biologia plantarum

International journal on Plant Life established by Bohumil Němec in 1959

Biologia plantarum 55:581-585, 2011 | DOI: 10.1007/s10535-011-0130-7

Fatty acid content during reconstitution of the photosynthetic apparatus in the air-dried leaves of Xerophyta scabrida after rehydration

K. Georgieva1,*, A. Ivanova1, S. Doncheva1, S. Petkova1, D. Stefanov1, E. Péli2, Z. Tuba2,3
1 Acad. M. Popov Institute of Plant Physiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
2 Plant Ecological Research Group of Hungarian Academy of Sciences, Godollo, Hungary
3 Institute of Botany and Ecophysiology, Szent István University, Gödöllő, Hungary

Desiccation of Xerophyta scabrida caused considerable damage of chloroplast ultrastructure together with a complete loss of chlorophyll. Upon rehydration, the relative water content of the pale-green leaves almost reached that of the dark-green ones, however, the Chl content and photosynthetic activity remained lower. The process of reconstitution of the photosynthetic apparatus in the re-greening leaves was accompanied by changes in fatty acid (FA) content. The amount of the FA methyl esters was more than 2-fold higher in the green leaves as compared to the dry ones and slightly increased after rehydration in the pale-green leaves. Among the three main fatty acids in the leaves, oleic, palmitic and linoleic acid, the latter increased more than 3-fold during rehydration. This acid is concentrated mainly in the glycolipids and this was an indirect indication for the restoration of the photosynthetic apparatus. Our results showed that rehydration of X. scabrida led to a decrease of the saturated FA in parallel with an increase of the unsaturated FA, thus indicating increased membrane permeability. The observed changes in the lipid content can be considered as a characteristic feature of X. scabrida and most probably of other poikilochlorophyllous species.

Keywords: resurrection plants; chlorophyll fluorescence; chloroplast ultrastructure; oxygen evolution

Received: November 24, 2009; Accepted: May 15, 2010; Published: September 1, 2011  Show citation

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Georgieva, K., Ivanova, A., Doncheva, S., Petkova, S., Stefanov, D., Péli, E., & Tuba, Z. (2011). Fatty acid content during reconstitution of the photosynthetic apparatus in the air-dried leaves of Xerophyta scabrida after rehydration. Biologia plantarum, 55(3), 581-585. doi: 10.1007/s10535-011-0130-7
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