Heterotrophy in the Lemnaceae

Frick, Hugh

doi:10.1016/s0176-1617(11)80542-0

Cited by 23 publications

(21 citation statements)

References 12 publications

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“…Plants grown on nutrient media containing sucrose depend on light intensity less than plants grown on media containing mineral nutrients only. It has been shown previously that sucrose supply decreased photosynthetic performance, probably because it provides enough energy for other metabolic activities thus supporting heterotrophic and photomixotrophic growth (FRICK 1994, JO et al 2009 and references therein). This is in agreement with the slight increase of photosynthetic performance in duckweed grown under low light intensity (50 mmol PHOTONS m -2 s -1 ) on media containing mineral nutrients only (ARTETXE et al 2002) when compared with values we obtained on medium containing sucrose.…”

Section: Discussionmentioning

confidence: 92%

“…Bristol's, Hunter's, Hoagland's and Schenk and Hildebrandt's (WANG 1990, LEWIS 1995, ZHANG et al 2010. Besides mineral elements, some nutrient media contain organic compounds, usually amino acids and carbohydrates (WANG 1990, FRICK 1994, TKALEC et al 2007. Depending on the concentration, organic substances can stimulate plant growth but also can cause osmotic stress and down-regulation of photosynthesis (HDIDER andDESJARDINS 1994, BALEN et al 2012, and references therein).…”

Section: Introductionmentioning

confidence: 99%

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Growth and photosynthesis of Lemna minor L. exposed to different light conditions and sucrose supplies

Vidaković-Cifrek

Sorić²,

Babić

2013

Acta Botanica Croatica

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-Duckweed (Lemna minor L.) is a model plant suitable for investigation into plant physiology, biochemistry and ecotoxicology. Depending on the type of the experiment, duckweed is cultivated on different nutrient media under various chamber conditions. In our work, duckweed was cultivated on Pirson-Seidel's nutrient solution supplemented with 5, 7.5 or 10 g L -1 sucrose under cool white (CW) or Gro-Lux (GL) light sources. When different light sources and sucrose supplies are compared, a significant stimulative effect of GL light on duckweed grown on 7.5 and 10 g L -1 sucrose was seen to start on day 9. Considering photosynthetic performance the results showed that there were no significant differences in maximum quantum yield of PSII (F v /F m ) after 7 and 16 days of exposure, regardless of light source and sucrose supply. Effective quantum yield of PSII (F PSII ) decreased only after 16 days of exposure to 5 g L -1 sucrose under CW light. The higher growth rate and photosynthetic performance in plants exposed to GL light is a consequence of its spectral distribution resembling the action spectrum of photosynthesis. Furthermore, enhanced growth noticed in plants cultivated on higher sucrose contents (7.5 and 10 g L -1 ) indicated the promotive effect of sucrose in plants grown under low light conditions.

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Section: Discussionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Growth and photosynthesis of Lemna minor L. exposed to different light conditions and sucrose supplies

Vidaković-Cifrek

Sorić²,

Babić

2013

Acta Botanica Croatica

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“…At the same time, the content of free sugar was very low: the portion of anomers of fructose, glucose, and sucrose accounted for only 4.7% of TIC. Literature data concerning nutrient levels in other duckweeds showed that Lemna minor, Lemna gibba, and Lemna trisulca contain low concentrations of soluble carbohydrates and large amounts of nonstructural polysaccharides (Frick 1994). The group of miscellaneous compounds is represented mainly by phosphoric acid, as well as small amounts of inositol and its phosphate.…”

Section: Resultsmentioning

confidence: 99%

Gas chromatographic-mass spectrometric investigation of the chemical composition of the aquatic plant Wolffia arrhiza (Lemnaceae)

Kotowska

Piotrowska

Isidorova

et al. 2013

Oceanological and Hydrobiological Studies

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The ether and methanol extracts of Wolffia arrhiza (Lemnaceae) were analyzed using high resolution capillary gas chromatography coupled with mass spectrometry (GC-MS). The ether extract contains 32 compounds, mostly lipids and sterols, among which β-sitosterol is most prevalent. This is the first evidence of β-sitosterol detection in W. arrhiza. The most representative group of polar compounds of the methanol fraction is formed by 18 free amino acids. In addition, in the methanol extract there are a number of other nitrogen containing compounds: nucleobase and nucleosides. The third significant group in the total ion current in the methanol extract is formed by glycerol and glycerides. At the same time, the content of free sugar is very low.

