Contrasting arbuscular mycorrhizal responses of vascular and non-vascular plants to a simulated Palaeozoic CO2 decline

Field, Katie J.; Cameron, Duncan D.; Leake, Jonathan R.; Tille, Stefanie; Bidartondo, Martin I.; Beerling, David J.

doi:10.1038/ncomms1831

Cited by 95 publications

(159 citation statements)

References 46 publications

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“…Rather, it illustrates the types of questions and variables that can be addressed. Other factors, such as historic atmospheric CO 2 concentrations (98), have been thought to affect the evolution and stability of other plant root mutualisms (99,100) and could likewise be considered in this framework.…”

Section: Discussionmentioning

confidence: 99%

Evolutionary signals of symbiotic persistence in the legume–rhizobia mutualism

Werner

Cornwell

Cornelissen³

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

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Understanding the origins and evolutionary trajectories of symbiotic partnerships remains a major challenge. Why are some symbioses lost over evolutionary time whereas others become crucial for survival? Here, we use a quantitative trait reconstruction method to characterize different evolutionary stages in the ancient symbiosis between legumes (Fabaceae) and nitrogen-fixing bacteria, asking how labile is symbiosis across different host clades. We find that more than half of the 1,195 extant nodulating legumes analyzed have a high likelihood (>95%) of being in a state of high symbiotic persistence, meaning that they show a continued capacity to form the symbiosis over evolutionary time, even though the partnership has remained facultative and is not obligate. To explore patterns associated with the likelihood of loss and retention of the N 2 -fixing symbiosis, we tested for correlations between symbiotic persistence and legume distribution, climate, soil and trait data. We found a strong latitudinal effect and demonstrated that low mean annual temperatures are associated with high symbiotic persistence in legumes. Although no significant correlations between soil variables and symbiotic persistence were found, nitrogen and phosphorus leaf contents were positively correlated with legumes in a state of high symbiotic persistence. This pattern suggests that highly demanding nutrient lifestyles are associated with more stable partnerships, potentially because they "lock" the hosts into symbiotic dependency. Quantitative reconstruction methods are emerging as a powerful comparative tool to study broad patterns of symbiont loss and retention across diverse partnerships.symbiosis | cooperation | deep history | reconstruction | persistence

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Section: Discussionmentioning

confidence: 99%

Evolutionary signals of symbiotic persistence in the legume–rhizobia mutualism

Werner

Cornwell

Cornelissen³

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

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“…For example, a recent study by Nelson and colleagues [22] describes several growth-promoting endophytes associated with the liverwort Marchantia polymorpha , providing fertile ground for future Evo-MPMI research (see [23]). Other Marchantia species were shown to engage in mutualistic interactions with Glomeromycota [24,25]. And other liverwort genera, such as Cephalozia bicuspidata [26], have also been shown to engage in mutualistic interactions with mycorrhizal fungi.…”

Section: Fungal Symbioses Exemplify Ancient Plant-microbe Interactionsmentioning

confidence: 99%

On plant defense signaling networks and early land plant evolution

Vries

Dahlen

Gould

et al. 2018

Communicative & Integrative Biology

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All land plants must cope with phytopathogens. Algae face pathogens, too, and it is reasonable to assume that some of the strategies for dealing with pathogens evolved prior to the origin of embryophytes – plant terrestrialization simply changed the nature of the plant-pathogen interactions. Here we highlight that many potential components of the angiosperm defense toolkit are i) found in streptophyte algae and non-flowering embryophytes and ii) might be used in non-flowering plant defense as inferred from published experimental data. Nonetheless, the common signaling networks governing these defense responses appear to have become more intricate during embryophyte evolution. This includes the evolution of the antagonistic signaling pathways of jasmonic and salicylic acid, multiple independent expansions of resistance genes, and the evolution of resistance gene-regulating microRNAs. Future comparative studies will illuminate which modules of the streptophyte defense signaling network constitute the core and which constitute lineage- and/or environment-specific (peripheral) signaling circuits.

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“…The combined weight of evidence demonstrates that once plants made the transition to the land, roots evolved in a piecemeal fashion independently in several different clades, rapidly acquiring and extending functionality and complexity. As roots evolved, they influenced the development of soils and the weathering of land surfaces, which had major consequences for the geochemical carbon cycle (Field et al, 2012;Lenton et al, 2012;Taylor et al, 2012).…”

mentioning

confidence: 99%

The Origin and Early Evolution of Roots

2014

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Geological sites of exceptional fossil preservation are becoming a focus of research on root evolution because they retain edaphic and ecological context, and the remains of plant soft tissues are preserved in some. New information is emerging on the origins of rooting systems, their interactions with fungi, and their nature and diversity in the earliest forest ecosystems. Remarkably wellpreserved fossils prove that mycorrhizal symbionts were diverse in simple rhizoid-based systems. Roots evolved in a piecemeal fashion and independently in several major clades through the Devonian Period (416 to 360 million years ago), rapidly extending functionality and complexity. Evidence from extinct arborescent clades indicates that polar auxin transport was recruited independently in several to regulate wood and root development. The broader impact of root evolution on the geochemical carbon cycle is a developing area and one in which the interests of the plant physiologist intersect with those of the geochemist.

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Contrasting arbuscular mycorrhizal responses of vascular and non-vascular plants to a simulated Palaeozoic CO2 decline

Cited by 95 publications

References 46 publications

Evolutionary signals of symbiotic persistence in the legume–rhizobia mutualism

Evolutionary signals of symbiotic persistence in the legume–rhizobia mutualism

On plant defense signaling networks and early land plant evolution

The Origin and Early Evolution of Roots

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