Growth, physiology, and stomatal parameters of plant polyploids grown under ice age, present-day, and future CO2 concentrations

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Publikace nespadá pod Ekonomicko-správní fakultu, ale pod Přírodovědeckou fakultu. Oficiální stránka publikace je na webu muni.cz.
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ŠMARDA Petr KLEM Karel KNÁPEK Ondřej VESELA Barbora VESELÁ Kristýna HOLUB Petr KUCHAŘ Vít ŠILEROVÁ Alexandra HOROVÁ Lucie BUREŠ Petr

Rok publikování 2023
Druh Článek v odborném periodiku
Časopis / Zdroj New Phytologist
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
www https://doi.org/10.1111/nph.18955
Doi http://dx.doi.org/10.1111/nph.18955
Klíčová slova atmospheric carbon dioxide; cell size; climate change; genome size; glacial periods; photosynthesis; polyploidy; stomatal conductance
Popis center dot Polyploidy plays an important role in plant evolution, but knowledge of its ecophysiological consequences, such as of the putatively enlarged stomata of polyploid plants, remains limited. Enlarged stomata should disadvantage polyploids at low CO2 concentrations (namely during the Quaternary glacial periods) because larger stomata are viewed as less effective at CO2 uptake. center dot We observed the growth, physiology, and epidermal cell features of 15 diploids and their polyploid relatives cultivated under glacial, present-day, and potential future atmospheric CO2 concentrations (200, 400, and 800 ppm respectively). center dot We demonstrated some well-known polyploidy effects, such as faster growth and larger leaves, seeds, stomata, and other epidermal cells. The stomata of polyploids, however, tended to be more elongated than those of diploids, and contrary to common belief, they had no negative effect on the CO2 uptake capacity of polyploids. Moreover, polyploids grew comparatively better than diploids even at low, glacial CO2 concentrations. Higher polyploids with large genomes also showed increased operational stomatal conductance and consequently, a lower water-use efficiency. center dot Our results point to a possible decrease in growth superiority of polyploids over diploids in a current and future high CO2 climactic scenarios, as well as the possible water and/or nutrient dependency of higher polyploids.
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