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Statements

Subject Item
n2:RIV%2F67179843%3A_____%2F12%3A00385088%21RIV13-AV0-67179843
rdf:type
n13:Vysledek skos:Concept
dcterms:description
This laboratory experiment tested the ability of the spectral index called area under curve normalised to maximal band depth’ (ANMB) to track dynamic changes in the xanthophyll cycle of Norway spruce (Picea abies (L.) Karsten) needles. Four-year-old spruce seedlings were gradually acclimated to different photosynthetic photon flux densities (PPFDs) and air temperature regimes. The measurements were conducted at the end of each acclimation period lasting for 11 days. A significant decline in the chlorophylls to carotenoids ratio and the increase of the amount of xanthophyll cycle pigments indicated a higher need for carotenoid-mediated photoprotection in spruce leaves acclimated to high PPFD conditions. Similarly, the photochemical reflectance index (PRI) changed from positive to negative values after changing light conditions from low to high intensity as a consequence of the increase in carotenoid content. Systematic responses of PRI to the de-epoxidation state of xanthophyll cycle pigments (DEPS) were, however, observed only during high temperature treatments and after the exposition of needles to high irradiance. The ANMB index computed from needle reflectance between 507 and 556 nm was able to track dynamic changes in DEPS without any influence induced by changing the content of leaf photosynthetic pigments (chlorophylls, carotenoids). This laboratory experiment tested the ability of the spectral index called area under curve normalised to maximal band depth’ (ANMB) to track dynamic changes in the xanthophyll cycle of Norway spruce (Picea abies (L.) Karsten) needles. Four-year-old spruce seedlings were gradually acclimated to different photosynthetic photon flux densities (PPFDs) and air temperature regimes. The measurements were conducted at the end of each acclimation period lasting for 11 days. A significant decline in the chlorophylls to carotenoids ratio and the increase of the amount of xanthophyll cycle pigments indicated a higher need for carotenoid-mediated photoprotection in spruce leaves acclimated to high PPFD conditions. Similarly, the photochemical reflectance index (PRI) changed from positive to negative values after changing light conditions from low to high intensity as a consequence of the increase in carotenoid content. Systematic responses of PRI to the de-epoxidation state of xanthophyll cycle pigments (DEPS) were, however, observed only during high temperature treatments and after the exposition of needles to high irradiance. The ANMB index computed from needle reflectance between 507 and 556 nm was able to track dynamic changes in DEPS without any influence induced by changing the content of leaf photosynthetic pigments (chlorophylls, carotenoids).
dcterms:title
Reflectance continuum removal spectral index tracking the xanthophyll cycle photoprotective reactions in Norway spruce needles Reflectance continuum removal spectral index tracking the xanthophyll cycle photoprotective reactions in Norway spruce needles
skos:prefLabel
Reflectance continuum removal spectral index tracking the xanthophyll cycle photoprotective reactions in Norway spruce needles Reflectance continuum removal spectral index tracking the xanthophyll cycle photoprotective reactions in Norway spruce needles
skos:notation
RIV/67179843:_____/12:00385088!RIV13-AV0-67179843
n13:predkladatel
n15:ico%3A67179843
n3:aktivita
n12:P n12:I
n3:aktivity
I, P(ED1.1.00/02.0073), P(ED2.1.00/03.0100), P(SP/2D1/70/08)
n3:cisloPeriodika
12
n3:dodaniDat
n10:2013
n3:domaciTvurceVysledku
n5:2935007 n5:7131038 n5:3280551 n5:3543544
n3:druhVysledku
n9:J
n3:duvernostUdaju
n16:S
n3:entitaPredkladatele
n11:predkladatel
n3:idSjednocenehoVysledku
164539
n3:idVysledku
RIV/67179843:_____/12:00385088
n3:jazykVysledku
n7:eng
n3:klicovaSlova
diurnal course; growth chambers; photosynthetic pigments composition; Picea abies; reflectance continuum removal; xanthophyll cycle
n3:klicoveSlovo
n6:diurnal%20course n6:Picea%20abies n6:reflectance%20continuum%20removal n6:growth%20chambers n6:photosynthetic%20pigments%20composition n6:xanthophyll%20cycle
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[406B7B72E8E5]
n3:nazevZdroje
Functional Plant Biology
n3:obor
n17:EH
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
6
n3:projekt
n4:ED2.1.00%2F03.0100 n4:SP%2F2D1%2F70%2F08 n4:ED1.1.00%2F02.0073
n3:rokUplatneniVysledku
n10:2012
n3:svazekPeriodika
39
n3:tvurceVysledku
Špunda, Vladimír Kováč, Daniel Navrátil, M. Malenovský, Z. Urban, Otmar Štroch, Michal
n3:wos
000311751300004
s:issn
1445-4408
s:numberOfPages
12