Journal article

Increased carbon loss via root respiration and impaired root morphology under free-air ozone enrichment adversely affect rice (Oryza sativa l.) production

TJ Kou, LK Lai, SK Lam, D Chen, J He

Experimental Agriculture | Cambridge University Press (CUP) | Published : 2019

Abstract

© 2018 Cambridge University Press. The increasing tropospheric ozone concentration [O3] strongly affects plant growth. However, the response of belowground processes in rice (Oryza sativa L.) systems to higher O3 is not well understood. The grain production, belowground biomass partitioning, root morphology and activity of rice (cv. Shanyou 63) were investigated in a free-air O3 enrichment platform at four key growth stages. Elevated O3 (EO3, 50% above the ambient O3) significantly decreased the grain yield and total biomass at the grain milky mature stage, root biomass at the tillering stage and root to shoot ratios (RRS) at the flowering and grain filling stages. The effects of EO3 on root..

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Grants

Awarded by National Natural Science Foundation of China


Awarded by Innovation Team Foundation of Henan University of Science and Technology


Awarded by Open Research Fund Program of State Key Laboratory of Soil and Sustainable Agriculture


Funding Acknowledgements

This work was supported by the National Natural Science Foundation of China (grant no. 41003030), the Innovation Team Foundation of Henan University of Science and Technology (grant no. 2015TTD002), Open Research Fund Program of State Key Laboratory of Soil and Sustainable Agriculture (grant no. Y052010030).