The effects of NH4+ and NO3− on growth, resource allocation and nitrogen uptake kinetics of Phragmites australis and Glyceria maxima

Tylova-Munzarova, Edita; Lorenzen, Bent; Brix, Hans; Votrubová, Olga

doi:10.1016/j.aquabot.2005.01.006

Cited by 107 publications

(31 citation statements)

References 31 publications

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“…The NH 4 + uptake kinetic rates we determined by using stable isotopes as tracers in intact plants are lower, but within the same range to those previously determined using time course depletion experiments (Chambers et al 1998, Tylova-Munzarova et al 2005. Our parameter estimates were almost an order of magnitude lower than Romero et al (1999), which may be attributed to different Phragmites genetic lineages or differences in methodologies.…”

Section: Don Assimilationsupporting

confidence: 65%

Nitrogen Uptake by Native and Invasive Temperate Coastal Macrophytes: Importance of Dissolved Organic Nitrogen

Mozdzer

Zieman

McGlathery

2010

Estuaries and Coasts

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We investigated if the success of the invasive common reed Phragmites australis could be attributed to a competitive ability to use dissolved organic nitrogen (DON) when compared to the dominant macrophyte Spartina alterniflora in tidal wetlands. Short-term nutrient uptake experiments were performed in the laboratory on two genetic lineages of Phragmites (native and introduced to North America) and S. alterniflora. Our results provide the first evidence for direct assimilation of DON by temperate marsh plants and indicate that amino acids are assimilated intact by all plant types at similar rates. Both Phragmites lineages had significantly greater urea-N assimilation rates than S. alterniflora, and the affinity for dissolved inorganic nitrogen (DIN) species was the greatest in native Phragmites > introduced Phragmites > S. alterniflora. Field studies demonstrated uptake of both DON and DIN in similar proportion as those determined in the laboratory experiments. Based on these uptake rates, we estimate that DON has the potential to account for up to 47% of N demand for Phragmites plants, and up to 24% for S. alterniflora plants. Additionally, we suggest that differences in N uptake between native and introduced Phragmites lineages explain one mechanism for the success of the introduced type under increasingly eutrophic conditions.

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Section: Don Assimilationsupporting

confidence: 65%

Nitrogen Uptake by Native and Invasive Temperate Coastal Macrophytes: Importance of Dissolved Organic Nitrogen

Mozdzer

Zieman

McGlathery

2010

Estuaries and Coasts

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“…The direct effect of high nutrients level in water column has been suggested as an important factor in the disappearance of submerged aquatic plants from eutrophic lakes (Geneviève et al, 1997;Farnsworth and Baker, 2000), for not only the roots, but also the leaves of these plants are encompassed by water. Numerous studies have shown that excessive nitrogen (N) and phosphorus (P) compounds have strongly negative impacts on macrophytes (Robe and Griffiths, 1994;Tylová-Munzarová et al, 2005) and affect plant morphology, tissue C/N ratios, photosynthesis, density and reproductive strategy (Harlin and Thorne-Miller, 1981;Short, 1987;Sand-Jensen, 1989;van Lent et al, 1995), even though N and P are important sources of nutrition. With regard to growth, many plants show reductions under elevated ammonium-N (NH + 4 -N) concentrations and develop NH + 4 -N toxicity syndrome (Mehrer and Mohr, 1989).…”

Section: Introductionmentioning

confidence: 99%

Ecophysiological and anatomical responses ofVallisneria natansto nitrogen and phosphorus enrichment

Wang

Gao

Qin

et al. 2012

Knowl. Managt. Aquatic Ecosyst.

