The evolutionary ecology of rhizobia: multiple facets of competition before, during, and after symbiosis with legumes

Burghardt, Liana T.; diCenzo, George C.

doi:10.1016/j.mib.2023.102281

Cited by 18 publications

(9 citation statements)

References 61 publications

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“…All the examples mentioned so far in this review (and also reviewed by others; ( Barea et al., 2005 ; Afkhami et al., 2020 ; Checcucci and Marchetti, 2020 ; Burghardt and diCenzo, 2023 )) show that rhizobial fitness can be modified by the presence of other microorganisms at the different steps of the life cycle. Therefore, microbial communities will change the selective pressures acting on rhizobial populations, and thus their evolutionary trajectories.…”

Section: Towards the Incorporation Of Ecological Interactions Into Ev...mentioning

confidence: 58%

The role of microbial interactions on rhizobial fitness

Granada Agudelo,

Ruiz,

Capela

et al. 2023

Front. Plant Sci.

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Rhizobia are soil bacteria that can establish a nitrogen-fixing symbiosis with legume plants. As horizontally transmitted symbionts, the life cycle of rhizobia includes a free-living phase in the soil and a plant-associated symbiotic phase. Throughout this life cycle, rhizobia are exposed to a myriad of other microorganisms that interact with them, modulating their fitness and symbiotic performance. In this review, we describe the diversity of interactions between rhizobia and other microorganisms that can occur in the rhizosphere, during the initiation of nodulation, and within nodules. Some of these rhizobia-microbe interactions are indirect, and occur when the presence of some microbes modifies plant physiology in a way that feeds back on rhizobial fitness. We further describe how these interactions can impose significant selective pressures on rhizobia and modify their evolutionary trajectories. More extensive investigations on the eco-evolutionary dynamics of rhizobia in complex biotic environments will likely reveal fascinating new aspects of this well-studied symbiotic interaction and provide critical knowledge for future agronomical applications.

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Section: Towards the Incorporation Of Ecological Interactions Into Ev...mentioning

confidence: 58%

The role of microbial interactions on rhizobial fitness

Granada Agudelo,

Ruiz,

Capela

et al. 2023

Front. Plant Sci.

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“…PA biosynthesis or availability to PGPR in soil or in their interaction with plants are important as modulators of stress resistance. In soil, the ability to survive for long periods is important in maintaining PGPR populations and giving competitive advantages in the rhizosphere to specific PGPR species [204], and PAs have an important role in this.…”

Section: Discussionmentioning

confidence: 99%

The Biosynthesis and Functions of Polyamines in the Interaction of Plant Growth-Promoting Rhizobacteria with Plants

Dunn,

Becerra-Rivera

2023

Preprint

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Plant growth-promoting rhizobacteria (PGPR) are members of the plant rhizomicrobiome that enhance plant growth and stress resistance by increasing nutrient availability to the plant, producing phytohormones or other secondary metabolites, stimulating plant defense responses against abiotic stresses and pathogens, or fixing nitrogen. The use of PGPR to increase crop yield with minimal environmental impact is a sustainable and readily applicable replacement for a portion of chemical fertilizer and pesticides required for the growth of high-yielding varieties. Increased plant health and productivity have long been gained by applying PGPR as commercial inoculants to crops, although with uneven results. The establishment of plant-PGPR relationships requires the exchange of chemical signals and nutrients between the partners, and polyamines (PAs) are an important class of compounds that act as physiological effectors and signal molecules in plant-microbe interactions. In this review we focus on the role of PAs in interactions between PGPR and plants. We describe the basic ecology of PGPR and production and function of PAs in them and in the plants with which they interact. We examine the metabolism and the roles of PAs in PGPR and plants individually and during their interaction with one another. Lastly, we describe some directions for future research.

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“…A change in the availability of microbial partners matters because plant-microbe interactions vary in specificity, especially in the legume-rhizobia system (Chen et al 2021), which could lead to shifts in plant communities and plant ranges (Harrison et al 2018). The increased abundance 28 and diversity of rhizobia could also shape evolution in the rhizobia-legume system through increased bacterial competition (Burghardt & diCenzo 2023).…”

Section: Climate Events On Symbiotic Microbesmentioning

confidence: 99%

Resistance and resilience of soil microbiomes under climate change

Boyle,

Murphy,

Ensminger

et al. 2023

Preprint

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Soil microbiomes play key roles in plant productivity and nutrient cycling, and we need to understand whether and how they will withstand the effects of global climate change. We exposed in situ soil microbial communities to multiple rounds of heat, drought, or both treatments, and profiled microbial communities with 16S rRNA and ITS amplicon sequencing during and after these climatic changes, and then tested how domain and symbiotic lifestyle affected response. Fungal community composition strongly shifted due to drought and its legacy. In contrast, bacterial community composition resisted change during the experiment, but still was affected by the legacy of drought. We identified fungal and bacterial taxa with differential abundance due to heat and drought and found that taxa affected during climate events are not necessarily the taxa affected in recovery periods, showing the complexity and importance of legacy effects. Additionally, we found evidence that symbiotic groups of microbes important to plant performance respond in diverse ways to climate treatments and their legacy, suggesting plants may be impacted by past climatic events like drought and warming even if they do not experience the event themselves.

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The evolutionary ecology of rhizobia: multiple facets of competition before, during, and after symbiosis with legumes

Cited by 18 publications

References 61 publications

The role of microbial interactions on rhizobial fitness

The role of microbial interactions on rhizobial fitness

The Biosynthesis and Functions of Polyamines in the Interaction of Plant Growth-Promoting Rhizobacteria with Plants

Resistance and resilience of soil microbiomes under climate change

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