Mitigation of nitrous oxide emissions from soils by Bradyrhizobium japonicum inoculation

Itakura, Manabu; Uchida, Yoshitaka; Akiyama, Hiroko; Hoshino, Yuko Takada; Shimomura, Yumi; Morimoto, Sho; Tago, Kanako; Wang, Yong; Hayakawa, Chihiro; Uetake, Yusuke; Sánchez, Cristina; Eda, Shima; Hayatsu, Masahito; Minamisawa, Kiwamu

doi:10.1038/nclimate1734

Cited by 124 publications

(132 citation statements)

References 24 publications

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“…A recent study focusing on the biotechnology has suggested that the use of the enzyme that reduces N 2 O has a crucial role in reducing atmospheric N 2 O levels (Richardson et al 2009). A new method for mitigation of postharvest N 2 O emissions from soybean ecosystems has recently been proposed: inoculation of N 2 O-reducing bacteria into soybean roots (Itakura et al 2013). This method was developed based on the fact that some strains of Bradyrhizobium japonicum (Kirchner 1896) Jordan 1982 (N-fixing bacteria that form nodules on soybean roots) have the ability to denitrify to the last step of the denitrification process (N 2 O to N 2 ), whereas other strains produce N 2 O as an end product (Asakawa 1993 (2006a) conducted an incubation study using soybean roots inoculated with two types of B. japonicum strains: one with nosZ (nosZ+ strain) and another without nosZ (nosZ deletion mutant).…”

Section: A New Methods For Mitigation Of Postharvest N 2 O Emissions Fmentioning

confidence: 99%

“…Both studies were conducted on andosols where > 95% of the wild-type B. japonicum strains were without nosZ. Itakura et al (2013) also conducted a lysimeter study on a fluvisol where wild-type B. japonicum strains were mostly inoculated with nosZ+. However, the reduction in postharvest N 2 O emissions by inoculation of nosZ++ strains on a nosZ+-dominated fluvisol, as measured by lysimeter, was not significant.…”

Section: A New Methods For Mitigation Of Postharvest N 2 O Emissions Fmentioning

confidence: 99%

“…A pure culture study showed that N 2 O reduction by nosZ++ strains occurred significantly faster when compared with a wild-type strain of B. japonicum with nosZ (nosZ+ strain). Itakura et al (2013) also conducted lysimeter and farm-scale field studies to test the effectiveness of the inoculation of nosZ++ strains on a large scale in terms of the mitigation of postharvest N 2 O emissions from soybean ecosystems. The results showed that inoculation of the nosZ++ strain reduced postharvest N 2 O emissions from soybean ecosystems by 43 and 54% for the lysimeter and farm-scale field studies, respectively.…”

Section: A New Methods For Mitigation Of Postharvest N 2 O Emissions Fmentioning

confidence: 99%

“…At the field level, there were few studies focused on the nosZ genes and N 2 O emissions in soybean ecosystems. However, one field study concluded that when the proportion of wild type N-fixing bacteria lacking the nosZ genes was high (> 98%), the inoculation of N-fixing bacteria with the nosZ genes resulted in the reduction of soil N 2 O emissions (discussed in details in the next section; Itakura et al 2013).…”

Section: Presence Of the Genes Encoding The Nitrous Oxide Reductase (mentioning

confidence: 99%

“…In addition, a new biological method has recently been developed to mitigate soil N 2 O emissions by the inoculation of N-fixing bacteria (Itakura et al 2013). Studies on decomposition of legume crops and consequent N 2 O emissions were briefly reviewed by Jensen et al (2012), but only a part of the review focused on the use of legumes for mitigation of climate change.…”

Section: Introductionmentioning

confidence: 99%

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Mitigation of postharvest nitrous oxide emissions from soybean ecosystems: a review

Uchida

Akiyama

2013

Soil Science and Plant Nutrition

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In this review, the current knowledge of nitrous oxide (N 2 O) emissions from soybean (Glycine max (L.) Merr.) ecosystems, particularly on postharvest N 2 O emissions, is summarized and controlling factors of postharvest N 2 O emissions from soybean ecosystems are discussed. A new biological method to mitigate N 2 O emission is also presented. The latest (2006) guidelines of the Intergovernmental Panel on Climate Change (IPCC) concluded that N 2 O emissions derived directly from biological nitrogen (N) fixation were not significant in legume crop ecosystems. The default N 2 O emission factor from biological N fixation was revised to zero, whereas the default N 2 O emission factor for the decomposition of legume crop residues (postharvest N 2 O emissions) was the same as that for nonlegume crop residues (1%). From previously measured field data, the percentage of N in soybean residue emitted as N 2 O after harvest was calculated to determine emission factors. Values ranged from 0.0-10.0% (average 1.3% ± 2.7%, median: 0.2%), indicating relatively low emission factors. The average emission factor calculated for N 2 O emissions from N in soybean residues was slightly higher than the default emission factor for N in crop residue specified in the guidelines. However, the volume of field-measured postharvest N 2 O emissions in soybean ecosystems is low compared with data for N 2 O emissions during the crop growing season. Previous field-measured data demonstrated that N 2 O emissions often peaked sharply immediately after the harvest. However, values for N 2 O fluxes in the currently available field data were determined on a weekly or monthly basis. This large time gap between samplings may have resulted in underestimation of postharvest N 2 O emissions in soybean ecosystems. More detailed field studies on postharvest N 2 O emissions from soybean ecosystems are needed. Nodule decomposition is the major source of postharvest N 2 O emissions in soybean ecosystems. A new microbiological method was recently developed to mitigate postharvest N 2 O emissions from soybean ecosystems utilizing N-fixing bacteria with increased N 2 O-reducing activity (increased expression of nosZ). This approach may potentially be applied to other leguminous crops and non-legume ecosystems. Ongoing research on the relationships between soil N 2 O emissions and nosZ may reveal a new method for N 2 O mitigation in the future.

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Section: A New Methods For Mitigation Of Postharvest N 2 O Emissions Fmentioning

confidence: 99%

Section: A New Methods For Mitigation Of Postharvest N 2 O Emissions Fmentioning

confidence: 99%

Section: A New Methods For Mitigation Of Postharvest N 2 O Emissions Fmentioning

confidence: 99%

Section: Presence Of the Genes Encoding The Nitrous Oxide Reductase (mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mitigation of postharvest nitrous oxide emissions from soybean ecosystems: a review

Uchida

Akiyama

2013

Soil Science and Plant Nutrition

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References

2019

The Science of Climate Change

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Antimicrobial Resistance, Food Systems and Climate Change

Mohsin

Shad

Ali

et al. 2020

Sustainable Agriculture Reviews

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Mitigation of nitrous oxide emissions from soils by Bradyrhizobium japonicum inoculation

Cited by 124 publications

References 24 publications

Mitigation of postharvest nitrous oxide emissions from soybean ecosystems: a review

Mitigation of postharvest nitrous oxide emissions from soybean ecosystems: a review

References

Antimicrobial Resistance, Food Systems and Climate Change

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