When the Mediterranean becomes harsh: Heat pulses strongly affect C allocation in plant-soil-atmosphere continuum in Eucalyptus camaldulensis
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F19%3A00507742" target="_blank" >RIV/86652079:_____/19:00507742 - isvavai.cz</a>
Result on the web
<a href="https://reader.elsevier.com/reader/sd/pii/S0098847218316563?token=AE7EB4F6FEADECE14B89968B813A299664EEF4A782FE7679CE45EC56CF4A2574BA50548661B927D35B5A1EEE0D585B29" target="_blank" >https://reader.elsevier.com/reader/sd/pii/S0098847218316563?token=AE7EB4F6FEADECE14B89968B813A299664EEF4A782FE7679CE45EC56CF4A2574BA50548661B927D35B5A1EEE0D585B29</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.envexpbot.2019.02.019" target="_blank" >10.1016/j.envexpbot.2019.02.019</a>
Alternative languages
Result language
angličtina
Original language name
When the Mediterranean becomes harsh: Heat pulses strongly affect C allocation in plant-soil-atmosphere continuum in Eucalyptus camaldulensis
Original language description
Mediterranean vegetation is frequently subjected to the heat waves with temperature peaks exceeding 45 degrees C. While the effects of drought on assimilates allocation are deeply studied, little information is available regarding the effects of the acute heat stress on this aspect of the plant physiology. We evaluated the effects of acute heat pulses on plant C internal allocation in Eucalyptus camaldulensis saplings and its transfer into the soil. Shoots of Eucalyptus were subjected to an increase of the air temperatures up to 45 degrees C. Allocation of C was inferred after pulse labelling of heated and non-heated shoots with (CO2)-C-13 . Heat pulse lowered the photosynthesis and almost tripled the C losses from shoots through respiration. Assimilated C-13 was preferentially allocated to leaf soluble sugar fractions rather than to starch. Heat pulse interrupted C-13 allocation to the trunk, roots and soil. C-13 allocation to new non labelled leaves was detected in some replicate plants, independently of treatment, suggesting that this process is sink-driven. Although, shoots subjected to the heat pulse modified allocation strategy, 'saving' assimilated C-13 at a leaf level, the rate of C-13 involvement in shoot respiration was restricted by photosynthetic rates measured during the labelling. The results suggest that photosynthetic and non-photosynthetic organs may be constrained to rely on C reserves under elevated temperatures with further negative consequences for C balance in case the duration and frequency of the heat waves will increase as projected by climate change.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10611 - Plant sciences, botany
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Environmental and Experimental Botany
ISSN
0098-8472
e-ISSN
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Volume of the periodical
162
Issue of the periodical within the volume
jun
Country of publishing house
GB - UNITED KINGDOM
Number of pages
11
Pages from-to
181-191
UT code for WoS article
000467507700018
EID of the result in the Scopus database
2-s2.0-85062228379