Measurement of the critical negative pressure inside traps of aquatic carnivorous Utricularia species
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985939%3A_____%2F16%3A00465748" target="_blank" >RIV/67985939:_____/16:00465748 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.aquabot.2016.04.007" target="_blank" >http://dx.doi.org/10.1016/j.aquabot.2016.04.007</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.aquabot.2016.04.007" target="_blank" >10.1016/j.aquabot.2016.04.007</a>
Alternative languages
Result language
angličtina
Original language name
Measurement of the critical negative pressure inside traps of aquatic carnivorous Utricularia species
Original language description
A negative pressure of ca. -0.16 bar is formed in reset aquatic Utricularia traps, but its direct measurement is very difficult. We present a method of a gradual external application of negative pressure of -0.56 to -0.84 mbar s-1 through a fine capillary to cut off aquatic Utricularia traps to determine the critical negative pressure (CNP) at which the traps (located in air) fire and aspirate an air bubble. Using an electronic pressure sensor, we simulated the physiologically formed negative pressure needed for spontaneous trap firing in 15 aquatic Utricularia species of four generic sections. Mean CNP values ranged from -0.069 bar in giant traps of U. reflexa to -0.346 bar in U. dichotoma. The average in all 20 species or variants tested was -0.1950.018 bar, while that in 13 species or variants of the generic section Utricularia was -0.1650.015 bar and significantly differed from that of three populations of two species (U. dichotoma, U. volubilis) of the generic section Pleiochasia (-0.3350.006 bar). CNP differed significantly between giant and smaller traps of U. reflexa and young and old traps of U. vulgaris. Pooled data for 20 species or variants showed a significant negative linear correlation between trap length and CNP value. Within each species, high variability of the CNP was found: the lowest values were usually 2-3 times lower than the highest ones. This variability can represent three types of spontaneous firings described in the literature.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
EF - Botany
OECD FORD branch
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Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Aquatic Botany
ISSN
0304-3770
e-ISSN
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Volume of the periodical
133
Issue of the periodical within the volume
August 2016
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
7
Pages from-to
10-16
UT code for WoS article
000380419000002
EID of the result in the Scopus database
2-s2.0-84966457253