Examining ozone effects on the tropical C4 crop Sorghum bicolor
Farha, Mst Nahid, Brown, Flossie, Cernusak, Lucas A., Sitch, Stephen, and Cheesman, Alexander W. (2025) Examining ozone effects on the tropical C4 crop Sorghum bicolor. PeerJ, 13 (1). e18844.
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Abstract
Ozone (O<inf>3</inf>), a major air pollutant, can negatively impact plant growth and yield. While O<inf>3</inf> impacts have been widely documented in crops such as wheat and soybean, few studies have looked at the effects of O<inf>3</inf> on sorghum, a C<inf>4</inf> plant and the fifth most important cereal crop worldwide. We exposed grain sorghum (Sorghum bicolor cv. HAT150843) to a range of O<inf>3</inf> concentrations (daytime mean O<inf>3</inf> concentrations ranged between 20 and 97 ppb) in open-top chambers, and examined how whole plant and leaf morphological traits varied in response to O<inf>3</inf> exposure. Results showed no significant impact of realistic O<inf>3</inf> exposure on whole plant biomass and its partitioning in sorghum. These findings suggest that sorghum is generally resistant to O<inf>3</inf> and should be considered as a favourable crop in O<inf>3</inf> polluted regions, while acknowledging further research is needed to understand the mechanistic basis of O<inf>3</inf> tolerance in sorghum.
| Item ID: | 88538 |
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| Item Type: | Article (Research - C1) |
| ISSN: | 2167-8359 |
| Keywords: | Biomass, Leaf mass per area, Stomatal properties |
| Copyright Information: | © 2025 Farha et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits using, remixing, and building upon the work non-commercially, as long as it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited. |
| Date Deposited: | 12 May 2026 05:02 |
| FoR Codes: | 30 AGRICULTURAL, VETERINARY AND FOOD SCIENCES > 3004 Crop and pasture production > 300402 Agro-ecosystem function and prediction @ 100% |
| SEO Codes: | 26 PLANT PRODUCTION AND PLANT PRIMARY PRODUCTS > 2603 Grains and seeds > 260310 Sorghum @ 100% |
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