首页|Methane Emission from Rice Fields:Necessity for Molecular Approach for Mitigation

Methane Emission from Rice Fields:Necessity for Molecular Approach for Mitigation

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Anthropogenic methane emissions are a leading cause of the increase in global average temperatures,often referred to as global warming.Flooded soils play a significant role in methane production,where the anaerobic conditions promote the production of methane by methanogenic microorganisms.Rice fields contribute a considerable portion of agricultural methane emissions,as rice plants provide both factors that enhance and limit methane production.Rice plants harbor both methane-producing and methane-oxidizing microorganisms.Exudates from rice roots provide source for methane production,while oxygen delivered from the root aerenchyma enhances methane oxidation.Studies have shown that the diversity of these microorganisms depends on rice cultivars with some genes characterized as harboring specific groups of microorganisms related to methane emissions.However,there is still a need for research to determine the balance between methane production and oxidation,as rice plants possess the ability to regulate net methane production.Various agronomical practices,such as fertilizer and water management,have been employed to mitigate methane emissions.Nevertheless,studies correlating agronomic and chemical management of methane with productivity are limited.Moreover,evidences for breeding low-methane-emitting rice varieties are scattered largely due to the absence of coordinated breeding programs.Research has indicated that phenotypic characteristics,such as root biomass,shoot architecture,and aerenchyma,are highly correlated with methane emissions.This review discusses available studies that involve the correlation between plant characteristics and methane emissions.It emphasizes the necessity and importance of breeding low-methane-emitting rice varieties in addition to existing agronomic,biological,and chemical practices.The review also delves into the ideal phenotypic and physiological characteristics of low-methane-emitting rice and potential breeding techniques,drawing from studies conducted with diverse varieties,mutants,and transgenic plants.

methane emissionrice breedingaerenchymagreenhouse gasradial oxygen loss

Sujeevan RAJENDRAN、Hyeonseo PARK、Jiyoung KIM、Soon Ju PARK、Dongjin SHIN、Jong-Hee LEE、Young Hun SONG、Nam-Chon PAEK、Chul Min KIM

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Department of Horticulture Industry,Wonkwang University,Iksan 54538,Korea

Plant Molecular Biology and Biotechnology Research Center,Gyeongsang National University,Jinju 52828,Korea

Department of Southern Area Crop Science,National Institute of Crop Science,Miryang 50424,Korea

Department of Agricultural Biotechnology,Seoul National University,Seoul 08826,Korea

Department of Plant Science,Plant Genomics and Breeding Institute,Research Institute of Agriculture and Life Sciences,Seoul National University,Seoul 08826,Korea

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Improvement of Green Rice Plant Type Using Genetic Information Program,Rural Development Administration,Korea

PJ01699202

2024

10.1016/j.rsci.2023.10.003

水稻科学(英文版)
中国水稻研究所

水稻科学(英文版)

CSTPCD
影响因子：0.269
ISSN：1672-6308
年,卷(期)：2024.31(2)
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