Differential Ozone Responses Identified among Key Rust-Susceptible Wheat Genotypes
Increasing ambient ozone (O<sub>3</sub>) concentrations and resurgent rust diseases are two concomitant limiting factors to wheat production worldwide. Breeding resilient wheat cultivars bearing rust resistance and O<sub>3</sub> tolerance while maintaining high yield is criti...
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| Format: | Article |
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MDPI AG
2020-11-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/10/12/1853 |
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| author | Alsayed M. Mashaheet Kent O. Burkey Costas J. Saitanis Abdelrazek S. Abdelrhim Rafiullah David S. Marshall |
| author_facet | Alsayed M. Mashaheet Kent O. Burkey Costas J. Saitanis Abdelrazek S. Abdelrhim Rafiullah David S. Marshall |
| author_sort | Alsayed M. Mashaheet |
| collection | DOAJ |
| description | Increasing ambient ozone (O<sub>3</sub>) concentrations and resurgent rust diseases are two concomitant limiting factors to wheat production worldwide. Breeding resilient wheat cultivars bearing rust resistance and O<sub>3</sub> tolerance while maintaining high yield is critical for global food security. This study aims at identifying ozone tolerance among key rust-susceptible wheat genotypes [Rust near-universal susceptible genotypes (RnUS)], as a first step towards achieving this goal. Tested RnUS included seven bread wheat genotypes (Chinese Spring, Line E, Little Club, LMPG 6, McNair 701, Morocco and Thatcher), and one durum wheat line (Rusty). Plants were treated with five O<sub>3</sub> concentrations (CF, 50, 70, 90, and 110 ppb), in two O<sub>3</sub> exposure systems [continuous stirred tank reactors (CSTR) and outdoor-plant environment chambers (OPEC)], at 21–23 Zadoks decimal growth stage. Visible injury and biomass accumulation rate were used to assess O<sub>3</sub> responses. Visible injury data showed consistent order of genotype sensitivity (Thatcher, LMPG 6 > McNair 701, Rusty > Line E, Morocco, Little Club > Chinese Spring). Additionally, leaves at different orders showed differential O<sub>3</sub> responses. Biomass accumulation under O<sub>3</sub> stress showed similar results for the bread wheat genotypes. However, the durum wheat line “Rusty” had the most O<sub>3</sub>-sensitive biomass production, providing a contrasting O<sub>3</sub> response to the tolerance reported in durum wheat. Chinese Spring was the most tolerant genotype based on both parameters and could be used as a source for O<sub>3</sub> tolerance, while sensitive genotypes could be used as sensitive parents in mapping O<sub>3</sub> tolerance in bread wheat. The suitability of visible symptoms and biomass responses in high-throughput screening of wheat for O<sub>3</sub> tolerance was discussed. The results presented in this research could assist in developing future approaches to accelerate breeding wheat for O<sub>3</sub> tolerance using existing breeding materials. |
| first_indexed | 2024-03-10T14:36:16Z |
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| id | doaj.art-c42d45abb62d40bb996d3813ea2bac96 |
| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-10T14:36:16Z |
| publishDate | 2020-11-01 |
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| series | Agronomy |
| spelling | doaj.art-c42d45abb62d40bb996d3813ea2bac962023-11-20T22:13:28ZengMDPI AGAgronomy2073-43952020-11-011012185310.3390/agronomy10121853Differential Ozone Responses Identified among Key Rust-Susceptible Wheat GenotypesAlsayed M. Mashaheet0Kent O. Burkey1Costas J. Saitanis2Abdelrazek S. Abdelrhim3Rafiullah4David S. Marshall5Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC 27695, USAUSDA-ARS, Plant Science Research Unit, Raleigh, NC 27695, USALab of Ecology and Environmental Science, Agricultural University of Athens, 11855 Athens, GreeceDepartment of Plant Pathology, Faculty of Agriculture, Minia University, El-Minia 61519, EgyptDepartment of Agriculture, University of Swabi, Khyber Pakhtunkhwa 23561, PakistanUSDA-ARS, Plant Science Research Unit, Raleigh, NC 27695, USAIncreasing ambient ozone (O<sub>3</sub>) concentrations and resurgent rust diseases are two concomitant limiting factors to wheat production worldwide. Breeding resilient wheat cultivars bearing rust resistance and O<sub>3</sub> tolerance while maintaining high yield is critical for global food security. This study aims at identifying ozone tolerance among key rust-susceptible wheat genotypes [Rust near-universal susceptible genotypes (RnUS)], as a first step towards achieving this goal. Tested RnUS included seven bread wheat genotypes (Chinese Spring, Line E, Little Club, LMPG 6, McNair 701, Morocco and Thatcher), and one durum wheat line (Rusty). Plants were treated with five O<sub>3</sub> concentrations (CF, 50, 70, 90, and 110 ppb), in two O<sub>3</sub> exposure systems [continuous stirred tank reactors (CSTR) and outdoor-plant environment chambers (OPEC)], at 21–23 Zadoks decimal growth stage. Visible injury and biomass accumulation rate were used to assess O<sub>3</sub> responses. Visible injury data showed consistent order of genotype sensitivity (Thatcher, LMPG 6 > McNair 701, Rusty > Line E, Morocco, Little Club > Chinese Spring). Additionally, leaves at different orders showed differential O<sub>3</sub> responses. Biomass accumulation under O<sub>3</sub> stress showed similar results for the bread wheat genotypes. However, the durum wheat line “Rusty” had the most O<sub>3</sub>-sensitive biomass production, providing a contrasting O<sub>3</sub> response to the tolerance reported in durum wheat. Chinese Spring was the most tolerant genotype based on both parameters and could be used as a source for O<sub>3</sub> tolerance, while sensitive genotypes could be used as sensitive parents in mapping O<sub>3</sub> tolerance in bread wheat. The suitability of visible symptoms and biomass responses in high-throughput screening of wheat for O<sub>3</sub> tolerance was discussed. The results presented in this research could assist in developing future approaches to accelerate breeding wheat for O<sub>3</sub> tolerance using existing breeding materials.https://www.mdpi.com/2073-4395/10/12/1853global food securityresilient wheatrelative growth rateozone injury |
| spellingShingle | Alsayed M. Mashaheet Kent O. Burkey Costas J. Saitanis Abdelrazek S. Abdelrhim Rafiullah David S. Marshall Differential Ozone Responses Identified among Key Rust-Susceptible Wheat Genotypes Agronomy global food security resilient wheat relative growth rate ozone injury |
| title | Differential Ozone Responses Identified among Key Rust-Susceptible Wheat Genotypes |
| title_full | Differential Ozone Responses Identified among Key Rust-Susceptible Wheat Genotypes |
| title_fullStr | Differential Ozone Responses Identified among Key Rust-Susceptible Wheat Genotypes |
| title_full_unstemmed | Differential Ozone Responses Identified among Key Rust-Susceptible Wheat Genotypes |
| title_short | Differential Ozone Responses Identified among Key Rust-Susceptible Wheat Genotypes |
| title_sort | differential ozone responses identified among key rust susceptible wheat genotypes |
| topic | global food security resilient wheat relative growth rate ozone injury |
| url | https://www.mdpi.com/2073-4395/10/12/1853 |
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