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“…It has been revealed that adding BS extract to the water results in an increase of dissolved organic carbon concentrations (Pęczuła, 2013). Consequently, this may lead to favouring the habitat conditions for duckweed growth, as some Lemna species do uptake organic compounds (Gorham, 1950;Frick, 1994). On the other hand, phenolic substances are regarded as the main algistatic chemicals leached from rotting BS (Everall and Lees, 1997;Murray et al, 2010), and some of these are also identified as inhibitors of Lemna growth (Toro et al, 1988).…”

Section: Introductionmentioning

confidence: 99%

The influence of barley straw extract addition on the growth of duckweed (Lemna valdivianaPhil.) under laboratory conditions

Pęczuła

Suchora

2014

Knowl. Managt. Aquatic Ecosyst.

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Key-words:duckweed, aquatic weed management, invasive species, barley straw extract, growth inhibition Due to its ability to forming dense mats in small waterbodies, duckweeds are often considered as nuisance plants in some freshwaters. Up to now, few techniques had been tested aiming towards managing duckweeds, but all of them had appeared to have some disadvantages. As an attempt to find a new effective management tool, a laboratory experiment assessing the influence of barley straw (BS) extract addition -a substance used in algal bloom control, upon the growth of the duckweed Lemna valdiviana, was performed. Reaction on two various concentrations of BS extract were quantified by measurements of changes in duckweed biomass and root length. The results showed that plants which have received the extract increased their biomass slower than that of the control, however only those with the addition of smaller amounts of BS differed significantly from the controls. Furthermore, BS addition stimulated the root growth in both experimental tanks. This implies that the mean roots length was higher, although the statistical differences were insignificant. As possible explanation for the observed changes we suggest that: (1) the growth inhibition of Lemna valvidiana under exposition to BS extract might be induced by an uptake of organic compounds from which some (phenolic substances) are (probably) toxic; (2) Grâce à leur capacité à former des tapis denses dans les petits plans d'eau, les lentilles d'eau sont souvent considérées comme des plantes nuisibles dans certaines eaux douces. Jusqu'à maintenant, quelques techniques ont été testées visant à gérer les lentilles d'eau, mais toutes ont semblé avoir quelques inconvénients. Comme tentative à trouver un nouvel outil de gestion efficace, une expé-rience de laboratoire évaluant l'influence d'addition d'extrait de paille d'orge (BS), une substance utilisée dans le contrôle de la prolifération des algues, sur la croissance de la lentille d'eau Lemna valdiviana, a été réalisée. La réaction à deux différentes concentrations d'extrait de BS a été quantifiée par des mesures de l'évolution de la biomasse et la longueur des racines de la lentille d'eau. Les résul-tats ont montré que les plantes qui ont reçu l'extrait ont augmenté leur biomasse inhibition de la croissance plus lentement que celle du témoin, mais seules celles avec l'addition de petites quantités de BS différaient significativement des témoins. Par ailleurs, l'addition de BS a stimulé la croissance des racines : dans les deux bassins expérimentaux. Ceci implique que la longueur moyenne des racines était plus élevée, bien que les différences statistiques aient été insignifiantes. Comme explication possible pour les changements observés, nous suggérons que : (1) l'inhibition de la croissance de Lemna valvidiana sous exposition à l'extrait de BS peut être induite par une absorption de composés organiques dont certains (substances phénoliques) sont (probablement) toxiques ; (2) des interactions concurrentielle...

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Heterotrophy in the Lemnaceae

Cited by 23 publications

References 12 publications

Growth and photosynthesis of Lemna minor L. exposed to different light conditions and sucrose supplies

Growth and photosynthesis of Lemna minor L. exposed to different light conditions and sucrose supplies

Gas chromatographic-mass spectrometric investigation of the chemical composition of the aquatic plant Wolffia arrhiza (Lemnaceae)

The influence of barley straw extract addition on the growth of duckweed (Lemna valdivianaPhil.) under laboratory conditions

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