Halophilic rhizobacteria from Distichlis spicata promote growth and improve salt tolerance in heterologous plant hosts

Palacio-Rodríguez, Rubén; Coria‐Arellano, Jessica Lizbeth; López‐Bucio, José; Sánchez-Salas, Jaime; Muro-Pérez, Gisela; Castañeda, Gamaliel; Sáenz‐Mata, Jorge

doi:10.1007/s13199-017-0481-8

Cited by 43 publications

(26 citation statements)

References 58 publications

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“…Major RmBm31-induced changes on root morphology are the stimulation of lateral root formation and root hair development. These root system architecture modifications are reminiscent of those observed with other PGPR strains (Ortíz-Castro et al, 2011;Zamioudis et al, 2013;Verbon and Liberman, 2016 ;Palacio-Rodríguez et al, 2017). Noteworthy, auxin signaling and transport have been shown to play an important role in these PGPRinduced effects (Ortíz-Castro et al, 2011;Zamioudis et al, 2013;Zamioudis et al, 2015).…”

Section: B Megaterium Rmbm31 Promotes Plant Growth and Root Developmmentioning

confidence: 59%

Unearthing the Plant Growth-Promoting Traits of Bacillus megaterium RmBm31, an Endophytic Bacterium Isolated From Root Nodules of Retama monosperma

et al. 2020

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Plants live in association with complex populations of microorganisms, including Plant Growth-Promoting Rhizobacteria (PGPR) that confer to plants an improved growth and enhanced stress tolerance. This large and diverse group includes endophytic bacteria that are able to colonize the internal tissues of plants. In the present study, we have isolated a nonrhizobial species from surface sterilized root nodules of Retama monosperma, a perennial leguminous species growing in poor and high salinity soils. Sequencing of its genome reveals this endophytic bacterium is a Bacillus megaterium strain (RmBm31) that possesses a wide range of genomic features linked to plant growth promotion. Furthermore, we show that RmBm31 is able to increase the biomass and positively modify the root architecture of seedlings of the model plant species Arabidopsis thaliana both in physical contact with its roots and via the production of volatile organic compounds. Lastly, we investigated the molecular mechanisms implicated in RmBm31 plant beneficial effects by carrying out a transcriptional analysis on a comprehensive set of phytohormone-responsive marker genes. Altogether, our results demonstrate that RmBm31 displays plant growth-promoting traits of potential interest for agricultural applications.

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Section: B Megaterium Rmbm31 Promotes Plant Growth and Root Developmmentioning

confidence: 59%

Unearthing the Plant Growth-Promoting Traits of Bacillus megaterium RmBm31, an Endophytic Bacterium Isolated From Root Nodules of Retama monosperma

et al. 2020

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“…At the phylogenetic level, Firmicutes, Actinobacteria, and Gammaproteobacteria were the dominant phyla reported among the culture-dependent and culture-independent populations nesting various root compartments of halophytes [27] , [30] , [39] , [40] , [41] , [42] , [43] , [44] , [45] . Among the strains classified to Firmicutes, Bacillus spp.…”

Section: Discussionmentioning

confidence: 99%

“…nov., and Pantibacillus spp. [40] , [41] , [42] , [43] , [45] . The genus Halomonas was often detected in the root environments of halophytes, and Marasco et al [44] found that such salt-loving bacteria replaced the genera Marinobacter and Alcanivorax found in the supratidal rhizosphere of Salicornia strobilacea.…”

Section: Discussionmentioning

confidence: 99%

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A novel plant-based-sea water culture media for in vitro cultivation and in situ recovery of the halophyte microbiome

Saleh

Sarhan

Mourad

et al. 2017

Journal of Advanced Research

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“…Recent research identified two halophilic bacteria as Bacillus sp. and Pseudomonas lini that promoted growth under standard and saline conditions in Arabidopsis, cucumber and water melon, and thus rhizobacteria from extreme environments may extend their probiotic traits to horticultural species (Palacio-Rodr ıguez et al, 2017;Fitzpatrick et al, 2018). As Achromobacter sp.…”

Section: Discussionmentioning

confidence: 99%

The plant beneficial rhizobacteriumAchromobactersp. 5B1 influences root development through auxin signaling and redistribution

et al. 2020

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SUMMARY Roots provide physical and nutritional support to plant organs that are above ground and play critical roles for adaptation via intricate movements and growth patterns. Through screening the effects of bacterial isolates from roots of halophyte Mesquite (Prosopis sp.) on Arabidopsis thaliana, we identified Achromobacter sp. 5B1 as a probiotic bacterium that influences plant functional traits. Detailed genetic and architectural analyses in Arabidopsis grown in vitro and in soil, cell division measurements, auxin transport and response gene expression and brefeldin A treatments demonstrated that root colonization with Achromobacter sp. 5B1 changes the growth and branching patterns of roots, which were related to auxin perception and redistribution. Expression analysis of auxin transport and signaling revealed a redistribution of auxin within the primary root tip of wild‐type seedlings by Achromobacter sp. 5B1 that is disrupted by brefeldin A and correlates with repression of auxin transporters PIN1 and PIN7 in root provasculature, and PIN2 in the epidermis and cortex of the root tip, whereas expression of PIN3 was enhanced in the columella. In seedlings harboring AUX1, EIR1, AXR1, ARF7ARF19, TIR1AFB2AFB3 single, double or triple loss‐of‐function mutations, or in a dominant (gain‐of‐function) mutant of SLR1, the bacterium caused primary roots to form supercoils that are devoid of lateral roots. The changes in growth and root architecture elicited by the bacterium helped Arabidopsis seedlings to resist salt stress better. Thus, Achromobacter sp. 5B1 fine tunes both root movements and the auxin response, which may be important for plant growth and environmental adaptation.

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Halophilic rhizobacteria from Distichlis spicata promote growth and improve salt tolerance in heterologous plant hosts

Cited by 43 publications

References 58 publications

Unearthing the Plant Growth-Promoting Traits of Bacillus megaterium RmBm31, an Endophytic Bacterium Isolated From Root Nodules of Retama monosperma

Unearthing the Plant Growth-Promoting Traits of Bacillus megaterium RmBm31, an Endophytic Bacterium Isolated From Root Nodules of Retama monosperma

A novel plant-based-sea water culture media for in vitro cultivation and in situ recovery of the halophyte microbiome

The plant beneficial rhizobacteriumAchromobactersp. 5B1 influences root development through auxin signaling and redistribution

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