Biochemical constrains limit the potential of the photochemical reflectance index as a predictor of effective quantum efficiency of photosynthesis during the winter spring transition in Jack pine seedlings

Functional Plant Biology : FPB
Florian BuschIngo Ensminger

Abstract

Leaf reflectance spectral measurements are an emerging non-invasive technique that can be used to derive the photochemical reflectance index (PRI) to assess the physiological state of plants from leaf to ecosystem level. Changes in PRI are associated with changes in the xanthophyll cycle activity and provide an estimate of changes in the effective photochemical quantum efficiency (ΦII) during the growing season. However, we hypothesised that the correlation between PRI and ΦII might be poor when the xanthophyll cycle is primed for sustained thermal dissipation of the light energy absorbed. To test our hypothesis, we studied the recovery of winter acclimated Jack pine (Pinus banksiana Lamb.) seedlings that were exposed to different simulated spring recovery treatments in controlled environments. Different growth temperatures and light intensities were used to dissect the effect of these two factors on chlorophyll fluorescence, pigment composition and leaf reflectance. ΦII showed a clear response to temperature whereas PRI was mostly affected by light intensity. In contrast, the de-epoxidation state of the xanthophyll cycle pigments was both temperature and light dependent. Our data suggest that zeaxanthin-independent non-photoch...Continue Reading

References

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Sep 6, 2000·Proceedings of the National Academy of Sciences of the United States of America·A M Gilmore, M C Ball
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Citations

Jun 16, 2017·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Elodie MerlierKamel Soudani
Sep 26, 2020·Frontiers in Plant Science·Samuel Henrique KamphorstEliemar Campostrini
May 13, 2020·Global Change Biology·Emmanuelle FréchetteIngo Ensminger
Dec 4, 2019·Plant Biotechnology Journal·Coralie E Salesse-SmithDavid B Stern
Oct 30, 2020·The New Phytologist·Bijan SeyednasrollahAndrew D Richardson
Apr 4, 2021·Plants·Fernando Henrique ReboredoJosé C Ramalho
Sep 1, 2021·Plant, Cell & Environment·Petra D'OdoricoIngo Ensminger

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