Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Master → Brésil → Efeito da seca e chuva sobre a comunidade microbiana da rizosfera de leguminosas da Caatinga

University of São Paulo USP (2014)

Efeito da seca e chuva sobre a comunidade microbiana da rizosfera de leguminosas da Caatinga

Lançoni, Milena Duarte

Titre : Efeito da seca e chuva sobre a comunidade microbiana da rizosfera de leguminosas da Caatinga

Drought and rainy effects on the rizospheric microbial community of leguminous plants of Caatinga

Auteur : Lançoni, Milena Duarte

Université de soutenance : Universidade de São Paulo (USP) Escola Superior de Agricultura Luiz de Queiroz

Grade : Maîtrise 2014

Résumé
Arid climate properties are found distributed throughout the globe. Caatinga is the Brazilian semiarid biome w ith 11% of the national territory and has peculiar climate, rainfall and temperature, and the flora and faunal composition. Plant associated micro-organisms promote defenses and resistance to various biotic and abiotic stresses. This study aims characterized the rhizospheric microbiome of two leguminous trees from Caatinga, Mimosa tenuiflora and Piptadenia stipulacea, their interaction with plant and environment through molecular approaches, T-RFLP of archaeal and bacterial 16S rRNA and high-throughput sequencing by Ion Torrent of the bacterial 16S rRNA addition to statistics methods as assessment tool for evaluation of the interaction. The results show that both arquéial and bacterial communities are different when comparing dry and rainy seasons, plant species do not exercises influences in the population composition, zinc, iron and boron are the most active soil components on the communities. Six of the eleven bacteria genera more abundant in the dry season (<1%) are related to benefits to the plant associated while six have extremophiles characteristics, all of them are : Mycobacterium, Bacillus, MC18, Rhodoplanes, Pseudonocardia, Streptomyces, Candidatus Solibacter, Saccharopolyspora, Rubrobacter, Bradyrhizobium e Solitubrobacter

Mots Clés : Bactérias Biodiversidade Caatinga Leguminosas Seca Semiárido Bacteria Biodiversity Caatinga Drought Leguminous Semi-arid

Présentation

Version intégrale (3,24 Mb)

Page publiée le 4 janvier 2015, mise à jour le 27 juillet 2017