Ethylenediurea (EDU) protects inbred but not hybrid cultivars of rice from yield losses due to surface ozone

• Published in: Environmental science and pollution research international Vol. 28; no. 48; pp. 68946 - 68956
• Main Authors: Zhang, Guoyou, Kobayashi, Kazuhiko, Wu, Hengchao, Shang, Bo, Wu, Rongjun, Zhang, Zujian, Feng, Zhaozhong
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.12.2021; Springer Nature B.V
• Subjects: Agricultural production; Air Pollutants; Aquatic Pollution; Atmospheric Protection/Air Quality Control/Air Pollution; Crop yield; Cultivars; Dose-response effects; Earth and Environmental Science; Ecotoxicology; Environment; Environmental Chemistry; Environmental Health; Environmental science; Experiments; Genetic variability; Hybrids; Inbreeding; Oryza; Oxidative Stress; Ozone; Phenylurea Compounds; Plant protection; Plants; Research Article; Rice; Waste Water Technology; Water Management; Water Pollution Control; Ethylenediurea; Hybrid rice; Ozone; Crop yield; Rice; Cultivar
• ISSN: 0944-1344; 1614-7499
• DOI: 10.1007/s11356-021-15032-9

The rising concentration of ground-level ozone (O 3 ) reduces crop yield via increased oxidative stress. Application of ethylenediurea (EDU) protects plants from O 3 and could thereby serve as a means to estimate the crop yield losses due to ambient O 3 (AO 3 ). However, no study but a few exceptions has ever compared the yield loss estimates from EDU application with those from O 3 elevation experiments. Here, we estimated yield loss to AO 3 in rice cultivars across the 3 types, indica , japonica , and hybrid , by an EDU application in the field, and compared the yield losses with those estimated with dose-response relationships based on O 3 elevation experiments. Relative yield loss (RYL) in the EDU application was estimated at 16% across the rice types on an assumption of a 100% efficiency for protection of crop yield by EDU. This estimate of RYL was close to the 15% RYL estimated from the O 3 elevation experiments when a common sensitivity to O 3 is assumed across the cultivars. The rice yield loss due to AO 3 was thus consistent between the two approaches supporting the idea of EDU application for the yield loss estimation. When only hybrids are focused, however, the RYL from EDU application (16%) was much lower than the 34% RYL from the O 3 elevation experiments, which indicates only a 37% yield protection by EDU in the hybrid rice. The incomplete protection by EDU and its genetic variability indicates the need to quantify the efficiency of protection from AO 3 -induced yield loss as estimated with O 3 manipulating experiments.