gemmae obtained from the same populations of wild plants. Our experimental setup allowed identification of microbes found in both native and in vitro Marchantia species. The main OTUs (97% identity) in Marchantia microbiomes were assigned to the following genera: Methylobacterium , Rhizobium , Paenibacillus , Lysobacter , Pirellula , Steroidobacter , and Bryobacter . The assigned genera correspond to bacteria capable of plant-growth promotion, complex exudate degradation, nitrogen fixation, methylotrophs, and disease-suppressive bacteria, all hosted in the relatively simple anatomy of the plant. Based on their long evolutionary history Marchantia is a promising model to study not only long-term relationships between plants and their microbes but also the transgenerational contribution of microbiomes to plant development and their response to environmental changes.
Publisher: American Society for Microbiology
Date: 11-2011
DOI: 10.1128/JB.06045-11
Abstract: Bacteria of the genus Citricoccus have been isolated from ecological niches characterized by erse abiotic stress conditions. Here we report the first genome draft of a strain of the genus Citricoccus isolated from the extremely oligotrophic Churince system in the Cuatro Ciénegas Basin (CCB) in Coahuila, Mexico.
Publisher: Springer Science and Business Media LLC
Date: 04-2011
Abstract: Mycoparasitism, a lifestyle where one fungus is parasitic on another fungus, has special relevance when the prey is a plant pathogen, providing a strategy for biological control of pests for plant protection. Probably, the most studied biocontrol agents are species of the genus Hypocrea / Trichoderma . Here we report an analysis of the genome sequences of the two biocontrol species Trichoderma atroviride (teleomorph Hypocrea atroviridis ) and Trichoderma virens (formerly Gliocladium virens , teleomorph Hypocrea virens ), and a comparison with Trichoderma reesei (teleomorph Hypocrea jecorina ). These three Trichoderma species display a remarkable conservation of gene order (78 to 96%), and a lack of active mobile elements probably due to repeat-induced point mutation. Several gene families are expanded in the two mycoparasitic species relative to T. reesei or other ascomycetes, and are overrepresented in non-syntenic genome regions. A phylogenetic analysis shows that T. reesei and T. virens are derived relative to T. atroviride . The mycoparasitism-specific genes thus arose in a common Trichoderma ancestor but were subsequently lost in T. reesei . The data offer a better understanding of mycoparasitism, and thus enforce the development of improved biocontrol strains for efficient and environmentally friendly protection of plants.
Publisher: Cold Spring Harbor Laboratory
Date: 28-01-2017
DOI: 10.1101/103861
Abstract: Microbiomes influence plant development, establishment, nutrient acquisition, pathogen defense, and the myriad of roles that ultimately impacts plant health. Plants microbiome are shaped through interactions between the microbes (ranging from cooperative functions to chemical warfare) and a selection process entailed by the host plants that distinguishes between pathogens, commensals, symbionts and transient bacteria. The soil is a primary source for microbes colonizing plants, along with other environmental sources including rain and interactions with other organisms. In this work, we explore the microbiomes through massive sequencing of the 16S rRNA gene in the eldest terrestrial plants: Marchantia liverworts. We compared microbiomes from M. polymorpha , and M. paleacea plants collected in the wild and their soils, all together luckily in the same geographical location (sympatric) thus reducing geographic effects and also from plants grown in vitro and established from gemmae obtained from the same population of wild plants. Qualitative and quantitative microbiome analysis allowed us to identify microbes conserved in both native and in vitro Marchantia species. While M. polymorpha native plants microbiomes richness is reduced about M. paleacea , containing almost half of the Operative Taxonomic Units (OTUs) observed in M. paleacea, M. polymorpha grown in vitro exhibits larger OTUs. This ersity differences might be the result of impairment to recognize their microbial partners and being an open niche for opportunistic bacteria. The main OTUs in Marchantia microbiomes were assigned to the genera: Methylobacterium, Rhizobium, Paenibacillus, Lysobacter, Pirellula, Steroidobacter , and Bryobacter . The assigned genera correspond to bacteria capable of plant-growth promotion, complex exudates degradation, nitrogen fixation, methylotrophs, and disease-suppressive bacteria, all hosted in the relatively simple anatomy of the plant that provides refuge on their surfaces, rhizoids, and multiple gas chambers that work as specialized niches for different bacterial groups. Marchantia is a promising model to study not only long-term relationships between plants and their microbes but also the transgenerational impact of microbiomes because of Marchantia long 450 million years under climate change conditions testing microbiome configurations.
Location: Mexico
No related grants have been discovered for Luis David Alcaraz.