&lt;b&gt;Rhizobial diversity from stem and root nodules of &lt;i&gt;Discolobium&lt;/i&gt; and &lt;i&gt;Aeschynomene&lt;/i&gt;

Martins, Claudia Miranda; Borges, Wardsson Lustrino; Júnior, José de Souza Costa; Rumjanek, Norma Gouvêa

doi:10.4025/actasciagron.v37i2.19565

Cited by 2 publications

(2 citation statements)

References 21 publications

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“…Rarefaction curves was not stabilized by the isolation of 73 bradyrhizobial isolates which is a common result for evaluation of rhizobial diversity in tropical soils (Jesus et al 2005;Martins et al 2015a;Borges et al 2016). The determination of the stabilization point in the rarefaction curves are, generally, subjective (Magurran 1988).…”

Section: Discussionmentioning

confidence: 99%

Are Cowpea-Nodulating Bradyrhizobial Communities Influenced by Biochar Amendments in Soils? Genetic Diversity and Symbiotic Effectiveness Assessment of Two Agricultural Soils of Brazilian Drylands

Oliveira

Sena

Nascimento

et al. 2019

J Soil Sci Plant Nutr

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The objective of this study was to evaluate the influence of biochar amendment on the bacterial genetic diversity and symbiosis in cowpea-nodulating rhizobial communities in two agricultural soils of Brazilian drylands. Vertisol and Ultisol surface layer soil samples were collected in the Brazilian semiarid region. The soils were mixed with biochar and cowpea seeds (BRS Marataoã) and sown in pots. Forty-five days after plant emergence, the nodule bacteria were isolated. The genetic variability of the nodule bacteria was evaluated by means of restriction fragment length polymorphism of 16S-23S rRNA intergenic spacer region (IGS-RFLP), and those that shared identical IGS-RFLP profiles were fingerprinted by BOX-PCR. By selecting of representative isolates in the genetic clusters, 27 bacteria were identified by 16S-23S IGS sequencing and symbiotically assessed. The IGS-RFLP dendrogram of the 73 isolates had 20 clusters; the multivariate correspondence analysis grouped both Vertisol treatments, and the Ultisol treatments were placed far away in the biplot. Ultisol showed higher bradyrhizobial diversity than the Vertisol. The fingerprinting indicated the presence of only three clonal colonies, showing high intraspecific diversity. The 16S-23S IGS sequences indicated the prevalence of bacteria related to Bradyrhizobium guangxiense in the Vertisol and Bradyrhizobium zhanjiangense in the Ultisol, in addition to the presence of three putative Microvirga spp. in the Ultisol. The symbiotic efficiency of 22 out of 27 bacteria was comparable with that of the inoculant strain Bradyrhizobium yuanmingense BR 3267. The genetic diversity of the cowpea-nodulating bradyrhizobia was not primarily affected by the biochar application in two agricultural soils of Brazilian drylands. Both soils harbored symbiotically efficient bacteria, without the influence of biochar amendment .

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Section: Discussionmentioning

confidence: 99%

Are Cowpea-Nodulating Bradyrhizobial Communities Influenced by Biochar Amendments in Soils? Genetic Diversity and Symbiotic Effectiveness Assessment of Two Agricultural Soils of Brazilian Drylands

Oliveira

Sena

Nascimento

et al. 2019

J Soil Sci Plant Nutr

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“…Plant species that exhibit stem nodulation are typically tropical or subtropical and grow in wetlands, rivers or lake margins, and belong to Aeschynomene, Sesbania, Neptunia and Discolobium genera [50]. Along with the formation of nodules, some species develop a large number of parenchymal cells, which facilitates the entry of sufficient oxygen for different metabolic functions [51].…”

Section: Stemsmentioning

confidence: 99%

Morphoanatomical Characteristics in Riparian Vegetation and Its Adaptative Value

García¹,

Jáuregui²

2021

River Basin Management - Sustainability Issues and Planning Strategies

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Riparian vegetation comprises plant communities that grow laterally to rivers and streams. They have multiple adaptations, which allows them to persist in these variable and dynamic habitats. This chapter focuses on the morphological and anatomical adaptations of vegetative organs, due to the fact that they are more vulnerable to environmental changes that occur in riparian ecosystems. We also discuss some dispersal mechanisms in riparian species exposed to flooding conditions. Most morphoanatomical adaptations in riparian plants reflect constraints imposed by long periods of waterlogging or complete submergence, as well as the high diversity of strategies that species have developed in order to cope with flooding. Furthermore, riparian ecosystems are being impacted by an increasing artificialization of rivers and banks with losses, or profound changes, in the natural riparian vegetation a problem that will increase with the ongoing climate change, and which must be contained. In order to reduce the vulnerability of these ecosystems, a deeper knowledge of the morphoanatomical attributes that make possible the successful adaptation of riparian flora is necessary so as to implement appropriate measures for the rehabilitation and sustainability of riparian ecosystems.

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<b>Rhizobial diversity from stem and root nodules of <i>Discolobium</i> and <i>Aeschynomene</i>

Abstract: ABSTRACT. Among the genera that exhibit stem nodulation, Aeschynomene and Discolobium are found in the Pantanal Mato-grossense (wetlands in the state of Mato Grosso, Brazil

Cited by 2 publications

References 21 publications

Are Cowpea-Nodulating Bradyrhizobial Communities Influenced by Biochar Amendments in Soils? Genetic Diversity and Symbiotic Effectiveness Assessment of Two Agricultural Soils of Brazilian Drylands

Are Cowpea-Nodulating Bradyrhizobial Communities Influenced by Biochar Amendments in Soils? Genetic Diversity and Symbiotic Effectiveness Assessment of Two Agricultural Soils of Brazilian Drylands

Morphoanatomical Characteristics in Riparian Vegetation and Its Adaptative Value

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