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Publication Type J
Authors Ferreira, M. J., A. Cunha, S. Figueiredo, P. Faustino, C. Patinha, H. Silva and I. N. Sierra-Garcia
Title The Root Microbiome of Salicornia ramosissima as a Seedbank for Plant-Growth Promoting Halotolerant Bacteria
Source Applied Sciences-Basel
Author Keywords halophytes phytobiome rhizosphere endophytic bacteria saline stress
Abstract Featured Application This research provides knowledge into the taxonomic and functional diversity of cultivable bacteria associated with the halophyte Salicornia ramosissima in different types of soil, which need to be considered for the development of rhizosphere engineering technology for the salt tolerant sustainable crops in different environments. Root-associated microbial communities play important roles in the process of adaptation of plant hosts to environment stressors, and in this perspective, the microbiome of halophytes represents a valuable model for understanding the contribution of microorganisms to plant tolerance to salt. Although considered as the most promising halophyte candidate to crop cultivation, Salicornia ramosissima is one of the least-studied species in terms of microbiome composition and the effect of sediment properties on the diversity of plant-growth promoting bacteria associated with the roots. In this work, we aimed at isolating and characterizing halotolerant bacteria associated with the rhizosphere and root tissues of S. ramosissima, envisaging their application in saline agriculture. Endophytic and rhizosphere bacteria were isolated from wild and crop cultivated plants, growing in different estuarine conditions. Isolates were identified based on 16S rRNA sequences and screened for plant-growth promotion traits. The subsets of isolates from different sampling sites were very different in terms of composition but consistent in terms of the plant-growth promoting traits represented. Bacillus was the most represented genus and expressed the wider range of extracellular enzymatic activities. Halotolerant strains of Salinicola, Pseudomonas, Oceanobacillus, Halomonas, Providencia, Bacillus, Psychrobacter and Brevibacterium also exhibited several plant-growth promotion traits (e.g., 3-indole acetic acid (IAA), 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase, siderophores, phosphate solubilization). Considering the taxonomic diversity and the plant-growth promotion potential of the isolates, the collection represents a valuable resource that can be used to optimize the crop cultivation of Salicornia under different environmental conditions and for the attenuation of salt stress in non-halophytes, considering the global threat of arable soil salinization.
Author Address [Ferreira, Maria J.; Cunha, Angela; Figueiredo, Sandro; Faustino, Pedro; Silva, Helena; Sierra-Garcia, Isabel N.] Univ Aveiro, Dept Biol, Campus Santiago, P-3810193 Aveiro, Portugal. [Ferreira, Maria J.; Cunha, Angela; Figueiredo, Sandro; Faustino, Pedro; Silva, Helena; Sierra-Garcia, Isabel N.] Univ Aveiro, CESAM, Campus Santiago, P-3810193 Aveiro, Portugal. [Patinha, Carla] Univ Aveiro, Dept Geosci & Geobiotec, Campus Santiago, P-3810193 Aveiro, Portugal. Sierra-Garcia, IN (corresponding author), Univ Aveiro, Dept Biol, Campus Santiago, P-3810193 Aveiro, Portugal.; Sierra-Garcia, IN (corresponding author), Univ Aveiro, CESAM, Campus Santiago, P-3810193 Aveiro, Portugal. mjoaovf@ua.pt; acunha@ua.pt; sandrofigueiredo@ua.pt; pdrfaustino@gmail.com; cpatinha@ua.pt; hsilva@ua.pt; inatalia.sierra@ua.pt
29-Character Source Abbreviation Appl. Sci.-Basel
Publication Date Mar
Year Published 2021
Volume 11
Issue 5
Digital Object Identifier (DOI) 10.3390/app11052233
Unique Article Identifier WOS:000627976300001

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