Interactive effects of N and P on growth, nutrient allocation and NH4 uptake kinetics by Phragmites australis

Romero, J.A.; Brix, Hans; Comı́n, Francisco A.

doi:10.1016/s0304-3770(99)00064-9

Cited by 78 publications

(44 citation statements)

References 21 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. The lower values reported by our study are therefore conservative estimates of plant N uptake since they measure plant assimilation, and not depletion of nutrients from the water column which may be associated with rhizosphere bacteria.…”

Section: Don Assimilationsupporting

confidence: 66%

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: 66%

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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“…Solution NO À 3 uptake was improved when plants were grown in the cold solution to obtain higher amounts of nutrients with less water absorption (Calatayud et al 2008). Romero et al (1999) reported that plant N and P concentrations generally increased with increasing N level in solutions, but not with that of P. We also found that increasing RZT enhanced N utilization and more N was absorbed by plants. For example, at the same Low-N concentration level, plant total N uptake at 20 C-RZT was increased by 47.88% compared to that at 10 C-RZT, almost equal to the total N uptake at High-N level at 10 C-RZT.…”

Section: Discussionsupporting

confidence: 55%

Effects of root-zone temperature and N, P, and K supplies on nutrient uptake of cucumber (Cucumis sativusL.) seedlings in hydroponics

Yan

Duan

Mao

et al. 2012

Soil Science and Plant Nutrition

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The nutrient uptake and allocation of cucumber (Cucumis sativus L.) seedlings at different root-zone temperatures (RZT) and different concentrations of nitrogen (N), phosphorus (P), and potassium (K) nutrients were examined. Plants were grown in a nutrient solution for 30 d at two root-zone temperatures (a diurnally Fuctuating ambient 10 C-RZT and a constant 20 C-RZT) with the aerial parts of the plants maintained at ambient temperature (10 C-30 C). Based on a Hoagland nutrient solution, seven N, P, and K nutrient concentrations were supplied to the plants at each RZT. Results showed that total plant and shoot dry weights under each nutrient treatment were significantly lower at low root-zone temperature (10 C-RZT) than at elevated root-zone temperature (20 C-RZT). But higher root dry weights were obtained at 10 C-RZT than those at 20 C-RZT. Total plant dry weights at both 10 C-RZT and 20 C-RZT were increased with increased solution N concentration, but showed different responses under P and K treatments. All estimated nutrient concentrations (N, P, and K) and uptake by the plant were obviously influenced by RZT. Low root temperature (10 C-RZT) caused a remarkable reduction in total N, P, and K uptake of shoots in all nutrient treatments, and more nutrients were accumulated in roots at 10 C-RZT than those at 20 C-RZT. N, P, and K uptakes and distribution ratios in shoots were both improved at elevated root-zone temperature (20 C-RZT). N supplies were favorable to P and K uptake at both 10 C-RZT and 20 C-RZT, with no significantly positive correlation between N and P, or N and K uptake. In conclusion, higher RZT was more beneficial to increase of plant biomass and mineral nutrient absorption than was increase of nutrient concentration. Among the three element nutrients, increasing N nutrient concentration in solution promoted better tolerance to low RZT in cucumber seedlings than increasing P and K. In addition, appropriately decreased P concentration favors plant growth.

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“…were within the previously 297 described tolerance ranges of Phragmites (Romero et al, 1999), and the amount of ammonia and sulphides in the 298 pore water of the sediment was well below toxic level (toxic levels for S -2 is ~ 2 mg l -1 , for NH4 ~10 g kg -1 ) (Kubín …”

supporting

confidence: 62%

“…Reed die-back in Europe is a thoroughly discussed topic and several causes have been proposed (Den Hartog 47 et al, 1989;Ostendorp, 1989; Crawford & Braendle, 1996;Fürtig et al, 1996;Kubín & Melzer, 1996;Brix, 1999; 48 Armstrong & Armstrong, 2001). The simultaneous and general nature of this phenomenon (many sites) indicates 49 that it could be caused by a widespread disturbance.…”

mentioning

confidence: 99%

Reed stands during different water level periods: physico-chemical properties of the sediment and growth of Phragmites australis of Lake Balaton

Tóth

2016

Hydrobiologia

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This manuscript is contextually identical with the following published paper: 26During the transition from average to low water levels, the sediment shifted from severely anoxic to poorly 27 oxidised levels, with more favourable nutrient content while the amount of ammonia and sulphides decreased, too. 28It was shown that lowering water levels could act on plants via increased redox potential of the sediment and could 29 counteract the die-back of Phragmites, suggesting the effectiveness of water level decrease as a management 30 practice to counter reed die-back. 31Keywords: redox potential, morphology, growth dynamics, carbohydrates, water level changes 32 2 Introduction 33Water depth is one of the crucial factors that controls zonation, distribution and progression of Phragmites 34 australis within lakes (Coops et al., 1996; Vretare et al., 2001;Engloner & Papp, 2006;Tóth & Szabó, 2012). 35Numerous studies have shown that, due to specific cytological and biophysical features, common reed is able to 36 tolerate high and prolonged inundation (Armstrong et al., 1994; Crawford & Braendle, 1996; Vartapetian & 37 Jackson, 1997). A continuous gas space within the plant tissue called aerenchyma runs down from the aerial to the 38 underground parts of the plant, channelling air from leaves to rhizomes and roots. This flux of atmospheric gases 39 is driven by humidity-induced partial pressure differences between the air and the substomatal space (Armstrong & Armstrong, 1991). Without it, the reed could suffer complete or partial oxygen deprivation due to high microbial 41 oxygen consumption within the sediment (Brinson et al., 1981; Crawford & Braendle, 1996). To survive anoxic 42 conditions of the sediment the air from the aerenchyma is pressurised into the sediment surrounding reed roots via 43 radial diffusion creating an oxygenated rhizosphere (Armstrong et al., 1991; Beckett et al., 2001). This mechanism 44 cannot however compensate for effects of a severe or prolonged anoxia, which causes the temporary or permanent 45 die-back of plants. 40 46Reed die-back in Europe is a thoroughly discussed topic and several causes have been proposed (Den Hartog 47 et al., 1989;Ostendorp, 1989; Crawford & Braendle, 1996;Fürtig et al., 1996;Kubín & Melzer, 1996;Brix, 1999; 48 Armstrong & Armstrong, 2001). The simultaneous and general nature of this phenomenon (many sites) indicates 49 that it could be caused by a widespread disturbance. In Lake Balaton, the process started in the 1970s (Kovács et 50 al., 1989; Virág, 1997). The die-back was similar in many cases: the stands lost their homogeneity and the 51 clumping of reed progressed with time, eventually leading to bands of clustered Phragmites at the affected sites. 52This phenomenon occurred predominantly at the maximal depth of reed penetration (i.e., at the lakeward side of 53 the stands), suggesting the importance of water depth and thus the water level fluctuation. In all cases, plant density 54 gradually decreased outside the clumps and eventually discret...

show abstract

Interactive effects of N and P on growth, nutrient allocation and NH4 uptake kinetics by Phragmites australis

Cited by 78 publications

References 21 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

Effects of root-zone temperature and N, P, and K supplies on nutrient uptake of cucumber (Cucumis sativusL.) seedlings in hydroponics

Reed stands during different water level periods: physico-chemical properties of the sediment and growth of Phragmites australis of Lake Balaton

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