Correlation between Methane (CH4) Emissions and Root Aerenchyma of Rice Varieties

Kim, Woojae; Bui, Liem T.; Chun, Jae-Buhm; McClung, Anna M.; Barnaby, Jinyoung Y.

doi:10.9787/pbb.2018.6.4.381

Cited by 29 publications

(17 citation statements)

References 41 publications

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“…Moreover, the EU Common Agricultural Policy endorsed a progressive reduction of the subsidies granted to rice growers aiming at more equable income support to farmers regardless of the cultivated crops (European Parliament, 2010). Rice cultivation in Europe is also in the spotlight for ecological issues like groundwater pollution, high greenhouse gases emissions (mostly methane, W. Kim et al, 2018), and land degradation (Blengini and Busto, 2009), although it provides socio-economic benefits like water catchment (e.g. rice paddies used as floodplains) and the creation of habitats for waterbirds in lowland areas like, e.g., in the Italian Po valley (Fasola et al, 1996;Longoni, 2010).…”

Section: Introductionmentioning

confidence: 99%

Phenotypic variability in Italian rice germplasm

Mongiano

Titone

Pagnoncelli

et al. 2020

European Journal of Agronomy

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Plant breeding is one of the key strategies for further enhancement of crop yields; however, effective breeding strategies require phenotypic characterisation of the available germplasm. This study sought to characterise the phenotypic expression of fourteen crop traits related to phenology, plant architecture, and yield in a panel of 40 cultivars selected to represent the phenotypic variability present in Italian rice germplasm during a two-season field experiment. The observed range of phenotypic variation was high for many traits (coefficients of variation ranging from 5.9% to 45.4%) including yield (mean: 6.47 t ha-1 ; CV: 15.4%; min: 2.19 t ha-1 ; max: 8.95 t ha-1), and multiple strong associations emerged in all the analysed traits. Cluster analysis extracted three groups of genotypes characterised by alternative yield strategies, i.e. "high-tillering", "early maturing", and "increased source-sink". Our findings highlight that rice yield decrease when one strategy is overemphasised. In contrast, the highest-yielding genotypes have a balanced ratio between sink and source organs, along with a proportional duration of vegetative and reproductive phases. This study depicts the phenotypic variability in Italian rice cultivars and proposes a novel classification based on yield-related traits which could be of use in multiple rice breeding applications.

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Section: Introductionmentioning

confidence: 99%

Phenotypic variability in Italian rice germplasm

Mongiano

Titone

Pagnoncelli

et al. 2020

European Journal of Agronomy

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“…Increasing CH 4 flows were observed during the rice tillering period ( Figure 1B). Increase in the number of tillers resulted in a greater CH 4 transport capacity as a function of the greater density and amount of aerenchyme (KIM et al, 2018). the variety SCS 114 andosan is characterized by presenting high tillering, which could have contributed to the elevated CH 4 flows in this stage.…”

Section: Lima Et Almentioning

confidence: 97%

Methane emission from a flooded rice field under pre-germinated system

et al. 2019

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Local greenhouse gas flow measurement studies have been encouraged at a global level as a subsidy for national and state inventories. This study aimed to evaluate the seasonal methane emission during the 2008/2009 harvest, from an irrigated rice plantation, under pre-germinated system, in the municipality of Tremembé, State of São Paulo, using the static chamber technique and gas chromatography. The study showed high seasonal emission of methane (CH4) for the studied area, probably due to the long flooding period. It was estimated the CH4 emission factor (6.2 kg CH4 ha-1 dia-1), the partial global warming potential (pGWP, 26.2 Mg CO2eq growing season-1 ha-1) and the yield-scaled pGWP (YpGWP, 3.9 kg CO2eq kg grain).

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“…The CH4 flux from rice varieties is also determined by the total biomass and area of root aerenchyma. The transport of CH4 and oxygen through the aerenchyma plays a role in supplying substrate to methanogenic bacteria and methanotrophs through root exudates (Kim, Bui, Chun, McClung, & Barnaby, 2018). Figure 3 shows that CH4 flux correlated significantly with the plant biomass at the panicle initiation growth stage, which is described by the equation Y = 0.015X2 -0.126X + 74.209 (R 2 = 0.5667; n = 36; Y = CH4 flux and X = plant biomass).…”

Section: Discussionmentioning

confidence: 98%

Methane flux from high-yielding Inpari rice varieties in Central Java, Indonesia

Wihardjaka

Yulianingsih

Yulianingrum

2020

Sains Tanah J. Soil Sci. Agroclimatology

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Rice cultivation is a source of greenhouse gas emissions, particularly methane (CH4). One of the factors that affect CH4 emissions from rice fields is rice cultivar. In this study, a field experiment was conducted to determine CH4 emissions from various high-yielding inbred varieties and the relationship between CH4 emissions and rice growth parameters. The field experiment was conducted in Jaken, Pati Regency, Central Java province, during the wet season of 2014/2015. The experiment was arranged using a randomized block design with three replications and several cultivar treatments (Inpari 13, 18, 19, 20, 23, 24, 29, 30, 31, 32, and 33, with Ciherang as the comparison cultivar). The data collected includes CH4 flux, plant height, tiller number, biomass, grain yield, and root aerenchyma area. The CH4 flux was measured at several critical growth stages. The Inpari 24, Inpari 13, and Inpari 19 demonstrated CH4 emissions reduced by as much as 36.1%, 32.8%, and 21.3%, respectively, compared to Ciherang. The Inpari 13 and Inpari 24 varieties had significantly lower emission indices than Ciherang and the other Inpari varieties, with 17 and 20 g CH4 per 1 kg grain yield, respectively. CH4 flux was found to correlate significantly with tiller number per hill, total biomass, and root aerenchyma area at the panicle initiation growth stage.

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Correlation between Methane (CH₄) Emissions and Root Aerenchyma of Rice Varieties

Cited by 29 publications

References 41 publications

Phenotypic variability in Italian rice germplasm

Phenotypic variability in Italian rice germplasm

Methane emission from a flooded rice field under pre-germinated system

Methane flux from high-yielding Inpari rice varieties in Central Java, Indonesia

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