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Reflectance continuum removal spectral index tracking the xanthophyll cycle photoprotective reactions in Norway spruce needles

Citation

Kovac, D and Navratil, M and Malenovsky, Z and Stroch, M and Spunda, V and Urban, O, Reflectance continuum removal spectral index tracking the xanthophyll cycle photoprotective reactions in Norway spruce needles, Functional Plant Biology: An International Journal of Plant Function, 39, (12) pp. 987-998. ISSN 1445-4408 (2012) [Refereed Article]

Copyright Statement

Copyright 2012 CSIRO

DOI: doi:10.1071/FP12107

Abstract

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).

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Plant Biology
Research Field:Plant Physiology
Objective Division:Environment
Objective Group:Flora, Fauna and Biodiversity
Objective Field:Flora, Fauna and Biodiversity of environments not elsewhere classified
Author:Malenovsky, Z (Dr Zbynek Malenovsky)
ID Code:81682
Year Published:2012
Web of Science® Times Cited:3
Deposited By:Geography and Environmental Studies
Deposited On:2012-12-21
Last Modified:2017-11-02
Downloads:0

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