Gluconacetobacter diazotrophicus exopolysaccharide protects bacterial cells against oxidative stress in vitro and during rice plant colonization

Meneses, Carlos; Gonçalves, Thays Araujo; Alquéres, Sylvia Maria Campbell; Rouws, Luc Felicianus Marie; Serrato, Rodrigo Vassoler; Vidal, Márcia Soares; Baldani, José Ivo

doi:10.1007/s11104-017-3201-5

Cited by 51 publications

(16 citation statements)

References 68 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Colonization was reduced in an EPS knockout strain of G. diazotrophicus . Interestingly, this reduction in colonization was rescued by the addition of EPS produced by the wild type strain [ 76 ]. In another study, Balsanelli et al analyzed the mutant strains of Herbaspirillum seropedicae that are deficient in EPS production and concluded that EPS is not required for plant colonization, which could potentially point to a variation in the genes required for colonization across different endophyte species [ 77 ].…”

Section: Attachment Of Bacterial Endophytes To the Host Plant Surfmentioning

confidence: 99%

Bacterial Endophyte Colonization and Distribution within Plants

2017

View full text Add to dashboard Cite

The plant endosphere contains a diverse group of microbial communities. There is general consensus that these microbial communities make significant contributions to plant health. Both recently adopted genomic approaches and classical microbiology techniques continue to develop the science of plant-microbe interactions. Endophytes are microbial symbionts residing within the plant for the majority of their life cycle without any detrimental impact to the host plant. The use of these natural symbionts offers an opportunity to maximize crop productivity while reducing the environmental impacts of agriculture. Endophytes promote plant growth through nitrogen fixation, phytohormone production, nutrient acquisition, and by conferring tolerance to abiotic and biotic stresses. Colonization by endophytes is crucial for providing these benefits to the host plant. Endophytic colonization refers to the entry, growth and multiplication of endophyte populations within the host plant. Lately, plant microbiome research has gained considerable attention but the mechanism allowing plants to recruit endophytes is largely unknown. This review summarizes currently available knowledge about endophytic colonization by bacteria in various plant species, and specifically discusses the colonization of maize plants by Populus endophytes.

show abstract

Section: Attachment Of Bacterial Endophytes To the Host Plant Surfmentioning

confidence: 99%

Bacterial Endophyte Colonization and Distribution within Plants

2017

View full text Add to dashboard Cite

show abstract

“…EPS have also been reported to exhibit high antioxidant property and confer tolerance to bacteria against ROS-dependent cell death. In this context, Meneses et al (2017) demonstrated EPSmediated protection of endophytic bacterium Gluconacetobacter diazotrophicus against oxidative damage in vitro and during colonization of rice plants. Similarly, EPS produced by a halotolerant endophyte Glutamicibacter halophytocola KLBMP 5180 was evaluated for its multilayer antioxidant activity that can be exploited to alleviate salt stress damage in crops (Xiong et al, 2020).…”

Section: Exopolysaccharides (Eps)mentioning

confidence: 99%

Secondary Metabolites From Halotolerant Plant Growth Promoting Rhizobacteria for Ameliorating Salinity Stress in Plants

et al. 2020

View full text Add to dashboard Cite

Soil salinization has emerged as one of the prime environmental constraints endangering soil quality and agricultural productivity. Anthropogenic activities coupled with rapid pace of climate change are the key drivers of soil salinity resulting in degradation of agricultural lands. Increasing levels of salt not only impair structure of soil and its microbial activity but also restrict plant growth by causing harmful imbalance and metabolic disorders. Potential of secondary metabolites synthesized by halotolerant plant growth promoting rhizobacteria (HT-PGPR) in the management of salinity stress in crops is gaining importance. A wide array of secondary metabolites such as osmoprotectants/compatible solutes, exopolysaccharides (EPS) and volatile organic compounds (VOCs) from HT-PGPR have been reported to play crucial roles in ameliorating salinity stress in plants and their symbiotic partners. In addition, HT-PGPR and their metabolites also help in prompt buffering of the salt stress and act as biological engineers enhancing the quality and productivity of saline soils. The review documents prominent secondary metabolites from HT-PGPR and their role in modulating responses of plants to salinity stress. The review also highlights the mechanisms involved in the production of secondary metabolites by HT-PGPR in saline conditions. Utilizing the HT-PGPR and their secondary metabolites for the development of novel bioinoculants for the management of saline agro-ecosystems can be an important strategy in the future.

show abstract

“…A reduced colonization was observed in EPS knockout strains of G. diazotrophicus. Interestingly, this reduction in colonization was reverted by addition of EPS produced by wild strain (Meneses et al 2017). …”

Section: Attachment On Root Surfacementioning

confidence: 99%

Mechanistic insights on plant root colonization by bacterial endophytes: a symbiotic relationship for sustainable agriculture

Jha

Panwar

2018

Environmental Sustainability

View full text Add to dashboard Cite

Plant-microbe and soil interactions are one of the oldest muse for multi-disciplinary researchers. Plant growth promoting microorganisms influence the host physiology by secreting regulatory chemical signals in the vicinity of plant roots and play a key role in the enhancement of plant growth and expansion. The present review deals with the in-depth understanding of steps involved in host tissues colonization by bacterial endophytes. The molecular insights of these events, particularly for endophytic bacteria, are poorly documented till date. The endophytic bacteria must coexist with the host plant and capable of colonizing the internal plant tissues without being recognized as a pathogen. A proper understanding of exchange of signals between the host plant and bacterial communities is required which may facilitate the development of new strategies to promote beneficial interactions between them. This knowledge can be instrumental in agricultural practices as well as for phytoremediation of pollutants. Keeping these facts in mind, the present review attempts to explore the systematic understanding of steps involved and molecular insights of plant colonization events by endophytic bacteria. We conclude that molecular mechanisms and factors affecting endophytic bacterial colonization deserve more research attention in order to exploit their beneficial aspects for sustainable agriculture and environment.

show abstract

Gluconacetobacter diazotrophicus exopolysaccharide protects bacterial cells against oxidative stress in vitro and during rice plant colonization

Cited by 51 publications

References 68 publications

Bacterial Endophyte Colonization and Distribution within Plants

Bacterial Endophyte Colonization and Distribution within Plants

Secondary Metabolites From Halotolerant Plant Growth Promoting Rhizobacteria for Ameliorating Salinity Stress in Plants

Mechanistic insights on plant root colonization by bacterial endophytes: a symbiotic relationship for sustainable agriculture

Contact Info

Product

Resources

About