Physiological characterisation of aquatic traps in the epiphytic carnivorous plant Utricularia humboldtii

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985939%3A_____%2F24%3A00602123" target="_blank" >RIV/67985939:_____/24:00602123 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.2298/BOTSERB2402309A" target="_blank" >https://doi.org/10.2298/BOTSERB2402309A</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2298/BOTSERB2402309A" target="_blank" >10.2298/BOTSERB2402309A</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Physiological characterisation of aquatic traps in the epiphytic carnivorous plant Utricularia humboldtii

Popis výsledku v původním jazyce

The suction traps of aquatic Utricularia species are discoid bladders, 1-6 mm long, with their lumen isolated by a mobile trapdoor from the ambient medium. Water is pumped out of the traps to maintain the negative pressure in the reset traps. When a prey animal touches the sensory hairs on the trapdoor it opens, the ambient water along with the prey is sucked inside and the trapdoor is closed again. Utricularia humboldtii is a robust, semiaquatic-epiphytic or terrestrial species from the generic section Orchidioides from South America. The efficiency of its aquatic traps was measured based on trap firing and resetting rates as well as changes in trap thickness due to both mechanically stimulated and spontaneous firings using an electronic sensor. The U. humboldtii traps exhibit-ed relatively low firing and resetting rates. These values are 2 to 20 times lower than those in other aquatic Utricularia species reported in the literature. These results together with the low aerobic respiration rate of sliced traps indicate that the less efficient aquatic traps in U. humboldtii are specialised for catching fine prey items in bromeliad water tanks. A marked lag-period in trap resetting was found to occur during the first 30 min after firing, contradicting the accepted concept of continuous water pumping. Spontaneous trap firings were also observed with the same magnitude as that in stimulated firings. This implies that spontaneous firings occur consistently in all the tested aquatic Utriculariaspecies. However, although they relate to the continuous water pumping mechanism of the traps, their physiological importance has not been fully elucidated.

Název v anglickém jazyce

Physiological characterisation of aquatic traps in the epiphytic carnivorous plant Utricularia humboldtii

Popis výsledku anglicky

The suction traps of aquatic Utricularia species are discoid bladders, 1-6 mm long, with their lumen isolated by a mobile trapdoor from the ambient medium. Water is pumped out of the traps to maintain the negative pressure in the reset traps. When a prey animal touches the sensory hairs on the trapdoor it opens, the ambient water along with the prey is sucked inside and the trapdoor is closed again. Utricularia humboldtii is a robust, semiaquatic-epiphytic or terrestrial species from the generic section Orchidioides from South America. The efficiency of its aquatic traps was measured based on trap firing and resetting rates as well as changes in trap thickness due to both mechanically stimulated and spontaneous firings using an electronic sensor. The U. humboldtii traps exhibit-ed relatively low firing and resetting rates. These values are 2 to 20 times lower than those in other aquatic Utricularia species reported in the literature. These results together with the low aerobic respiration rate of sliced traps indicate that the less efficient aquatic traps in U. humboldtii are specialised for catching fine prey items in bromeliad water tanks. A marked lag-period in trap resetting was found to occur during the first 30 min after firing, contradicting the accepted concept of continuous water pumping. Spontaneous trap firings were also observed with the same magnitude as that in stimulated firings. This implies that spontaneous firings occur consistently in all the tested aquatic Utriculariaspecies. However, although they relate to the continuous water pumping mechanism of the traps, their physiological importance has not been fully elucidated.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10611 - Plant sciences, botany

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Botanica Serbica

ISSN

1821-2158

e-ISSN

1821-2638

Svazek periodika

48

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

RS - Srbská republika

Počet stran výsledku

6

Strana od-do

309-314

Kód UT WoS článku

001348261600018

EID výsledku v databázi Scopus

2-s2.0-85207361907