Secondary Metabolites Produced by Plant Growth-Promoting Bacterial Endophytes

Narayanan, Zareen; Glick, Bernard R.

doi:10.3390/microorganisms10102008

Cited by 39 publications

(26 citation statements)

References 157 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Plants have long been an important part of natural therapies of the world, and there have been numerous examples of natural active ingredients extracted from medicinal plants to develop novel and effective preparations (Narayanan and Glick, 2022 ). In E. ulmoides , as an endemic economic tree species and source of tonic herbs in China, screening endophytes associated with active ingredients from its medicinal parts is an effective way to improve the quality of medicinal materials and meet the needs of pharmaceutical and agricultural production.…”

Section: Discussionmentioning

confidence: 99%

Characteristics of endophytic bacteria and active ingredients in the Eucommiae cortex from different origins

Liang

Zhou

et al. 2023

Front. Microbiol.

View full text Add to dashboard Cite

ObjectiveThis study aimed to explore the differences between Eucommiae cortex (EC) endophytic bacteria from different origins and their effects on the active ingredients of EC.MethodsA total of 10 samples of Eucommia ulmoides Oliv. (E. ulmoides) bark were collected from each of the following four regions, namely, Zunyi in Guizhou (GZ), Baokang in Hubei (HUB), Cili in Hunan (HUN), and Loyang in Shaanxi (SX). Subsequently, the contents of the main active ingredients of EC were determined by ultra-performance liquid chromatography (UPLC), and the endophytic bacteria of EC were detected by 16S rRNA sequencing. The relationship between the dominant endophytic bacteria and the active ingredients was investigated by correlation analysis.ResultsA total of 4,551 different operational taxonomic units (OTUs) were delineated in the four groups of samples, of which 585, 439, 957, and 684 genera were annotated from GZ, HUB, HUN, and SX, respectively. The richness and diversity of endophytic bacteria from different origins were ranked as HUN > SX > GZ or HUB. The analysis demonstrated that there was no significant correlation between the diversity and richness of endophytic bacteria in EC and its active ingredients. Nevertheless, notable variations in the community structures of endophytic bacteria were observed across different origins, and they had a considerable impact on certain active ingredients in EC. Comamonas and Cedecea were the dominant genera. Characteristic bacteria of different origins could be clearly distinguished. Simultaneous, significant correlations had been identified between some characteristic endophytic bacteria derived from different origins and active ingredients of EC. For example, Delftia, a characteristic bacterium from GZ, showed a significant positive correlation with pinoresinol diglucoside. Paenibacillus and Klebsiella, two characteristic bacteria from HUB, exhibited significant positive correlations with geniposidic acid. Thauera, a characteristic bacterium from HUN, demonstrated a significant positive correlation with geniposide. Brevundimonas, a characteristic bacterium from SX, displayed a significant positive correlation with pinoresinol diglucoside.ConclusionThere was a complex correlation between EC endophytic bacteria and active ingredient content, while EC endophytic bacteria from different origins had significant differences at the genus level.

show abstract

Section: Discussionmentioning

confidence: 99%

Characteristics of endophytic bacteria and active ingredients in the Eucommiae cortex from different origins

Liang

Zhou

et al. 2023

Front. Microbiol.

View full text Add to dashboard Cite

show abstract

“…These carry out mechanisms like nutrient fixation, neutralizing biotic and abiotic stress, and producing volatile organic compounds (VOCs) and enzymes to prevent diseases. However, the mode of action is different depending on PGPR-types and varies according to the type of host plant [23]. Our unpublished data report that some native maizes have been shown to induce the synthesis of anthocyanin and phenolic compounds in response to drought or waterlogging (unpublished data), cold, high salinity, or nutrient deficiency stresses.…”

Section: Chemical Responsesmentioning

confidence: 98%

Plant-Growth Promoting Endophytic Bacteria and Their Role for Maize Acclimatation to Abiotic Stress

Torre¹,

Rocha²

2023

Abiotic Stress in Plants - Adaptations to Climate Change

View full text Add to dashboard Cite

In order to grow, reproduce, and defend themselves, maize plants use various strategies to obtain adaptive advantages in varying conditions, for example, to tolerate abiotic stress (e.g., drought or heat due to climate change). One of these strategies is the establishment of interactions with plant-growth-promoting bacteria. Bacteria can be associated with plants in the rhizosphere, rhizoplane, or as endophytes. Recent evidence suggest that modern agricultural practices are detrimental to these beneficial plant-microbe interactions, and reservoirs like traditional agroecosystems called milpas, emerge as sources of microbiota associated with maize crops, with increased diversity and beneficial functions. Particularly, bacterial endophytes associated with native maize from milpas show promising features for their use as plant-growth-promoting inoculates, however, it is necessary to first understand the mechanisms known for beneficial functions of endophytes associated with maize and other plants. Here, we review the mechanisms of beneficial interactions between plants and endophytic bacteria, with emphasis on maize and with mentions of recent findings on maize landraces from milpa systems.

show abstract

“…Plant growth‐promoting bacteria (PGPB) comprise a varied collection of prokaryotes found in the rhizosphere (known as rhizobacteria), occupying root nodules (known as rhizobia), or residing inside the tissues of plants (known as endophytes) (Y. Ma et al, 2016; Narayanan & Glick, 2022). These bacterial systems are numerous and often inadequately characterised, but they have been shown to enhance plant growth and provide protection against phytopathogens.…”

Section: Phytoremediationmentioning

confidence: 99%

Bioremediation of mercury contaminated soil and water: A review

Kumar,

Chawla

et al. 2023

Land Degrad Dev

View full text Add to dashboard Cite

Mercury (Hg) pollution of soil and water environments is a major global threat to human health, agri‐food systems and ecosystems and industrial activities mainly coal combustion augmented their content in different environmental media. Bioremediation is a nature‐based solution involving microbial‐ and plant‐based (phytoremediation) technologies that clean‐up Hg contaminated sites. Here, we review Hg‐resistant bacteria and how latest insights in our understanding of the cellular and biochemical mechanisms of the mer operon genes responsible for Hg resistance and transformation have facilitated developments in microbial Hg‐bioremediation. We also review the phytoremediation mechanisms, including those of bacterial‐ and fungi‐assisted phytoremediation processes, which have shown promising results in reducing Hg2+ to Hg0. This review provides a detailed knowledge of novel Hg bioremediation mechanisms and methods. Consequently, microbial‐ and phyto‐based bioremediation technologies have a critical role in the reclamation of Hg‐contaminated environments and the protection of human health and ecosystems.

show abstract

Secondary Metabolites Produced by Plant Growth-Promoting Bacterial Endophytes

Cited by 39 publications

References 157 publications

Characteristics of endophytic bacteria and active ingredients in the Eucommiae cortex from different origins

Characteristics of endophytic bacteria and active ingredients in the Eucommiae cortex from different origins

Plant-Growth Promoting Endophytic Bacteria and Their Role for Maize Acclimatation to Abiotic Stress

Bioremediation of mercury contaminated soil and water: A review

Contact Info

Product

Resources

About