Effects of NH4+ concentration on growth, morphology and NH4+ uptake kinetics of Salvinia natans

Jampeetong, Arunothai; Brix, Hans

doi:10.1016/j.ecoleng.2008.11.006

Cited by 70 publications

(35 citation statements)

References 40 publications

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“…concentrations up to 5 mM NH 4 ? but at higher concentrations its growth was suppressed as also found in other aquatic macrophytes (Jampeetong and Brix 2009;Wang et al 2009;Cao et al 2009a, b). At high NH 4 ?…”

Section: Discussionmentioning

confidence: 81%

“…At high NH 4 ? concentrations, the growth of most aquatic species was stunted, especially the roots (Kitoh et al 1993;Britto and Kronzucker 2002;Berg et al 2005;Jampeetong and Brix 2009;Cao et al 2009a, b). At the NH 4 ?…”

Section: Discussionmentioning

confidence: 94%

“…Different letters above columns indicate significant differences between treatments ? toxicity in the sensitive species (Jampeetong and Brix 2009). In the present study, the NH 4 ?…”

Section: Discussionmentioning

confidence: 99%

“…Under NH 4 ? stress, most plants showed slow growth rates, low root:shoot ratios, and occasionally had rotted roots and stems with chlorosis in old leaves (Britto and Kronzucker 2002;Tylova et al 2008;Jampeetong and Brix 2009). Thus, NH 4 ?…”

Section: Introductionmentioning

confidence: 99%

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Growth, morphology, ammonium uptake and nutrient allocation of Myriophyllum brasiliense Cambess. under high NH4 + concentrations

2011

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The effects of high NH(4)(+) concentration on growth, morphology, NH(4) (+) uptake and nutrient allocation of Myriophyllum brasiliense were investigated in hydroponic culture. The plants were grown under greenhouse conditions for 4 weeks using four levels of NH(4)(+) concentration: 1, 5, 10 and 15 mM. M. brasiliense grew well with a relative growth rate of c.0.03 day(-1) at NH(4)(+) concentration up to 5 mM. At the higher NH(4)(+) concentrations the growth of the plants was stunted and the plants had short roots and few new buds, especially when grown in 15 mM NH(4)(+) where the submerged leaves were lost and there were rotten roots and submerged stems. To avoid NH(4)(+) toxicity, the plants may have a mechanism to prevent cytoplasmic NH(4)(+) accumulation in plant cells. The net uptake of NH(4)(+) significantly decreased and the total N significantly increased in the plants treated with 10 and 15 mM NH(4)(+), respectively. The plant may employ NH(4)(+) assimilation and extrusion as a mechanism to compensate for the high NH(4)(+) concentrations. However, the plants may show nutrient deficiency symptoms, especially K deficiency symptoms, after they were exposed to NH(4)(+) concentration higher than 10 mM. The present study provides a basic ecophysiology of M. brasiliense that it can grow in NH(4)(+) enriched water up to concentrations as high as 5 mM.

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Section: Discussionmentioning

confidence: 81%

Section: Discussionmentioning

confidence: 94%

“…Different letters above columns indicate significant differences between treatments ? toxicity in the sensitive species (Jampeetong and Brix 2009). In the present study, the NH 4 ?…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Growth, morphology, ammonium uptake and nutrient allocation of Myriophyllum brasiliense Cambess. under high NH4 + concentrations

2011

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“…minor relative growth rate (RGR) (g g −1 day −1 ) was calculated by the following formula: RGR = (ln W2 − ln W1)/t, where W1 and W2 are the initial and final FW (g), and t is the experimental time (days) (Jampeetong and Brix, 2009). …”

Section: Culture Preparation and Application Of Crude Oilmentioning

confidence: 99%

Evaluation of the phytoremediation capacity of Lemna minor L. incrude oil spiked cultures

