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Does Fluctuating Light Affect Crop Yield? A Focus on the Dynamic Photosynthesis of Two Soybean Varieties

Salvatori Nicole
•
Alberti Giorgio
•
Muller Onno
•
Peressotti Alessandro
2022
  • journal article

Periodico
FRONTIERS IN PLANT SCIENCE
Abstract
In natural environments, plants are exposed to variable light conditions, but photosynthesis has been mainly studied at steady state and this might overestimate carbon (C) uptake at the canopy scale. To better elucidate the role of light fluctuations on canopy photosynthesis, we investigated how the chlorophyll content, and therefore the different absorbance of light, would affect the quantum yield in fluctuating light conditions. For this purpose, we grew a commercial variety (Eiko) and a chlorophyll deficient mutant (MinnGold) either in fluctuating (F) or non-fluctuating (NF) light conditions with sinusoidal changes in irradiance. Two different light treatments were also applied: a low light treatment (LL; max 650 μmol m−2 s−1) and a high light treatment (HL; max 1,000 μmol m−2 s−1). Canopy gas exchanges were continuously measured throughout the experiment. We found no differences in C uptake in LL treatment, either under F or NF. Light fluctuations were instead detrimental for the chlorophyll deficient mutant in HL conditions only, while the green variety seemed to be well-adapted to them. Varieties adapted to fluctuating light might be identified to target the molecular mechanisms responsible for such adaptations.
DOI
10.3389/fpls.2022.862275
WOS
WOS:000805883800001
Archivio
http://hdl.handle.net/11368/3020522
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85130010674
https://www.frontiersin.org/articles/10.3389/fpls.2022.862275/full
Diritti
open access
FVG url
https://arts.units.it/bitstream/11368/3020522/1/fpls-13-862275.pdf
Soggetti
  • dynamic photosynthesi...

  • growth chamber

  • fluctuation

  • gas exchange

  • NPP

  • chlorophyll deficient...

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