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Examining ozone susceptibility in the genus Musa (bananas)

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Farha, M. N., Daniells, J. W., Cernusak, L. A., Ritmejeryte, E., Wangchuk, P., Sitch, S., Mercado, L. M., Hayes, F., Brown, F. and Cheesman, A. W. (2023) Examining ozone susceptibility in the genus Musa (bananas). Functional Plant Biology, 50 (12). pp. 1073-1085.


Article Link: https://doi.org/10.1071/FP22293

Publisher URL: https://www.publish.csiro.au/paper/FP22293


Tropospheric ozone (O3) is a global air pollutant that adversely affects plant growth. Whereas the impacts of O3 have previously been examined for some tropical commodity crops, no information is available for the pantropical crop, banana (Musa spp.). To address this, we exposed Australia’s major banana cultivar, Williams, to a range of [O3] in open top chambers. In addition, we examined 46 diverse Musa lines growing in a common garden for variation in three traits that are hypothesised to shape responses to O3: (1) leaf mass per area; (2) intrinsic water use efficiency; and (3) total antioxidant capacity. We show that O3 exposure had a significant effect on the biomass of cv. Williams, with significant reductions in both pseudostem and sucker biomass with increasing [O3]. This was accompanied by a significant increase in total antioxidant capacity and phenolic concentrations in older, but not younger, leaves, indicating the importance of cumulative O3 exposure. Using the observed trait diversity, we projected O3 tolerance among the 46 Musa lines growing in the common garden. Of these, cv. Williams ranked as one of the most O3-tolerant cultivars. This suggests that other genetic lines could be even more susceptible, with implications for banana production and food security throughout the tropics.

Item Type:Article
Corporate Creators:Department of Agriculture and Fisheries, Queensland
Business groups:Horticulture and Forestry Science
Keywords:banana, biomass, food security, leaf mass per area, ozone, total antioxidant capacity, total phenolic content, water use efficiency.
Subjects:Agriculture > Agriculture (General) > Agriculture and the environment
Agriculture > Agriculture (General) > Agricultural meteorology. Crops and climate
Plant culture > Fruit and fruit culture
Plant culture > Fruit and fruit culture > Culture of individual fruits or types of fruit > Bananas
Live Archive:19 Dec 2023 04:27
Last Modified:19 Dec 2023 04:27

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