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Bioenergy sorghum maintains photosynthetic capacity in elevated ozone concentrations

Elevated tropospheric ozone concentration (O(3)) significantly reduces photosynthesis and productivity in several C(4) crops including maize, switchgrass and sugarcane. However, it is unknown how O(3) affects plant growth, development and productivity in sorghum (Sorghum bicolor L.), an emerging C(4...

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Autores principales: Li, Shuai, Moller, Christopher A., Mitchell, Noah G., Lee, DoKyoung, Ainsworth, Elizabeth A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley & Sons, Ltd. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7986789/
https://www.ncbi.nlm.nih.gov/pubmed/33245145
http://dx.doi.org/10.1111/pce.13962
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author Li, Shuai
Moller, Christopher A.
Mitchell, Noah G.
Lee, DoKyoung
Ainsworth, Elizabeth A.
author_facet Li, Shuai
Moller, Christopher A.
Mitchell, Noah G.
Lee, DoKyoung
Ainsworth, Elizabeth A.
author_sort Li, Shuai
collection PubMed
description Elevated tropospheric ozone concentration (O(3)) significantly reduces photosynthesis and productivity in several C(4) crops including maize, switchgrass and sugarcane. However, it is unknown how O(3) affects plant growth, development and productivity in sorghum (Sorghum bicolor L.), an emerging C(4) bioenergy crop. Here, we investigated the effects of elevated O(3) on photosynthesis, biomass and nutrient composition of a number of sorghum genotypes over two seasons in the field using free‐air concentration enrichment (FACE), and in growth chambers. We also tested if elevated O(3) altered the relationship between stomatal conductance and environmental conditions using two common stomatal conductance models. Sorghum genotypes showed significant variability in plant functional traits, including photosynthetic capacity, leaf N content and specific leaf area, but responded similarly to O(3). At the FACE experiment, elevated O(3) did not alter net CO(2) assimilation (A), stomatal conductance (g (s)), stomatal sensitivity to the environment, chlorophyll fluorescence and plant biomass, but led to reductions in the maximum carboxylation capacity of phosphoenolpyruvate and increased stomatal limitation to A in both years. These findings suggest that bioenergy sorghum is tolerant to O(3) and could be used to enhance biomass productivity in O(3) polluted regions.
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spelling pubmed-79867892021-03-25 Bioenergy sorghum maintains photosynthetic capacity in elevated ozone concentrations Li, Shuai Moller, Christopher A. Mitchell, Noah G. Lee, DoKyoung Ainsworth, Elizabeth A. Plant Cell Environ Original Articles Elevated tropospheric ozone concentration (O(3)) significantly reduces photosynthesis and productivity in several C(4) crops including maize, switchgrass and sugarcane. However, it is unknown how O(3) affects plant growth, development and productivity in sorghum (Sorghum bicolor L.), an emerging C(4) bioenergy crop. Here, we investigated the effects of elevated O(3) on photosynthesis, biomass and nutrient composition of a number of sorghum genotypes over two seasons in the field using free‐air concentration enrichment (FACE), and in growth chambers. We also tested if elevated O(3) altered the relationship between stomatal conductance and environmental conditions using two common stomatal conductance models. Sorghum genotypes showed significant variability in plant functional traits, including photosynthetic capacity, leaf N content and specific leaf area, but responded similarly to O(3). At the FACE experiment, elevated O(3) did not alter net CO(2) assimilation (A), stomatal conductance (g (s)), stomatal sensitivity to the environment, chlorophyll fluorescence and plant biomass, but led to reductions in the maximum carboxylation capacity of phosphoenolpyruvate and increased stomatal limitation to A in both years. These findings suggest that bioenergy sorghum is tolerant to O(3) and could be used to enhance biomass productivity in O(3) polluted regions. John Wiley & Sons, Ltd. 2021-01-21 2021-03 /pmc/articles/PMC7986789/ /pubmed/33245145 http://dx.doi.org/10.1111/pce.13962 Text en © 2020 The Authors. Plant, Cell & Environment published by John Wiley & Sons Ltd. This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.
spellingShingle Original Articles
Li, Shuai
Moller, Christopher A.
Mitchell, Noah G.
Lee, DoKyoung
Ainsworth, Elizabeth A.
Bioenergy sorghum maintains photosynthetic capacity in elevated ozone concentrations
title Bioenergy sorghum maintains photosynthetic capacity in elevated ozone concentrations
title_full Bioenergy sorghum maintains photosynthetic capacity in elevated ozone concentrations
title_fullStr Bioenergy sorghum maintains photosynthetic capacity in elevated ozone concentrations
title_full_unstemmed Bioenergy sorghum maintains photosynthetic capacity in elevated ozone concentrations
title_short Bioenergy sorghum maintains photosynthetic capacity in elevated ozone concentrations
title_sort bioenergy sorghum maintains photosynthetic capacity in elevated ozone concentrations
topic Original Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7986789/
https://www.ncbi.nlm.nih.gov/pubmed/33245145
http://dx.doi.org/10.1111/pce.13962
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