Role of Plants in Regulating the Methane Flux to the Atmosphere

Schütz, H.; Schröder, Peter; Rennenberg, Heinz

doi:10.1016/b978-0-12-639010-0.50007-8

Cited by 172 publications

(122 citation statements)

References 94 publications

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“…Such technical approach is suitable for microcosm experiments, but can hardly be used for field studies. Since rice plants allow the transport of O 2 from the atmosphere into the soil and of CH 4 from the soil into atmosphere via their gas vascular system and aerenchyma tissue in roots and shoots by a diffusional process (Nouchi et al, 1990;Schü tz et al, 1991), we inferred that transport of 13 C-labelled CH 4 from the atmosphere into the rhizosphere is also possible and that rhizospheric methanotrophs can be labelled in this way. The transport of 13 C-labelled CH 4 from the atmosphere into the rhizosphere was indeed operating as shown by the incorporation of 13 C into microbial PLFAs.…”

Section: Discussionmentioning

confidence: 99%

“…The total emission of CH 4 from Chinese rice fields was estimated to be in the range of 8.05 ± 3.69 Tg CH 4 per year, depending on the type of rice paddy field (Cai, 1997). In these ecosystems, the main CH 4 emission to the atmosphere occurs through the aerenchyma system of the rice plants (Nouchi et al, 1990;Schü tz et al, 1991). In turn, oxygen from the atmosphere is transported to the rice roots enabling aerobic and microaerophilic conditions in the rhizosphere .…”

Section: Introductionmentioning

confidence: 99%

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Applying stable isotope probing of phospholipid fatty acids and rRNA in a Chinese rice field to study activity and composition of the methanotrophic bacterial communities in situ

et al. 2008

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Methanotrophs in the rhizosphere play an important role in global climate change since they attenuate methane emission from rice field ecosystems into the atmosphere. Most of the CH 4 is emitted via transport through the plant gas vascular system. We used this transport for stable isotope probing (SIP) of the methanotrophs in the rhizosphere under field conditions and pulselabelled rice plants in a Chinese rice field with CH 4 (99% 13 C) for 7 days. The rate of 13 CH 4 loss rate during 13 C application was comparable to the CH 4 oxidation rate measured by the difluoromethane inhibition technique. The methanotrophic communities on the roots and in the rhizospheric soil were analyzed by terminal-restriction fragment length polymorphism (T-RFLP), cloning and sequencing of the particulate methane monooxygenase (pmoA) gene. Populations of type I methanotrophs were larger than those of type II. Both methane oxidation rates and composition of methanotrophic communities suggested that there was little difference between urea-fertilized and unfertilized fields. SIP of phospholipid fatty acids (PLFA-SIP) and rRNA (RNA-SIP) were used to analyze the metabolically active methanotrophic community in rhizospheric soil. PLFA of type I compared with type II methanotrophs was labelled more strongly with 13 C, reaching a maximum of 6.8 atom-%. T-RFLP analysis and cloning/sequencing of 16S rRNA genes showed that methanotrophs, especially of type I, were slightly enriched in the 'heavy' fractions. Our results indicate that CH 4 oxidation in the rice rhizosphere under in situ conditions is mainly due to type I methanotrophs.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Applying stable isotope probing of phospholipid fatty acids and rRNA in a Chinese rice field to study activity and composition of the methanotrophic bacterial communities in situ

et al. 2008

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“…This indicates that continuous flooding can promote conditions for CH4 formation, independent from the addition of organic matter into the soil. Consequently, CH4 emissions can arise from other organic matter sources such as roots and organic compounds supplied by root exudation and biomass litter, including leakages, secretions, mucilage, mucigel and lysates (Schütz et al, 1991;Aulakh et al, 2001). Compounds leaked from roots normally include carbohydrates, organic acids and amino acids (Vancura and Hovadik, 1965).…”

Section: Relationship Between Water and Straw Management Practices Onmentioning

confidence: 99%

Effect of Water and Straw Management Practices on Methane Emissions from Rice Fields: A Review Through a Meta-Analysis

Sanchís

Ferrer

Torres

et al. 2012

Environmental Engineering Science

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Running titleRice management practices and methane emissions 2 AbstractRice fields contribute substantially to global warming of the atmosphere through the emission of methane (CH4). This paper reviews the state-of-the-art of factors affecting CH4 emissions in rice fields, focusing on soil organic matter content and water management practices. It establishes a quantitative relationship between these factors based on a literature survey through a meta-analysis, useful to update the emission factors used to estimate CH4 in National Emission Inventories. Methane emissions in rice fields can be as much as 90% higher in continuously flooded rice fields compared with other water management systems, independent from straw addition. Water management systems which involve absence of flooding in total or part of the growing period such as midseason drainages, intermittent flooding and percolation control can reduce CH4 emissions substantially. Moreover, CH4 emissions increase with the amount of straw added until 7.7 t/ha for continuously flooded soils and until 5.1 t/ha for other water regimes. Above these levels, no further increase is produced with further addition of straw. As regards to rice straw management mitigation strategies, recommended practices are: composting rice straw, straw burning under controlled conditions, recollecting rice straw for biochar production, generation of energy, to be used as a substrate, or to obtain other by-products with added value. This review improves the understanding of the relationship between straw application rate, water regimes and CH4 emissions from rice fields to date. This relationship can help to select the most appropriate management practices to improve current mitigation strategies to reduce atmospheric CH4.

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“…Enhancement occurs through production and release of organic matter (Holzapfel-Pschorn et al, 1986;Schütz et al, 1991), and by transportation of CH 4 via molecular diffusion or convective flow through the internal gas spaces of the plants, thus bypassing oxidation in the anoxic/oxic interface (Shannon and White, 1994;Sorrell and Boon, 1994;Shannon et al, 1996). Many species of emergent macrophytes possess a convective flow mechanism which is many times more efficient in transporting gases than diffusion alone (Brix et al, 1992), and hence these species may accelerate the emission of CH 4 from wetlands (Brix et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

Methanogenesis and methane emissions: effects of water table, substrate type and presence of Phragmites australis

1999

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Role of Plants in Regulating the Methane Flux to the Atmosphere

Cited by 172 publications

References 94 publications

Applying stable isotope probing of phospholipid fatty acids and rRNA in a Chinese rice field to study activity and composition of the methanotrophic bacterial communities in situ

Applying stable isotope probing of phospholipid fatty acids and rRNA in a Chinese rice field to study activity and composition of the methanotrophic bacterial communities in situ

Effect of Water and Straw Management Practices on Methane Emissions from Rice Fields: A Review Through a Meta-Analysis

Methanogenesis and methane emissions: effects of water table, substrate type and presence of Phragmites australis

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