Bacteria Involved in Nitrogen-Fixing Legume Symbiosis: Current Taxonomic Perspective

Velázquez, Encarna; García‐Fraile, Paula; Ramírez-Bahena, Martha-Helena; Rivas, Raúl; Martínez‐Molina, Eustoquio

doi:10.1007/978-3-211-99753-6_1

Cited by 21 publications

(16 citation statements)

References 182 publications

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“…plant diversity effects on productivity) but many functions are in reality performed by a combination of different groups of organisms (e.g. nitrogen fixation by a symbiotic relationship of bacteria with plants; Velázquez et al ., ; St John et al ., ). For example, climate‐induced vegetation changes may lead to community‐wide shifts in foliar traits.…”

Section: Discussionmentioning

confidence: 99%

Functional redundancy of multiple forest taxa along an elevational gradient: predicting the consequences of non‐random species loss

Mori

Shiono

Haraguchi

et al. 2015

Journal of Biogeography

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Aims Climate change can substantially alter ecological communities. However, we hypothesized that, even if novel communities emerge, those communities may not be novel in terms of functional composition. To infer the processes associated with rising temperatures, we evaluated elevational taxonomic/functional turnover of plant and invertebrate communities. Because climate change interacts synergistically with other environmental factors, and therefore is not the sole driver of change in ecological communities, we also considered how the taxonomic/functional composition of the communities would be affected by mammalian overgrazing/browsing, which has become prominent in the study region.Location Shiretoko National Park, Shiretoko Peninsular, Hokkaido, Japan.Methods We investigated the diversity of eight groups of organisms (taxa) in forests of northern Japan, and calculated the distance decay of taxonomic/functional similarity (Sørensen's b-diversity) along an elevational gradient. A null model was used to separate functional turnover from taxonomic turnover. We then simulated how taxonomic/functional turnover along the gradient would be changed after non-random loss of species sensitive to mammalian herbivory.Results We found that each group showed elevational decay in taxonomic similarity. Along an elevational gradient, species groups structured by stronger dispersal limitation showed faster species turnover. This suggested differences in the process of climate-induced species reassembly among the groups. We also found that elevational turnover of communities based on functional traits tended to be lower than that based on taxonomic identity for the majority of the groups, supporting our hypothesis of functional redundancy across the elevational gradient. We thus speculated that climate-induced emergence of taxonomically novel communities may have limited influence on critical ecosystem processes supported by functional diversity. Furthermore, while random species loss did not change functional turnover, non-random loss of species attributable to mammalian herbivory substantially accelerated elevational functional turnover of the taxa. This suggested a possible loss of the functional redundancy of communities.Main conclusions Future communities may be novel not simply because climates are changing at unprecedented rates but also because of the synergetic influences of other environmental changes. Thus ecological processes may be more seriously affected in the future than is generally anticipated based on ª 2015 John Wiley

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Section: Discussionmentioning

confidence: 99%

Functional redundancy of multiple forest taxa along an elevational gradient: predicting the consequences of non‐random species loss

Mori

Shiono

Haraguchi

et al. 2015

Journal of Biogeography

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“…Legumes ( Fabaceae or Leguminosae ) is the third largest angiosperm family, with more than 700 genera and 18,000 species with an exceptionally wide range of habitats ( Lewis et al, 2005 ). One of the outstanding characteristics of this family is that most legumes have the ability to establish a symbiotic relationship with soil nitrogen-fixing (N 2 -fixing) rhizobacteria, known collectively as rhizobia, e.g., Rhizobium , Mesorhizobium , Bradyrhizobium , Azorhizobium , Allorhizobium, or Sinorhizobium ( Velázquez et al, 2010 ).…”

Section: Legumes a Promising Tool For CD Phytoremediationmentioning

confidence: 99%

PGPRs and nitrogen-fixing legumes: a perfect team for efficient Cd phytoremediation?

Gómez-Sagasti¹,

Marino

2015

Front. Plant Sci.

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Cadmium (Cd) is a toxic, biologically non-essential and highly mobile metal that has become an increasingly important environmental hazard to both wildlife and humans. In contrast to conventional remediation technologies, phytoremediation based on legume–rhizobia symbiosis has emerged as an inexpensive decontamination alternative which also revitalize contaminated soils due to the role of legumes in nitrogen cycling. In recent years, there is a growing interest in understanding symbiotic legume–rhizobia relationship and its interactions with Cd. The aim of the present review is to provide a comprehensive picture of the main effects of Cd in N 2 -fixing leguminous plants and the benefits of exploiting this symbiosis together with plant growth promoting rhizobacteria to boost an efficient reclamation of Cd-contaminated soils.

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“…Rizobia odznaczają się dużą plastycznością metaboliczną, dzięki czemu mogą bytować w dwóch formach: saprofitycznej żyjącej w glebie oraz symbiotycznej żyjącej w brodawkach roślin bobowatych [3][4][5][6].…”

Section: Wprowadzenieunclassified

Struktura lipopolisacharydów rizobiowych i ich znaczenie w procesie symbiozy

Zamlynska

2020

Postepy Biochem

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Lipopolisacharydy produkowane przez rizobia mają bardzo zróżnicowaną strukturę. Różnice obserwuje się zarówno w lipidzie A (uważanym za najbardziej konserwatywną część LPS), w obrębie regionu rdzeniowego oraz polisacharydu O-swoistego. Lipidy A różnią się między sobą szkieletem cukrowym oraz schematem acylacji. W skład regionu rdzeniowego rizobiów wchodzą głównie heksozy, kwasy uronowe, N-acetylochinowozamina i Kdo, a brakuje w nich typowych dla enterobakterii heptoz. Natomiast O-PSy mogą mieć odmienną strukturę nawet wśród szczepów tego samego gatunku. Zbudowane są z różnych monocukrów i często mają charakter hydrofobowy. Odpowiednia struktura każdej z domen LPS jest wymagana do nawiązania efektywnej symbiozy na poziomie bakteria-roślinny gospodarz. Skutkiem zmian w strukturze LPS (najczęściej powodowanych mutacjami) było zmniejszenie wydajności, bądź brak wiązania azotu atmosferycznego. Kompletny LPS chroni bakterie symbiotyczne wnikające do wnętrza komórek roślinnych oraz decyduje o właściwej organizacji i dojrzewaniu symbiosomów.

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Bacteria Involved in Nitrogen-Fixing Legume Symbiosis: Current Taxonomic Perspective

Cited by 21 publications

References 182 publications

Functional redundancy of multiple forest taxa along an elevational gradient: predicting the consequences of non‐random species loss

Functional redundancy of multiple forest taxa along an elevational gradient: predicting the consequences of non‐random species loss

PGPRs and nitrogen-fixing legumes: a perfect team for efficient Cd phytoremediation?

Struktura lipopolisacharydów rizobiowych i ich znaczenie w procesie symbiozy

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