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The enhancement of photosynthetic performance, water use efficiency and potato yield under elevated CO(2) is cultivar dependent
As a fourth major food crop, potato could fulfill the nutritional demand of the growing population. Understanding how potato plants respond to predicted increase in atmospheric CO(2) at the physiological, biochemical and molecular level is therefore important to improve potato productivity. Thus, th...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2023
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10690597/ https://www.ncbi.nlm.nih.gov/pubmed/38046606 http://dx.doi.org/10.3389/fpls.2023.1287825 |
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author | Dahal, Keshav Milne, Matthew A. Gervais, Taylor |
author_facet | Dahal, Keshav Milne, Matthew A. Gervais, Taylor |
author_sort | Dahal, Keshav |
collection | PubMed |
description | As a fourth major food crop, potato could fulfill the nutritional demand of the growing population. Understanding how potato plants respond to predicted increase in atmospheric CO(2) at the physiological, biochemical and molecular level is therefore important to improve potato productivity. Thus, the main objectives of the present study are to investigate the effects of elevated CO(2) on the photosynthetic performance, water use efficiency and tuber yield of various commercial potato cultivars combined with biochemical and molecular analyses. We grew five potato cultivars (AC Novachip, Atlantic, Kennebec, Russet Burbank and Shepody) at either ambient CO(2) (400 μmol CO(2) mol(−1)) or elevated (750 μmol CO(2) mol(−1)) CO(2). Compared to ambient CO(2)-grown counterparts, elevated CO(2)-grown Russet Burbank and Shepody exhibited a significant increase in tuber yield of 107% and 49% respectively, whereas AC Novachip, Atlantic and Kennebec exhibited a 16%, 6% and 44% increment respectively. These differences in CO(2)-enhancement of tuber yield across the cultivars were mainly associated with the differences in CO(2)-stimulation of rates of photosynthesis. For instance, elevated CO(2) significantly stimulated the rates of gross photosynthesis for AC Novachip (30%), Russet Burbank (41%) and Shepody (28%) but had minimal effects for Atlantic and Kennebec when measured at growth light. Elevated CO(2) significantly increased the total tuber number for Atlantic (40%) and Shepody (83%) but had insignificant effects for other cultivars. Average tuber size increased for AC Novachip (16%), Kennebec (30%) and Russet Burbank (80%), but decreased for Atlantic (25%) and Shepody (19%) under elevated versus ambient CO(2) conditions. Although elevated CO(2) minimally decreased stomatal conductance (6–22%) and transpiration rates (2–36%), instantaneous water use efficiency increased by up to 79% in all cultivars suggesting that enhanced water use efficiency was mainly associated with increased photosynthesis at elevated CO(2). The effects of elevated CO(2) on electron transport rates, non-photochemical quenching, excitation pressure, and leaf chlorophyll and protein content varied across the cultivars. We did not observe any significant differences in plant growth and morphology in elevated versus ambient CO(2)-grown plants. Taken all together, we conclude that the CO(2)-stimulation of photosynthetic performance, water use efficiency and tuber yield of potatoes is cultivar dependent. |
format | Online Article Text |
id | pubmed-10690597 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-106905972023-12-02 The enhancement of photosynthetic performance, water use efficiency and potato yield under elevated CO(2) is cultivar dependent Dahal, Keshav Milne, Matthew A. Gervais, Taylor Front Plant Sci Plant Science As a fourth major food crop, potato could fulfill the nutritional demand of the growing population. Understanding how potato plants respond to predicted increase in atmospheric CO(2) at the physiological, biochemical and molecular level is therefore important to improve potato productivity. Thus, the main objectives of the present study are to investigate the effects of elevated CO(2) on the photosynthetic performance, water use efficiency and tuber yield of various commercial potato cultivars combined with biochemical and molecular analyses. We grew five potato cultivars (AC Novachip, Atlantic, Kennebec, Russet Burbank and Shepody) at either ambient CO(2) (400 μmol CO(2) mol(−1)) or elevated (750 μmol CO(2) mol(−1)) CO(2). Compared to ambient CO(2)-grown counterparts, elevated CO(2)-grown Russet Burbank and Shepody exhibited a significant increase in tuber yield of 107% and 49% respectively, whereas AC Novachip, Atlantic and Kennebec exhibited a 16%, 6% and 44% increment respectively. These differences in CO(2)-enhancement of tuber yield across the cultivars were mainly associated with the differences in CO(2)-stimulation of rates of photosynthesis. For instance, elevated CO(2) significantly stimulated the rates of gross photosynthesis for AC Novachip (30%), Russet Burbank (41%) and Shepody (28%) but had minimal effects for Atlantic and Kennebec when measured at growth light. Elevated CO(2) significantly increased the total tuber number for Atlantic (40%) and Shepody (83%) but had insignificant effects for other cultivars. Average tuber size increased for AC Novachip (16%), Kennebec (30%) and Russet Burbank (80%), but decreased for Atlantic (25%) and Shepody (19%) under elevated versus ambient CO(2) conditions. Although elevated CO(2) minimally decreased stomatal conductance (6–22%) and transpiration rates (2–36%), instantaneous water use efficiency increased by up to 79% in all cultivars suggesting that enhanced water use efficiency was mainly associated with increased photosynthesis at elevated CO(2). The effects of elevated CO(2) on electron transport rates, non-photochemical quenching, excitation pressure, and leaf chlorophyll and protein content varied across the cultivars. We did not observe any significant differences in plant growth and morphology in elevated versus ambient CO(2)-grown plants. Taken all together, we conclude that the CO(2)-stimulation of photosynthetic performance, water use efficiency and tuber yield of potatoes is cultivar dependent. Frontiers Media S.A. 2023-11-16 /pmc/articles/PMC10690597/ /pubmed/38046606 http://dx.doi.org/10.3389/fpls.2023.1287825 Text en Copyright © 2023 His Majesty the King in Right of Canada, as represented by the Minister of Agriculture and Agri-Food Canada for the contribution of Keshav Dahal, Matthew A Milne and Taylor Gervais https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Plant Science Dahal, Keshav Milne, Matthew A. Gervais, Taylor The enhancement of photosynthetic performance, water use efficiency and potato yield under elevated CO(2) is cultivar dependent |
title | The enhancement of photosynthetic performance, water use efficiency and potato yield under elevated CO(2) is cultivar dependent |
title_full | The enhancement of photosynthetic performance, water use efficiency and potato yield under elevated CO(2) is cultivar dependent |
title_fullStr | The enhancement of photosynthetic performance, water use efficiency and potato yield under elevated CO(2) is cultivar dependent |
title_full_unstemmed | The enhancement of photosynthetic performance, water use efficiency and potato yield under elevated CO(2) is cultivar dependent |
title_short | The enhancement of photosynthetic performance, water use efficiency and potato yield under elevated CO(2) is cultivar dependent |
title_sort | enhancement of photosynthetic performance, water use efficiency and potato yield under elevated co(2) is cultivar dependent |
topic | Plant Science |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10690597/ https://www.ncbi.nlm.nih.gov/pubmed/38046606 http://dx.doi.org/10.3389/fpls.2023.1287825 |
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