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Light as a factor affecting the concentration of simple organics in the traps of aquatic carnivorous Utricularia species
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SYSNO ASEP 0381666 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Light as a factor affecting the concentration of simple organics in the traps of aquatic carnivorous Utricularia species Author(s) Borovec, Jakub (BC-A) RID, ORCID
Sirová, Dagmara (BC-A) RID, ORCID
Adamec, Lubomír (BU-J) RID, ORCIDSource Title Fundamental and Applied Limnology : Archiv für Hydrobiologie - ISSN 1863-9135
Roč. 181, č. 2 (2012), s. 159-166Number of pages 8 s. Language eng - English Country DE - Germany Keywords Utricularia ; trap fluid ; organic compounds Subject RIV EF - Botanics R&D Projects GAP504/11/0783 GA ČR - Czech Science Foundation (CSF) Institutional support BC-A - RVO:60077344 CEZ AV0Z60050516 - BU-J (2005-2011) UT WOS 000308743600006 DOI https://doi.org/10.1127/1863-9135/2012/0271 Annotation Rootless aquatic carnivorous Utricularia plants exude significant amounts of photosynthates into the trap fluid, where they have been shown to support complex microbial commensal communities. Using ion chromatography, the composition of four groups of easily metabolised, carbon-rich organic compounds (sugars, sugar alcohols, amino acids and organic acids) was investigated in trap fluid collected from three aquatic Utricularia species, U. vulgaris, U. reflexa and U. stygia, for different trap ages, irradiance levels during plant growth and for exposure to periods of darkness. The total sum of the concentrations of the four groups of organic compounds in the trap fluid ranged within 14 – 42 mg/L in greenhouse-grown U. vulgaris, compared to 9.0 –14 mg/L in U. reflexa. The concentrations of organic compounds were significantly higher in younger traps than in the older traps of U. vulgaris grown at high irradiance. Within the same trap age categories in U. vulgaris, the group concentrations of sugars, organic acids, and total sums of analysed compounds were significantly higher in plants growing at high irradiance when compared with those grown in the shade. Dark exposure of cut traps for 1– 2 d significantly decreased the concentrations of sugars and organic acids in the fluid. The total sum of organic compounds in traps of U. stygia grown outdoors (78.3 +- 19.2 mg/L) was much higher than that in ‘middle aged’ traps of U. vulgaris (49.2 +- 4.2 mg/L), grown under the same conditions. It may be concluded that the concentrations of organic compounds in the trap fluid of aquatic Utricularia are species specific, subject to rapid turnover and depend significantly on various endogenous (trap age) or exogenous factors (water chemistry, irradiance). Workplace Biology Centre (since 2006) Contact Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Year of Publishing 2013
Number of the records: 1