Photosynthetica

, Volume 49, Issue 4, pp 515–522

The interplay of anthocyanin biosynthesis and chlorophyll catabolism in senescing leaves and the question of photosystem II photoprotection

Original Papers

DOI: 10.1007/s11099-011-0061-8

Cite this article as:
Manetas, Y. & Buschmann, C. Photosynthetica (2011) 49: 515. doi:10.1007/s11099-011-0061-8

Abstract

Fully exposed, senescing leaves of Cornus sanguinea and Parthenocissus quinquefolia display during autumn considerable variation in both anthocyanin and chlorophyll (Chl) concentrations. They were used in this study to test the hypothesis that anthocyanins may have a photoprotective function against photosystem II (PSII) photoinhibitory damage. The hypothesis could not be confirmed with field sampled leaves since maximum photochemical efficiency (Fv/Fm) of PSII was negatively correlated to anthocyanin concentration and the possible effects of anthocyanins were also confounded by a decrease in Fv/Fm with Chl loss. However, after short-term laboratory photoinhibitory trials, the percent decrease of Fv/Fm was independent of Chl concentration. In this case, a slight alleviation of PSII damage with increasing anthocyanins was observed in P. quinquefolia, while a similar trend in C. sanguinea was not statistically significant. It is inferred that the assumed photoprotection, if addressed to PSII, may be of limited advantage and only under adverse environmental conditions.

Additional keywords

anthocyanins chlorophyll fluorescence Cornus sanguinea Parthenocissus quinquefolia photoinhibition photoprotection senescence 

Abbreviations

ARI

anthocyanin reflectance index

Chl

chlorophyll

CI

chlorophyll index

F0

minimal fluorescence yield of dark-adapted state

Fm

maximum fluorescence yield of dark-adapted state

Fv

variable fluorescence

Fv/Fm

maximum photochemical efficiency of PSII

KIT

Karlsruhe Institute of Technology

LED

light-emitting diodes

NIR

near infrared reflectance

PSII

photosystem II

R

reflectance

Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  1. 1.Department of BiologyUniversity of PatrasPatrasGreece
  2. 2.Institut of BotanyUniversity of KarlsruheKarlsruheGermany

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