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@article{1648917,
author = {Maskova, P. and Radochova, B. and Lhotakova, Z. and Michálek, Jan and Lipavska, H.},
article_location = {Ottawa},
article_number = {11},
doi = {http://dx.doi.org/10.1139/cjfr-2017-0083},
keywords = {chloroplast ultrastructure; CO2 enrichment; forest trees; soluble carbohydrates; starch},
language = {eng},
issn = {0045-5067},
journal = {Canadian journal of forest research.},
title = {Nonstructural carbohydrate-balance response to long-term elevated CO2 exposure in European beech and Norway spruce mixed cultures: biochemical and ultrastructural responses},
url = {https://doi.org/10.1139/cjfr-2017-0083},
volume = {47},
year = {2017}
}
TY - JOUR
ID - 1648917
AU - Maskova, P. - Radochova, B. - Lhotakova, Z. - Michálek, Jan - Lipavska, H.
PY - 2017
TI - Nonstructural carbohydrate-balance response to long-term elevated CO2 exposure in European beech and Norway spruce mixed cultures: biochemical and ultrastructural responses
JF - Canadian journal of forest research.
VL - 47
IS - 11
SP - 1488-1494
EP - 1488-1494
PB - The national research council
SN - 00455067
KW - chloroplast ultrastructure
KW - CO2 enrichment
KW - forest trees
KW - soluble carbohydrates
KW - starch
UR - https://doi.org/10.1139/cjfr-2017-0083
L2 - https://doi.org/10.1139/cjfr-2017-0083
N2 - Two dominant central European tree species (Fagus sylvatica L. and Picea abies (L.) Karst.), in a mixed culture in semi-open glass domes, were used to simulate the reaction of forests to long-term elevated CO2 (EC) in a mountainous area (Beskydy Mountains, the Czech Republic). We investigated the effects of EC on soluble carbohydrate levels and composition. Starch content was evaluated using two methods: biochemical (glucose content after enzymatic hydrolysis) and stereological (starch grain proportion, size, and number in chloroplasts). In beech and spruce foliage, no significant changes in total soluble carbohydrate levels were observed. In spruce, starch content determined biochemically increased under EC, whereas no changes were detected in beech. The starch content determined stereologically increased only in beech. In spruce, EC exposure caused comparable starch increases in current-year and previous-year needles, although the former had a higher starch content and numerous larger starch grains regardless of CO2 concentration. In both species, the biochemical determination of carbohydrates exhibited greater individual tree uniformity, in contrast to large intraspecies variability. No changes in leaf soluble carbohydrates under long-term elevated CO2 demonstrate the ability of the studied tree species to efficiently allocate the photosynthates among the sinks. Thus, no photosynthetic downregulation via carbohydrate-level signalling can be expected.
ER -
MASKOVA, P., B. RADOCHOVA, Z. LHOTAKOVA, Jan MICHÁLEK and H. LIPAVSKA. Nonstructural carbohydrate-balance response to long-term elevated CO2 exposure in European beech and Norway spruce mixed cultures: biochemical and ultrastructural responses. \textit{Canadian journal of forest research.}. Ottawa: The national research council, 2017, vol.~47, No~11, p.~1488-1494. ISSN~0045-5067. Available from: https://dx.doi.org/10.1139/cjfr-2017-0083.
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