scholarly journals Role of Nitrogen on Growth and Seed Yield of Soybean and a New Fertilization Technique to Promote Nitrogen Fixation and Seed Yield

10.5772/66743 ◽  
2017 ◽  
Author(s):  
Takuji Ohyama ◽  
Kaushal Tewari ◽  
Shinji Ishikawa ◽  
Kazuya Tanaka ◽  
Satoshi Kamiyama ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Seed Yield

scholarly journals Effects of Biofertilizer Produced from Bradyrhizobium and Streptomyces griseoflavus on Plant Growth, Nodulation, Nitrogen Fixation, Nutrient Uptake, and Seed Yield of Mung Bean, Cowpea, and Soybean

Agronomy ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 77 ◽  
Author(s):  
Aung Zaw Htwe ◽  
Seinn Moh Moh ◽  
Khin Myat Soe ◽  
Kyi Moe ◽  
Takeo Yamakawa
Keyword(s):  
Nitrogen Fixation ◽  
Plant Growth ◽  
Seed Yield ◽  
Mung Bean ◽  
Growth And Yield ◽  
Vegetable Crops ◽  
N Application ◽  
Npk Uptake ◽  
Phosphorus And Potassium ◽  
Leguminous Crops

The use of biofertilizers is important for sustainable agriculture, and the use of nodule bacteria and endophytic actinomycetes is an attractive way to enhance plant growth and yield. This study tested the effects of a biofertilizer produced from Bradyrhizobium strains and Streptomyces griseoflavus on leguminous, cereal, and vegetable crops. Nitrogen fixation was measured using the acetylene reduction assay. Under N-limited or N-supplemented conditions, the biofertilizer significantly promoted the shoot and root growth of mung bean, cowpea, and soybean compared with the control. Therefore, the biofertilizer used in this study was effective in mung bean, cowpea, and soybean regardless of N application. In this study, significant increments in plant growth, nodulation, nitrogen fixation, nitrogen, phosphorus, and potassium (NPK) uptake, and seed yield were found in mung beans and soybeans. Therefore, Bradyrhizobium japonicum SAY3-7 plus Bradyrhizobium elkanii BLY3-8 and Streptomyces griseoflavus are effective bacteria that can be used together as biofertilizer for the production of economically important leguminous crops, especially soybean and mung bean. The biofertilizer produced from Bradyrhizobium and S. griseoflavus P4 will be useful for both soybean and mung bean production.

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 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.

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 Nitrogen fixating ability of mungbean genotypes under different levels of nitrogen application

2016 ◽  
Vol 41 (1) ◽  
pp. 163-171 ◽  
Author(s):  
MA Razzaque ◽  
MM Haque ◽  
MA Karim ◽  
ARM Solaiman
Keyword(s):  
Nitrogen Fixation ◽  
Seed Yield ◽  
Biological Nitrogen Fixation ◽  
Yield Potential ◽  
Nitrogen Application ◽  
Culture Experiment ◽  
N Application ◽  
Biological Nitrogen ◽  
Different Levels ◽  
Pot Culture

A pot culture experiment was conducted at the Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur during kharif II, 2012 to evaluate the nodulation, biological nitrogen fixation and yield potential of genotypes of mungbean under varying levels of N application. There were 10 mungbean genotypes viz. IPSA 12, GK 27, IPSA 3, IPSA 5, ACC12890055, GK 63, ACC12890053, BU mug 4, BARI Mung 6 and Binamoog 5, each genotype treated with six levels of N (0, 20, 40, 60, 80 and 100 kg N ha-1) . Among the genotypes, the IPSA 12 at 40 kg N ha-1 produced the maximum number of nodules (14.54 plant-1) as well as the highest nitrogen fixation (2.684 mmol C2H4). This resulted in the highest seed yield (14.22 g plant-1). The genotype ACC12890053 recorded the lowest nodulation (6 plant-1), nitrogen fixation (1.134) and seed yield (7.33 g plant-1).Bangladesh J. Agril. Res. 41(1): 163-171, March 2016

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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