Micronutrient tolerance and accumulation in the duckweed,<i>Lemna.</i>

Frick, Hugh

doi:10.1080/01904168509363412

Cited by 14 publications

(6 citation statements)

References 12 publications

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“…These investigations, which have focused primarily on the uptake and utilization of amino acids, nitrate, nitrite and ammonia (Tridech et al, 1981;Datka & Mudd, 1985;Ben-Izhak Monselise et al, 1987;Brunk & Rhodes, 1988), clearly demonstrate a high assimilative capacity. Similar results have been reported for other nutrients including phosphates and trace minerals (Culley et al, 1981;Frick, 1985). Furthermore, assimilation is rapid; radiolabelled amino acids placed in the medium appear in mature proteins in less than 2 min (Greenberg et al, 1987).…”

Section: Culture Conditionssupporting

confidence: 73%

“…Interestingly, this level is about tenfold greater than the highest values reported for other higher plants (Edwards, 1983). Lemna also has a high uptake capacity for ionic contaminants including metals (Ti, Cu, Sr, Zn, Mo, As) in both field and laboratory situations (Mangi et al, 1978;Rodgers et al, 1978;Clark et al, 1981;Frick, 1985). Once again, assimilation is rapid; metals can equilibrate in Lemna within hours (Clark et al, 1981;Muir et al, 1985).…”

Section: Culture Conditionsmentioning

confidence: 89%

“…Because the Lernnaceae rapidly assimilate exogenous chemical, they have been found to be a sensitive indicator of herbicide strength (Damanakis, 1970;Mattoo et al, 1984;Hughes et al, 1988). The toxicity of heavy metals has also been studied extensively with Lemna, with the interesting result that the plants are relatively resistant to these elements (Mangi et al, 1978;Rodgers et al, 1978;Clark et al, 1981;Frick, 1985).…”

Section: Toxicity Assessmentmentioning

confidence: 99%

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Applications of the aquatic higher plant Lemna gibba for ecotoxicological assessment

Greenberg

Huang

Dixon

1992

Journal of Aquatic Ecosystem Health

104

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Although higher plants represent a significant portion of the total biomass in some aquatic environments, their use in ecosystem evaluation has lagged behind that of other organisms. This is partly due to a lack of convenient aquatic higher plant systems that can be employed for ecotoxicological assessment. However, the aquatic C-3 monocot Lemna gibba has many attributes that makes it useful for ecosystem health assessment. In this report, using examples from the literature and our research, some of the applications Lemna has for environmental research are discussed. Toxicant impacts on Lemna can be readily assessed in terms of growth; the plants multiply quickly and changes in biomass (which doubles approximately every 2 days) can be accurately measured by counting leaves. The plants are small, allowing for simultaneous multiple replication. The small size also makes the lighting conditions easy to control; sunlight can be accurately simulated and specific spectral regions can be enhanced or deleted. Lemna is amenable to in vivo chlorophyll and photosynthesis assays, which make excellent companion endpoints for growth. The plants assimilate chemicals directly from the growth medium, facilitating controlled toxicant application. Furthermore, Lernna has a high bioconcentration capacity, indicating a potential for use in bioremediation technologies.

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Section: Culture Conditionssupporting

confidence: 73%

Section: Culture Conditionsmentioning

confidence: 89%

Section: Toxicity Assessmentmentioning

confidence: 99%

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Applications of the aquatic higher plant Lemna gibba for ecotoxicological assessment

Greenberg

Huang

Dixon

1992

Journal of Aquatic Ecosystem Health

104

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“…During the experiment, the composition of the growing medium and the accumulation of elements was monitored. These conditions are summarised in Table 2, along with the optimal and maximal growing ranges for duckweed found in the literature [13,29]. When a certain component is within the optimal range, the growth will be optimal; when it is outside the maximal growing range, duckweed growth is theoretically impossible.…”

Section: Medium Composition and Accumulation Of Elementsmentioning

confidence: 99%

Lemna minor Cultivation for Treating Swine Manure and Providing Micronutrients for Animal Feed

Devlamynck

Souza

Leenknegt

et al. 2021

Plants

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The potential of Lemna minor to valorise agricultural wastewater into a protein-rich feed component to meet the growing demand for animal feed protein and reduce the excess of nutrients in certain European regions was investigated. Three pilot-scale systems were monitored for nine weeks under outdoor conditions in Flanders. The systems were fed with a mixture of the liquid fraction and the biological effluent of a swine manure treatment system diluted with rainwater in order that the weekly N and P addition was equal to the N and P removal by the system. The design tested the accumulation of elements in a continuous recirculation system. Potassium, Cl, S, Ca, and Mg were abundantly available in the swine manure wastewaters and tended to accumulate, being a possible cause of concern for long-operating recirculation systems. The harvested duckweed was characterised for its mineral composition and protein content. In animal husbandry, trace elements are specifically added to animal feed as micronutrients and, thus, feedstuffs biofortified with essential trace elements can provide added value. Duckweed grown on the tested mixture of swine manure waste streams could be considered as a source of Mn, Zn, and Fe for swine feed, while it is not a source of Cu for swine feed. Moreover, it was observed that As, Cd, and Pb content were below the limits of the feed Directive 2002/32/EC in the duckweed grown on the tested medium. Overall, these results demonstrate that duckweed can effectively remove nutrients from agriculture wastewaters in a recirculated system while producing a feed source with a protein content of 35% DM.

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“…During the entire growing season, the influent concentrations of the three cubicontainer cascades were determined. The results are summarized in Table 1, along with the optimal and maximal growing ranges found in the literature [11,36]. When a certain component is within the optimal ranges, the growth will be optimal; when it is outside the maximal growing range, then duckweed growth is theoretically impossible.…”

Section: Composition Of the Growing Mediamentioning

confidence: 99%

Agronomic and Environmental Performance of Lemnaminor Cultivated on Agricultural Wastewater Streams—A Practical Approach

et al. 2021

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This study investigated the potential of Lemna minor to valorise agricultural wastewater in protein-rich feed material in order to meet the growing demand for animal feed protein and reduce the excess of nutrients in certain European regions. For this purpose, three pilot-scale systems were monitored for 175 days under outdoor conditions in Flanders. The systems were fed with the effluent of aquaculture (pikeperch production—PP), a mixture of diluted pig manure wastewater (PM), and a synthetic medium (SM). PM showed the highest productivity (6.1 ± 2.5 g DW m−2 d−1) and N uptake (327 ± 107 mg N m−2 d−1). PP yielded a similar productivity and both wastewaters resulted in higher productivities than SM. Furthermore, all media showed similar P uptake rates (65–70 P m−2 d−1). Finally, duckweed had a beneficial amino acid composition for humans (essential amino acid index = 1.1), broilers and pigs. This study also showed that the growing medium had more influence on the productivity of duckweed than on its amino acid composition or protein content, with the latter being only slightly affected by the different media studied. Overall, these results demonstrate that duckweed can effectively remove nutrients from agriculture wastewaters while producing quality protein.

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Micronutrient tolerance and accumulation in the duckweed,Lemna.

Cited by 14 publications

References 12 publications

Applications of the aquatic higher plant Lemna gibba for ecotoxicological assessment

Applications of the aquatic higher plant Lemna gibba for ecotoxicological assessment

Lemna minor Cultivation for Treating Swine Manure and Providing Micronutrients for Animal Feed

Agronomic and Environmental Performance of Lemnaminor Cultivated on Agricultural Wastewater Streams—A Practical Approach

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