scholarly journals Sugar enrichment provides evidence for a role of nitrogen fixation in coral bleaching

2017 ◽  
Vol 23 (9) ◽  
pp. 3838-3848 ◽  
Author(s):  
Claudia Pogoreutz ◽  
Nils Rädecker ◽  
Anny Cárdenas ◽  
Astrid Gärdes ◽  
Christian R. Voolstra ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Coral Bleaching

scholarly journals The role of clouds in coral bleaching events over the Great Barrier Reef

2021 ◽  
Author(s):  
Wenhui ZHAO ◽  
Yi HUANG ◽  
Steven T Siems ◽  
Michael J Manton
Keyword(s):  
Great Barrier Reef ◽  
Coral Bleaching ◽  
Barrier Reef

The Role of Dryas Drummondii in Vegetation Development Following Ice Recession at Glacier Bay, Alaska, with Special Reference to Its Nitrogen Fixation by Root Nodules

1967 ◽  
Vol 55 (3) ◽  
pp. 793 ◽  
Author(s):  
D. B. Lawrence ◽  
R. E. Schoenike ◽  
A. Quispel ◽  
G. Bond
Keyword(s):  
Nitrogen Fixation ◽  
Special Reference ◽  
Root Nodules ◽  
Vegetation Development ◽  
Glacier Bay

scholarly journals The Role of Nitrogen Fixation in Cyanobacterial Bloom Toxicity in a Temperate, Eutrophic Lake

PLoS ONE ◽  
2013 ◽  
Vol 8 (2) ◽  
pp. e56103 ◽  
Author(s):  
Lucas J. Beversdorf ◽  
Todd R. Miller ◽  
Katherine D. McMahon
Keyword(s):  
Nitrogen Fixation ◽  
Cyanobacterial Bloom ◽  
Eutrophic Lake

scholarly journals Complex interactions in legume/cereal intercropping system: role of root exudates in root-to-root communication

2017 ◽  
Author(s):  
Yinshan Jiao ◽  
Entao Wang ◽  
Wenfeng Chen ◽  
Donald L. Smith
Keyword(s):  
Nitrogen Fixation ◽  
Root Exudates ◽  
Faba Bean ◽  
The Novel ◽  
Practical Application ◽  
Corn Root ◽  
Complex Interactions ◽  
Root Interactions ◽  
Ecological Principles

Dear Editor,Legume/cereal intercropping systems have been regarded as the practical application of basic ecological principles such as diversity, competition and facilitation. In a recent PNAS paper, Li et al. (1) describe the novel finding that maize exudates promote faba bean nodulation and nitrogen fixation by upregulating genes involved in (iso)flavonoids synthesis (chalcone–flavanone isomerase) within faba bean, resulting in production of more genistein, a legume-to-rhizobia signal during establishment of the faba bean N2–fixing symbiosis. Although we salute the authors’ methodological efforts, there is another mechanism that could be responsible for the effect of corn root exudates on faba been nitrogen fixation observed in this article (1). The authors may misunderstand their data and the signalling role of maize exudates, thus got a defective model for the root interactions between faba bean and maize.

scholarly journals Novel Reiterated Fnr-Type Proteins Control the Production of the Symbiotic Terminal Oxidase cbb3 in Rhizobium etli CFN42

2007 ◽  
Vol 20 (10) ◽  
pp. 1241-1249 ◽  
Author(s):  
Manuel J. Granados-Baeza ◽  
Nicolás Gómez-Hernández ◽  
Yolanda Mora ◽  
María J. Delgado ◽  
David Romero ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Oxygen Affinity ◽  
Structural Similarity ◽  
Transcriptional Regulators ◽  
Terminal Oxidase ◽  
Nitrogen Fixing ◽  
Rhizobium Etli ◽  
High Oxygen Affinity ◽  
Key Genes

Symbiotic nitrogen-fixing bacteria express a terminal oxidase with a high oxygen affinity, the cbb3-type oxidase encoded by the fixNOQP operon. Previously, we have shown that, in Rhizobium etli CFN42, the repeated fixNOQP operons (fixNOQPd and fixNOQPf) have a differential role in nitrogen fixation. Only the fixNOQPd operon is required for the establishment of an effective symbiosis; microaerobic induction of this operon is under the control of at least three transcriptional regulators, FixKf, FnrNd, and FnrNchr, belonging to the Crp/Fnr family. In this work, we describe two novel Crp/Fnr-type transcriptional regulators (StoRd and StoRf, symbiotic terminal oxidase regulators) that play differential roles in the control of key genes for nitrogen fixation. Mutations either in stoRd or stoRf enhance the microaerobic expression of both fixNOQP reiterations, increasing also the synthesis of the cbb3-type oxidase in nodules. Despite their structural similarity, a differential role of these genes was also revealed, since a mutation in stoRd but not in stoRf enhanced both the expression of fixKf and the nitrogen-fixing capacity of R. etli CFN42.

scholarly journals Nitrogen fixation and bioenergetics: the role of ATP in nitrogenase catalysis

FEBS Letters ◽  
1979 ◽  
Vol 98 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Torbjørn Ljones
Keyword(s):  
Nitrogen Fixation

A Possible Role of Flavodoxin in Nitrogen Fixation in Heterocysts from Anabaena

1991 ◽  
pp. 431-436 ◽  
Author(s):  
M. C. Lázaro ◽  
M. F. Fillat ◽  
C. Gómez-Moreno ◽  
M. L. Peleato
Keyword(s):  
Nitrogen Fixation

scholarly journals The Significance of Flavonoids in the Process of Biological Nitrogen Fixation

2020 ◽  
Vol 21 (16) ◽  
pp. 5926
Author(s):  
Wei Dong ◽  
Yuguang Song
Keyword(s):  
Nitrogen Fixation ◽  
Plant Species ◽  
Biological Nitrogen Fixation ◽  
Molecular Basis ◽  
Phenylpropanoid Pathway ◽  
Rhizobium Spp ◽  
Microbial Symbionts ◽  
Biological Nitrogen ◽  
Do So

Nitrogen is essential for the growth of plants. The ability of some plant species to obtain all or part of their requirement for nitrogen by interacting with microbial symbionts has conferred a major competitive advantage over those plants unable to do so. The function of certain flavonoids (a group of secondary metabolites produced by the plant phenylpropanoid pathway) within the process of biological nitrogen fixation carried out by Rhizobium spp. has been thoroughly researched. However, their significance to biological nitrogen fixation carried out during the actinorhizal and arbuscular mycorrhiza–Rhizobium–legume interaction remains unclear. This review catalogs and contextualizes the role of flavonoids in the three major types of root endosymbiosis responsible for biological nitrogen fixation. The importance of gaining an understanding of the molecular basis of endosymbiosis signaling, as well as the potential of and challenges facing modifying flavonoids either quantitatively and/or qualitatively are discussed, along with proposed strategies for both optimizing the process of nodulation and widening the plant species base, which can support nodulation.

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