Effect of NH4+/NO3− availability on nitrate reductase activity and nitrogen accumulation in wetland helophytes Phragmites australis and Glyceria maxima

Munzarová, Edita; Lorenzen, Bent; Brix, Hans; Vojtíšková, Lenka; Votrubová, Olga

doi:10.1016/j.envexpbot.2004.09.011

Cited by 61 publications

(22 citation statements)

References 37 publications

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“…This characteristic is agreement with that reported in some previous studies in which the maximum instantaneous uptake rate (V max ) of NH 4 + in P. australis was much higher than that of NO 3 − (Munzarova et al 2006;Tylova-Munzarova et al 2005). In general, the enzyme expressions associated with N assimilation is influenced by N nutrition (Lam et al 1996;Sivasankar and Oaks 1996).…”

Section: N Nutritionsupporting

confidence: 90%

“…In general, the enzyme expressions associated with N assimilation is influenced by N nutrition (Lam et al 1996;Sivasankar and Oaks 1996). In P. australis, there is high expression of the enzymes required for NO 3 − assimilation (Munzarova et al 2006). Thus, the difference in the NNURs between the two treatments may have occurred before assimilation, such as in the phase in which ions are taken up by the roots or in which ions are transported from the roots to the shoots.…”

Section: N Nutritionmentioning

confidence: 99%

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Advantages of NH4 + on growth, nitrogen uptake and root respiration of Phragmites australis

Nakamura

Tsuchiya

2010

Plant Soil

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We investigated growth, N nutrition, and root respiration in Phragmites australis (Cav.) Trin. ex Steud. grown under conditions with different N sources, and evaluated the advantages of NH 4 + nutrition in relation to adaptation to anaerobic soil conditions. Hydroponics culture was carried out for 2 months under two treatment conditions with different N sources, NH 4 + and NO 3 − . The relative growth rate (RGR) of the roots, shoot and whole plant, net N uptake rate (NNUR), and root respiration rate were examined. Shoot RGR, shoot to root (S/R) ratio, and NNUR were obviously higher with the NH 4 + treatment. High S/R ratio of plants grown in the NH 4 + treatment contributed to repression of whole-root oxygen consumption. In consequence, NNUR per root respiration rate was higher with the NH 4 + treatment, which clearly suggested efficient oxygen consumption in the roots. In conclusion, higher S/R ratio due to higher NNUR enable to efficiently use oxygen for N nutrition through the repression of whole-root oxygen consumption, which is consequently achieved by NH 4 + nutrition. Therefore, we suggest that NH 4 + nutrition is indispensable for hydrophytic species growing in anaerobic soil because it enables both sufficient N nutrition and efficient oxygen consumption.

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Section: N Nutritionsupporting

confidence: 90%

Section: N Nutritionmentioning

confidence: 99%

Advantages of NH4 + on growth, nitrogen uptake and root respiration of Phragmites australis

Nakamura

Tsuchiya

2010

Plant Soil

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“…The possible reasons were that higher NR activity reduced nitrate concentration, or ammonium (NH þ 4 ) suppressed NO À 3 uptake and assimilation (Munzarova et al 2006). On the other hand, amino acid and soluble protein concentrations were increased by all treatments for Picea asperata seedlings, and by UF and WF treatments for Pinus tabulaformis seedlings.…”

Section: Discussion Effects Of Warming and Nitrogen Fertilization On mentioning

confidence: 95%

Effects of elevated temperature and nitrogen fertilization on nitrogen metabolism and nutrient status of two coniferous species

