Role of symbiotic nitrogen fixation in increasing photosynthetic productivity of soybean

Тильба, В А; Sinegovskaya, V. Т.

doi:10.3103/s1068367412050199

Cited by 6 publications

(3 citation statements)

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“…Application of sodium humate to soybean inoculated with Bradyrhizobium in the presence of molybdate improved soybean yield, nodule number, and biological nitrogen fixation (Til'ba and Sinegovskaya, 2013). The greater efficiency of nodulation in the presence of HPs may be linked to the ability of these substances to regulate quorum sensing in rhizobia.…”

Section: Microbial Inoculantsmentioning

confidence: 96%

Impacts of humic-based products on the microbial community structure and functions toward sustainable agriculture

Lumactud

Gorim

Thilakarathna

2022

Front. Sustain. Food Syst.

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Humic-based products (HPs) are carbon-rich organic amendments in the forms of extracted humic substances from manure, compost, and raw and extracted forms of lignites, coals and peats. HPs are widely used in agriculture and have beneficial effects on plants. While the agronomic benefits of HPs have been widely reported, information on their impact on the soil microbial community composition and functions is lacking, despite claims made by companies of humic substances as biostimulants. In this review, we explored published research on microbial responses with HPs application in an agronomic context. Although research data are sparse, current results suggest indirect impacts of HPs on microbial community composition and activities. HPs application changes the physico-chemical properties of the soil and influence root exudation, which in turn impact the microbial structure and function of the soil and rhizosphere. Application of HPs to the soil as biostimulants seemed to favor plant/soil beneficial bacterial community composition. HPs impacts on microbial activities that influence soil biogeochemical functioning remain unclear; existing data are also inconsistent and contradictory. The structural properties of HPs caused inconsistencies in their reported impacts on soil properties and plants. The sources of HPs and forms (whether extracted or raw), soil type, geographic location, crop species, and management strategies, among others, affect microbial communities affecting HPs efficacy as biostimulants. A more holistic approach to research encompassing multiple influential factors and leveraging the next-generation sequencing technology is needed to unravel the impacts of HPs on the soil microbiome. Addressing these knowledge gaps facilitates sustainable and efficient use of HPs as organic agricultural amendments reducing the use of chemical fertilizers.

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Section: Microbial Inoculantsmentioning

confidence: 96%

Impacts of humic-based products on the microbial community structure and functions toward sustainable agriculture

Lumactud

Gorim

Thilakarathna

2022

Front. Sustain. Food Syst.

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“…However, the mechanisms underlying such priming effects are much more complex than commonly believed. Tilba and Sinegovskaya (2012) reported that priming of soybean seeds (under field conditions) with rhizobia, sodium humate, ammonium molybdate, and sodium humate leaf spraying, significantly increased the efficiency of nitrogen fixation and the number of nodules, resulting in an increase in crop yield of up to 22%, compared with the control. Dong et al (2009) reported that the application of HAs increased the yield of soybean by up to 26.4% and enhanced bacterial diversity, which was further promoted by urea application in the soil.…”

Section: Introductionmentioning

confidence: 99%

Humic Substances: Determining Potential Molecular Regulatory Processes in Plants

et al. 2018

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Humic substances (HSs) have considerable effects on soil fertility and crop productivity owing to their unique physiochemical and biochemical properties, and play a vital role in establishing biotic and abiotic interactions within the plant rhizosphere. A comprehensive understanding of the mode of action and tissue distribution of HS is, however, required, as this knowledge could be useful for devising advanced rhizospheric management practices. These substances trigger various molecular processes in plant cells, and can strengthen the plant’s tolerance to various kinds of abiotic stresses. HS manifest their effects in cells through genetic, post-transcriptional, and post-translational modifications of signaling entities that trigger different molecular, biochemical, and physiological processes. Understanding of such fundamental mechanisms will provide a better perspective for defining the cues and signaling crosstalk of HS that mediate various metabolic and hormonal networks operating in plant systems. Various regulatory activities and distribution strategies of HS have been discussed in this review.

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“…However, the effects of humic materials on symbiotic nitrogen fixation had been rarely investigated except in the reports of Tan and Tantiwiramanond 15 that soil humic and fulvic acids extracted by 0.1 M NaOH could increase the plant dry weight and nodule mass but not the nodule number of soybeans and peanuts under greenhouse conditions. In addition, Til’ba and Sinegovskaya 16 proved in a field experiment that seed coating with sodium humate, rhizobia, ammonium molybdate and leaf spraying with sodium humate increased the nodule number and nitrogen-fixing efficiency of soybean, and the yield hence increased by 22% compared with the control. Even though, the exact role of humic materials in symbiotic nitrogen fixation and its mechanism were still unclear.…”

mentioning

confidence: 99%

Nodulation Characterization and Proteomic Profiling of Bradyrhizobium liaoningense CCBAU05525 in Response to Water-Soluble Humic Materials

Gao

Jiang

et al. 2015

Sci Rep

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The lignite biodegradation procedure to produce water-soluble humic materials (WSHM) with a Penicillium stain was established by previous studies in our laboratory. This study researched the effects of WSHM on the growth of Bradyrhizobium liaoningense CCBAU05525 and its nodulation on soybean. Results showed that WSHM enhanced the cell density of CCBAU05525 in culture, and increased the nodule number, nodule fresh weight and nitrogenase activity of the inoculated soybean plants. Then the chemical compounds of WSHM were analyzed and flavonoid analogues were identified in WSHM through tetramethyl ammonium hydroxide (TMAH)-py-GC/MS analysis. Protein expression profiles and nod gene expression of CCBAU05525 in response to WSHM or genistein were compared to illustrate the working mechanism of WSHM. The differently expressed proteins in response to WSHM were involved in nitrogen and carbon metabolism, nucleic acid metabolism, signaling, energy production and some transmembrane transports. WSHM was found more effective than genistein in inducing the nod gene expression. These results demonstrated that WSHM stimulated cell metabolism and nutrient transport, which resulted in increased cell density of CCBAU05525 and prepared the bacteria for better bacteroid development. Furthermore, WSHM had similar but superior functions to flavone in inducing nod gene and nitrogen fixation related proteins expression in CCBAU05525.

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Role of symbiotic nitrogen fixation in increasing photosynthetic productivity of soybean

Cited by 6 publications

References 0 publications

Impacts of humic-based products on the microbial community structure and functions toward sustainable agriculture

Impacts of humic-based products on the microbial community structure and functions toward sustainable agriculture

Humic Substances: Determining Potential Molecular Regulatory Processes in Plants

Nodulation Characterization and Proteomic Profiling of Bradyrhizobium liaoningense CCBAU05525 in Response to Water-Soluble Humic Materials

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