Influence of the chlorophylls-to-carotenoids ratio on light use efficiency estimation by optical parameters

0485226 - ÚVGZ 2019 RIV CZ eng C - Conference Paper (international conference)
Ač, Alexander - Kováč, Daniel - Veselovská, Petra - Večeřová, Kristýna - Klem, Karel
Influence of the chlorophylls-to-carotenoids ratio on light use efficiency estimation by optical parameters.
Quo vaditis agriculture, forestry and society under global change? Conference proceeding. Brno: Global change research institute, 2017 - (Urban, O.; Šprtová, M.; Klem, K.), s. 58-61. ISBN 978-80-87902-22-6.
[Quo vaditis agriculture, forestry and society under Global Change? Velké Karlovice (CZ), 02.10.2017-04.10.2017]
R&D Projects: GA MŠMT(CZ) LO1415; GA MŠMT(CZ) LM2015061
Institutional support: RVO:86652079
Keywords : chlorophylls carotenoids * light use efficiency * optical parameters
OECD category: Plant sciences, botany

The influence is examined of changing leaf photosynthetic pigments concentrations on sensitivity of the
photochemical reflectance index (PRI) and ΔPRI optical parameters in relation to light use efficiency
(LUE). Photosynthetic and leaf chlorophylls-to-carotenoids (Chl/Car) ratio changes during the growth of
European Beech (Fagus sylvatica) and Norway spruce (Picea abies) saplings were induced by altering the
living environment inside growth chambers. Point reflectance measurements of each individual tree were
recording changes in optical properties while measurements were being taken simultaneously of altering
photosynthesis. Based on the evaluation of 45 pairs of measurements conducted on six individual saplings,
the observed variability in the strength of the PRI and ΔPRI versus LUE relationships was compared to the
resulting leaf Chl/Car ratio of each tree. Data were used to explain the influence of changing pigments on
the sensitivity of each individual optical parameter with regards to the LUE estimation.
Permanent Link: http://hdl.handle.net/11104/0280295