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Climate 2019, 7(2), 23; https://doi.org/10.3390/cli7020023

High Variation in Resource Allocation Strategies among 11 Indian Wheat (Triticum aestivum) Cultivars Growing in High Ozone Environment

1
Department of Environmental and Biological Sciences, University of Eastern Finland, POB 111, 80101 Joensuu, Finland
2
Plant Ecology and Environmental Science, National Botanical Research Institute (CSIR-NBRI), Lucknow 226001, India
*
Author to whom correspondence should be addressed.
Institute of Technology, University of Tartu, 50411 Tartu, Estonia (Current address).
Received: 26 December 2018 / Revised: 23 January 2019 / Accepted: 23 January 2019 / Published: 28 January 2019
(This article belongs to the Special Issue Air Pollution and Plant Ecosystems)
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Abstract

Eleven local cultivars of wheat (Triticum aestivum) were chosen to study the effect of ambient ozone (O3) concentration in the Indo-Gangetic Plains (IGP) of India at two high-ozone experimental sites by using 300 ppm of Ethylenediurea (EDU) as a chemical protectant against O3. The O3 level was more than double the critical threshold reported for wheat grain production (AOT40 8.66 ppm h). EDU-grown plants had higher grain yield, biomass, stomatal conductance and photosynthesis, less lipid peroxidation, changes in superoxide dismutase and catalase activities, changes in content of oxidized and reduced glutathione compared to non-EDU plants, thus indicating the severity of O3 induced productivity loss. Based on the yield at two different growing sites, the cultivars could be addressed in four response groups: (a) generally well-adapted cultivars (above-average yield); (b) poorly-adapted (below-average yield); (c) adapted to low-yield environment (below-average yield); and (d) sensitive cultivars (adapted to high-yield environment). EDU responses were dependent on the cultivar, the developmental phase (vegetative, flowering and harvest) and the experimental site. View Full-Text
Keywords: cultivars; EDU (ethylenediurea); grain yield; India; ozone; wheat cultivars; EDU (ethylenediurea); grain yield; India; ozone; wheat
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Pandey, A.K.; Majumder, B.; Keski-Saari, S.; Kontunen-Soppela, S.; Pandey, V.; Oksanen, E. High Variation in Resource Allocation Strategies among 11 Indian Wheat (Triticum aestivum) Cultivars Growing in High Ozone Environment. Climate 2019, 7, 23.

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