Special issue in honour of Prof. Reto J. Strasser - Analysis of K- and L-band appearance in OJIPs in Antarctic lichensin low and high temperature
| Autor: | Miloš Barták, Y. Folgar-Cameán, Z. Kučerová, Josef Hájek, Martina Špundová, Michaela Bednaříková, Dušan Lazár |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Photosystem II Physiology Analytical chemistry Plant Science Photosynthesis 01 natural sciences thermal stability transient lcsh:Botany Usnea antarctica Lichen Chlorophyll fluorescence photosynthesis biology Chemistry photosystem ii 04 agricultural and veterinary sciences biology.organism_classification lcsh:QK1-989 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Dermatocarpon polyphyllizum conductivity Xanthoria elegans 010606 plant biology & botany |
| Zdroj: | Photosynthetica, Vol 58, Iss 2, Pp 646-656 (2020) |
| ISSN: | 1573-9058 0300-3604 |
| Popis: | In this study, we evaluated the effect of temperature on the fast chlorophyll fluorescence (ChlF) transient (OJIP) and OJIP-derived parameters in Antarctic lichens Xanthoria elegans, Usnea antarctica, and Dermatocarpon polyphyllizum. Samples were exposed to a range of temperatures (-5 to +45 degrees C) and measured after 15-min equilibration. High temperature (+45 degrees C) caused a decrease of ChlF, an increased J-step, and shortened time to reach peak ChlF (FP). Temperature below +5 degrees C caused the increase of ChlF and J-step. The K-band was identified in X. elegans (above +20 degrees C), U. antarctica (+35 degrees C), and D. polyphyllizum (+45 degrees C). L-band was well distinguishable in X. elegans (+45 degrees C). As indicated by the OJIP-derived parameters, high temperature inhibited photosystem II function. The inhibition was apparent as less effective energetic connectivity. The OJIP transients and auxiliary measurement of ChlF temperature curves suggested that X. elegans had the lowest termostability among the experimental species. |
| Databáze: | OpenAIRE |
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