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Correction of PRI for carotenoid pigment pools improves photosynthesis estimation across different irradiance and temperature conditions
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SYSNO ASEP 0524561 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Correction of PRI for carotenoid pigment pools improves photosynthesis estimation across different irradiance and temperature conditions Author(s) Kováč, Daniel (UEK-B) RID, ORCID, SAI
Veselá, Barbora (UEK-B) SAI, RID
Klem, Karel (UEK-B) RID, ORCID, SAI
Večeřová, Kristýna (UEK-B) RID, SAI, ORCID
Materová Kmecová, Z. (CZ)
Penuelas, Josep (UEK-B) ORCID, SAI, RID
Urban, Otmar (UEK-B) RID, ORCID, SAINumber of authors 7 Article number 111834 Source Title Remote Sensing of Environment. - : Elsevier - ISSN 0034-4257
Roč. 244, JUL (2020)Number of pages 13 s. Language eng - English Country US - United States Keywords photochemical reflectance index ; light-use efficiency ; radiation-use efficiency ; xanthophyll cycle ; norway spruce ; chlorophyll fluorescence ; energy-dissipation ; vertical patterns ; remote estimation ; photosystem-ii ; Photochemical reflectance index ; Proximal sensing ; Irradiance ; Temperature ; Carotenoids ; Xanthophyll cycle ; Light use efficiency Subject RIV BH - Optics, Masers, Lasers OECD category Remote sensing R&D Projects LM2015061 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EF16_019/0000797 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Research Infrastructure CzeCOS III - 90123 - Ústav výzkumu globální změny AV ČR, v. v. i. Method of publishing Limited access Institutional support UEK-B - RVO:86652079 UT WOS 000532837400016 EID SCOPUS 85083755756 DOI 10.1016/j.rse.2020.111834 Annotation We studied the influence of changing carotenoid pigments on the sensitivity of the photochemical reflectance index (PRI) to photosynthesis dynamics. The goal of the measurements was to examine how the introduction of Delta PRI into the working dataset can improve the estimation of photosynthesis. Spectral and photosynthetic characteristics of European beech and Norway spruce saplings were periodically measured in growth chambers with an adjustable irradiance and temperature. Patterns of environmental changes inside the growth chambers were created by periodic changes in irradiance and temperature. Four general irradiance periods lasting 10-12 days each were established. Introduced irradiance regimes varied in the sum of daily irradiance and amplitude of irradiance changes. Temperature was changed with more complex patterns to induce changes in xanthophyll cycle pigments at various time scales within these regimes. Our measurements confirmed the PRI linkage to photosynthetic light use efficiency (LUE). However, the strength of this connection was found to be dependent on changing pigment concentrations, specifically on the change in the ratio of chlorophylls to carotenoids. Furthermore, a negative interference in photosynthesis estimation from PRI was recorded if the temperature was lowered overnight to 12 degrees C. The differential PRI (Delta PRI), calculated as the simple difference between the PRI value measured during the daytime period and in early morning (PRI0), revealed a decreased effect from pigments and cold temperature on LUE estimation. The regression analysis among all measured data identified an increased association between PRI and LUE following the introduction of Delta PRI from R-2 = 0.26 to 0.69 in beech and from R-2 = 0.61 to 0.77 in spruce data. The analyses showed that both leaf carotenoid concentrations and the conversion state of xanthophyll cycle pigments played a significant role in determining PRI and PRI0 values and that the accurate assessment of these pigments in PRI across multiple levels of stress from irradiance and temperature might improve estimations of LUE through Delta PRI. In our data, Delta PRI appeared to be a good measure of photosynthesis, the dynamics of which differed between beech and spruce saplings upon switching temperatures. Workplace Global Change Research Institute Contact Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Year of Publishing 2021 Electronic address https://www.sciencedirect.com/science/article/pii/S0034425720302042?via%3Dihub
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