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Here, we describe an experiment using four nitrogen (N) and phosphorus (P) concentrations to investigate the effects of nutrient enrichment on the submersed macrophyte Vallisneria natans (tape grass) grown in a sand culture medium. The objective of this study was to examine the influence of nutrient enrichment in the water column on V. natans, especially with regard to anatomical structures. The results showed both the absolute growth rate (AGR) and intrinsic efficiency of light energy conversion of PSII (Fv/Fm) decreased with increasing nutrient levels. Root morphological characteristics, including the total root length (L), root surface area (SA), projected root area (PA), total root volume (V), average root diameter (AD), total root length per volume (LPV), total tips (T) and total forks (F), also showed a generally negative relationship with increasing nutrient concentrations. The anatomical structures of stolons and leaves also changed with nutrient enrichment. The shrinkage of aerenchyma and disappearance of starches and chloroplasts were the main structural changes leading to poor growth. These phenomena, especially the anatomical changes, might be the mechanism underlying the effect of nutrient enrichment on V. natans growth. Nous décrivons ici une expérience utilisant quatre concentrations d'azote (N) et phosphore (P) afin d'étudier les effets de l'enrichissement en éléments nutritifs sur le macrophyte immergé Vallisneria natans cultivé dans un milieu de culture sableux. L'objectif de cette étude était d'examiner l'influence de l'enrichissement en nutriments dans la colonne d'eau sur V. natans, en particulier en ce qui concerne les structures anatomiques. Les résultats ont montré à la fois que le taux de croissance absolue (AGR) et l'efficacité intrinsèque de la conversion de l'énergie lumineuse du PSII (Fv/Fm) ont diminué avec l'augmentation des niveaux d'éléments nutritifs. Les caractéristiques morphologiques racinaires, y compris la longueur totale des racines (L), la surface des racines (SA), la zone des racines prospectée (PA), le volume total des racines (V), le diamètre moyen des racines (AD), la longueur totale des racines par volume (LPV), le totalité des extrémités (T) et des ramifications (F), ont également montré une relation globalement négative avec RÉSUMÉ Réponses écophysiologiques et anatomiques de Vallisneria natans à un enrichissement en azote et en phosphore Mots

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“…Removal of NH 4 by nitrification is limited by low oxygen and therefore would be only found in the rhizosphere under rewetting. However, plants adapted to water-logged conditions favor NH 4 rather than NO À 3 as source of N supply (Marschner, 2003;Tylova-Munzarova et al, 2005). Adsorption of NH 4 on the soil surface could be another removal mechanism.…”

Section: Discussionmentioning

confidence: 98%

Natural wetland restoration and the use of municipal wastewater

Velty

Behrendt

Zeitz

2006

Z. Pflanzenernähr. Bodenk.

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SummaryThe paper deals with the rewetting of minerotrophic peat soils in lysimeters by means of purified municipal wastewater in different quantities as well as the ability of Phragmites australis to remove nutrients and to enhance wastewater "treatment". The use of purified municipal wastewater could be an alternative solution for water supply required during rewetting of peat soils. The inputs and outputs at the lysimetric systems in the Havelländisches Luch (Brandenburg) were sampled over a period of 45 months (2001)(2002)(2003)(2004) in order to determine nutrient balances. The aim was to examine potential environmental risks when using municipal wastewater for minerotrophic peat-soil rewetting as alternative for water shortage in NE Germany since addition of both N and P contribute to eutrophication but not exclusively to evaluate the purification capacity of the peat soil. Even for highest input loadings, there was no discernible discharge waterquality impact over operation time. Summary results showed high percentages of removal by plants for inorganic N, P, and micronutrients. Highest removal in soil and belowground biomass was supposed for inorganic N, P, K, Ca, Mg, and Cu.

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The effects of NH4+ and NO3− on growth, resource allocation and nitrogen uptake kinetics of Phragmites australis and Glyceria maxima

Cited by 107 publications

References 31 publications

Nitrogen Uptake by Native and Invasive Temperate Coastal Macrophytes: Importance of Dissolved Organic Nitrogen

Nitrogen Uptake by Native and Invasive Temperate Coastal Macrophytes: Importance of Dissolved Organic Nitrogen

Ecophysiological and anatomical responses ofVallisneria natansto nitrogen and phosphorus enrichment

Natural wetland restoration and the use of municipal wastewater

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