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- W2735166246 abstract "Abstract Rice is the foremost staple food in India, safeguarding the food security of the country. Rising levels of atmospheric CO 2 concentration affect water productivity and antioxidant enzyme activities of rice, yet the interactive effects of elevated CO 2 (ECO 2 ) and water deficit stress (WDS) on rice has remained unclear. The present experiment was conducted for two years under Open Top Chambers (OTCs) to elucidate the effects of ambient CO 2 (400 ± 10 μmol mol −1 ) and two levels of ECO 2 (550 ± 20 μmol mol −1 and 700 ± 20 μmol mol −1 ) under well watered condition (WW) and water deficit stressed to −60 kPa on water productivity (Wp) and antioxidant enzyme activities in rice. In water deficit treatments, measured amount of water was applied as surface irrigation, each time the soil water potential as measured by tensiometers, reached −60 kPa. The results showed that ECO 2 increased the growth and yield characteristics, e.g., leaf area index and productive tillers, resulting in an increase in grain and straw yield under both WW and WDS. The increased concentration of antioxidant enzymes like proline, catalase and peroxidase under ECO 2 helped the plant to combat the adverse effects of WDS. Under ECO 2 , there was a decrease in irrigation water input by 5–14%, resulting in increase in water productivity (Wp) by 35–49% under different water regimes. ECO 2 had positive effect on plant height, productive tillers, grain and straw yields even under WDS because the temperature at our study site did not increase beyond 33 °C during rice reproductive phase. Our data provides an opportunity to test theoretical models for evaluating rice production under climate change scenario." @default.
- W2735166246 created "2017-07-21" @default.
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- W2735166246 date "2017-10-01" @default.
- W2735166246 modified "2023-10-14" @default.
- W2735166246 title "Effects of elevated CO 2 concentration on water productivity and antioxidant enzyme activities of rice ( Oryza sativa L.) under water deficit stress" @default.
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- W2735166246 doi "https://doi.org/10.1016/j.fcr.2017.06.020" @default.
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