Growth under Fluctuating Light Reveals Large Trait Variation in a Panel of Arabidopsis Accessions

Plants
Elias KaiserUte Armbruster

Abstract

The capacity of photoautotrophs to fix carbon depends on the efficiency of the conversion of light energy into chemical potential by photosynthesis. In nature, light input into photosynthesis can change very rapidly and dramatically. To analyze how genetic variation in Arabidopsis thaliana affects photosynthesis and growth under dynamic light conditions, 36 randomly chosen natural accessions were grown under uniform and fluctuating light intensities. After 14 days of growth under uniform or fluctuating light regimes, maximum photosystem II quantum efficiency (Fv/Fm) was determined, photosystem II operating efficiency (ΦPSII) and non-photochemical quenching (NPQ) were measured in low light, and projected leaf area (PLA) as well as the number of visible leaves were estimated. Our data show that ΦPSII and PLA were decreased and NPQ was increased, while Fv/Fm and number of visible leaves were unaffected, in most accessions grown under fluctuating compared to uniform light. There were large changes between accessions for most of these parameters, which, however, were not correlated with genomic variation. Fast growing accessions under uniform light showed the largest growth reductions under fluctuating light, which correlated strong...Continue Reading

References

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Oct 28, 2019·The Biochemical Journal·Elias KaiserUte Armbruster

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Citations

Feb 16, 2021·Frontiers in Plant Science·Ruqayah Bhuiyan, Marc W van Iersel
Mar 7, 2021·Plants·Stefan Timm, Stéphanie Arrivault

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Methods Mentioned

BETA
PCA
Fluorescence
fluorescence imaging

Software Mentioned

ggpubr
Hmisc
dnadist
R
ggplot2
ImageJ
Google Maps Arabidopsis viewer
ImagingWin

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