Kösesakal¹,

Ünlü²,

Külen³

et al. 2015

Turk J Biol

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Phytoremediation of freshwater contaminated with crude oil is a technology that can restore damaged freshwater areas. Lemna minor is a small vascular plant that reproduces rapidly, is sensitive to a wide variety of pollutants, and is easy to culture. This study aimed to evaluate the phytoremediation capacity of L. minor in crude oil spiked cultures. Cultivation was carried out for 7 days in a greenhouse with a natural photoperiod and in nutrient solutions containing 0.5%, 1%, 2%, and 3% crude oil. Extracts were analyzed using GC/MS and synchronous UV fluorescence spectroscopy. After a week of cultivation, the fresh weight of plants in the control medium increased by 117%. The presence of crude oil up to 0.5% v/v reduced growth as much as 50% relative to the control plants. C 17 / Pr and C 18 /Ph ratios decreased especially in the presence of 0.5% to 2% v/v crude oil in the growth media. In 0.5% oil concentrations, both unplanted control samples and plant samples contained no 1-4 ring polycyclic aromatic hydrocarbons. However, at oil applications of 0.5% and 1%, the plant samples contained 5 ring polycyclic aromatic hydrocarbons; their intensity was approximately two times lower than that of the unplanted control samples. It can be concluded that the biodegradation potential of L. minor strongly depends on the concentration of crude oil contaminants. Finally, the phytoremediative capacity of L. minor is only suitable for cleaning of freshwater resources containing small amounts of oil contaminants.

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Growing Azolla to produce sustainable protein feed: the effect of differing species and CO₂ concentrations on biomass productivity and chemical composition

et al. 2018

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BACKGROUNDSince available arable land is limited and nitrogen fertilizers pollute the environment, cropping systems ought to be developed that do not rely on them. Here we investigate the rapidly growing, N2‐fixing Azolla/Nostoc symbiosis for its potential productivity and chemical composition to determine its potential as protein feed.RESULTSIn a small production system, cultures of Azolla pinnata and Azolla filiculoides were continuously harvested for over 100 days, yielding an average productivity of 90.0–97.2 kg dry weight (DW) ha−1 d−1. Under ambient CO2 levels, N2 fixation by the fern's cyanobacterial symbionts accounted for all nitrogen in the biomass. Proteins made up 176–208 g kg−1 DW (4.9 × total nitrogen), depending on species and CO2 treatment, and contained more essential amino acids than protein from soybean. Elevated atmospheric CO2 concentrations (800 ppm) significantly boosted biomass production by 36–47%, without decreasing protein content. Choice of species and CO2 concentrations further affected the biomass content of lipids (79–100 g kg−1 DW) and (poly)phenols (21–69 g kg−1 DW).CONCLUSIONSBy continuous harvesting, high protein yields can be obtained from Azolla cultures, without the need for nitrogen fertilization. High levels of (poly)phenols likely contribute to limitations in the inclusion rate of Azolla in animal diets and need further investigation. © 2018 The Authors. Journal of the Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

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Effects of NH4+ concentration on growth, morphology and NH4+ uptake kinetics of Salvinia natans

Cited by 70 publications

References 40 publications

Growth, morphology, ammonium uptake and nutrient allocation of Myriophyllum brasiliense Cambess. under high NH4 + concentrations

Growth, morphology, ammonium uptake and nutrient allocation of Myriophyllum brasiliense Cambess. under high NH4 + concentrations

Evaluation of the phytoremediation capacity of Lemna minor L. incrude oil spiked cultures

Growing Azolla to produce sustainable protein feed: the effect of differing species and CO₂ concentrations on biomass productivity and chemical composition

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Effects of NH4+ concentration on growth, morphology and NH4+ uptake kinetics of Salvinia natans

Cited by 70 publications

References 40 publications

Growth, morphology, ammonium uptake and nutrient allocation of Myriophyllum brasiliense Cambess. under high NH4 + concentrations

Growth, morphology, ammonium uptake and nutrient allocation of Myriophyllum brasiliense Cambess. under high NH4 + concentrations

Evaluation of the phytoremediation capacity of Lemna minor L. incrude oil spiked cultures

Growing Azolla to produce sustainable protein feed: the effect of differing species and CO2 concentrations on biomass productivity and chemical composition

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Product

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About

Growing Azolla to produce sustainable protein feed: the effect of differing species and CO₂ concentrations on biomass productivity and chemical composition