Zhao

Jin

et al. 2012

Soil Science and Plant Nutrition

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The effects of soil warming and nitrogen (N) fertilization on nitrogen metabolism and nutrient status of Picea asperata Mast. and Pinus tabulaformis Carr. seedlings were studied in this paper. Infrared heaters increased monthly average soil and air temperature by 2.6 and 2.1 C above the ambient, respectively. Ammonium nitrate (NH 4 NO 3 ) was added in an amount equivalent to an additional 25 g N m À2 a À1. Interestingly, soil warming, N fertilization, and their combination decreased foliar phosphorus (P) and magnesium (Mg) concentration of Picea asperata seedlings, but increased them in Pinus tabulaformis seedlings. Moreover, the combination of warming and N fertilization induced greater increments of amino acid, area-based N concentration and mass-based N concentration, manganese (Mn) and zinc (Zn), and further decreased P and calcium (Ca) concentration in Picea asperata seedlings. However, this phenomenon was not observed in Pinus tabulaformis seedlings. These results indicated that Picea asperata seedlings are more sensitive to the combination of warming and N fertilizer than Pinus tabulaformis seedlings.

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“…Some research considered that the products of nitrate and ammonium assimilation resulted in the inhibition, because the products, such as amino acids, were responsible for the down-regulation of nitrate uptake when ammonium is supplied simultaneously (Lee et al 1992;Imsande and Touraine 1994). After uptake, ammonium is assimilated mainly in the roots, while the NO 3 -is assimilated in both roots and shoots of plants (Andrews 1986;Munzarova et al 2006), and the ammonium can be converted into amino acids directly, whereas NO 3 -needs to be reduced to NH 4…”

Section: Sex-specific Difference Of Biomass Accumulation and Allocationmentioning

confidence: 99%

“…Many studies have been reported that different plant species, genotypes, growing conditions, and lifespan showed different responses to different N forms (Claussen and Lenz 1999;Strojny 1999;Munzarova et al 2006;Luo et al 2013b). For the poplar, there were some conflicting results which had been reported by (Rennenberg et al 2010).…”

Section: Sex-specific Difference Of Biomass Accumulation and Allocationmentioning

confidence: 99%

Populus deltoides females are more selective in nitrogen assimilation than males under different nitrogen forms supply

Dong

Guo

et al. 2014

Trees

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Key Message Female cuttings of Populus deltoides were sensitive to inorganic nitrogen forms and biased for NO 3 2 -N, whereas males exhibited no obvious preference for nitrogen form in nitrogen fertilizations. Abstract We investigated the effects of different inorganic nitrogen forms (NO 3 --N and NH 4 ? -N) on the morphology, physiology, and carbohydrate accumulation of male and female Populus deltoides. Results showed that both NO 3 --N and NH 4 ? -N supply forms significantly increased plant growth, C and N contents of all plant organs, chlorophyll pigment contents, net photosynthesis rates (P n ), and instantaneous photosynthetic N-use efficiencies (PNUE) in the leaves of both male and female P. deltoides. Females exhibited high total plant dry mass accumulation, P n , PNUE, and N contents in leaves but lower non-structure carbohydrate accumulation than males under nitrate treatment. However, males showed significantly higher P n , PNUE, and 15 NH 4 ? in the leaves, free amino acid content, and nitrate reductase (NR) activities than females under each nitrogen form supply treatment.These results suggested that male and female P. deltoides used different adaptive strategies in dry mass accumulation, allocation, and exhibited different interactions between nitrogen and carbon metabolism. Males exhibited higher nitrogen assimilation ability and N-use efficiency than females under nitrogen fertilizations, whereas females showed more sensitivity to inorganic nitrogen forms of treatments and distinct preference for NO 3 --N. Male P. deltoides showed no obvious bias to the two different N forms. Therefore, the different preferences of male and female P. deltoides of N supplied forms can serve as an important strategy for minimizing intraspecific competition between the two genders.

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Effect of NH4+/NO3− availability on nitrate reductase activity and nitrogen accumulation in wetland helophytes Phragmites australis and Glyceria maxima

Cited by 61 publications

References 37 publications

Advantages of NH4 + on growth, nitrogen uptake and root respiration of Phragmites australis

Advantages of NH4 + on growth, nitrogen uptake and root respiration of Phragmites australis

Effects of elevated temperature and nitrogen fertilization on nitrogen metabolism and nutrient status of two coniferous species

Populus deltoides females are more selective in nitrogen assimilation than males under different nitrogen forms supply

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