Overcoming ammonium toxicity

Bittsanszky, Andrâs; Pilinszky, Katalin; Gyulai, Gábor; Kőmíves, Tamás

doi:10.1016/j.plantsci.2014.12.005

Cited by 259 publications

(232 citation statements)

References 66 publications

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“…Moreover the excess of ammonium in the nutritive solution caused a high accumulation of this cation in the chloroplasts being able to block the metabolism of the enzymatic complex GS-GOGAT, responsible for the assimilation of nitrogen by plants (Bittsánszky et al, 2015). While in the presence of silicon, there was greater accumulation of this element in the plants followed by a progressive increase in the aerial part, until the concentration of ammonium reached 17 mmol L -1 .…”

Section: Resultsmentioning

confidence: 99%

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Response of radish seedlings ( Raphanus sativus L.) to different concentrations of ammoniacal nitrogen in absence and presence of silicon

Viciedo¹,

Prado²,

Toledo³

et al. 2017

Agron. colomb.

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Response of radish seedlings (Raphanus sativus L.) to different concentrations of ammoniacal nitrogen in absence and presence of siliconRespuesta de las plántulas del rábano (Raphanus sativus L.) a diferentes concentraciones de nitrógeno amoniacal en ausencia y presencia de silicio ABSTRACT RESUMENThere are unknown thresholds about the effects of ammonia toxicity in the cultivation of radish and its prejudice is higher in the root than in the aerial part, been the use of silicon an alternative to mitigate this toxicity. The objective was to evaluate the response of radish crop to different concentrations of an ammonium nutrient solution in the absence and presence of silicon under greenhouse conditions. After 30 days of germination were evaluated photosynthesis, green color index, stomatal conductance, transpiration, leaf area, tap root diameter, dry matter accumulation of nitrogen and silicon in shoot parts and roots respectively. Ammonia toxicity in radish decreased photosynthesis, transpiration, and stomatal conductance, having greater prejudice in the dry matter accumulation of root and aerial part, this effect was mitigated with the presence of silicon in the nutrient solution.Existen dudas sobre los efectos de la toxicidad amoniacal en la fisiología del cultivo del rábano y su perjuicio es mayor en la raíz que en la parte aérea, siendo posible el uso del silicio para mitigar esa toxicidad. Para esto el objetivo fue evaluar la respuesta del cultivo del rábano en función de diferentes concentraciones de NH 4 + en la solución nutritiva en ausencia y presencia de silicio. Posterior a los 30 días de la germinación se evaluaron la fotosíntesis, índice de color verde, conductancia estomática, transpiración, área foliar, diámetro de la raíz, materia seca y acúmulos de nitrógeno y silicio respectivamente en la parte aérea y las raíces de las plantas. La toxicidad amoniacal en el rábano disminuyó la fotosíntesis, la transpiración y la conductancia estomática, habiendo mayor perjuicio en el acúmulo de la materia seca de la raíz y la parte aérea, siendo mitigado este efecto con la presencia de silicio en la solución nutritiva.Key words: beneficial element, abiotic stress, nitrogen; nutrient solution, vegetable.Palabras clave: elemento benéfico, estrés abiótico, solución nutritiva, hortaliza.Nitrogen is the second most required nutrient by vegetables. This element is mainly absorbed in form of nitrate or ammonium, and constitutes amino acids, proteins and enzymes. In this way, it exerts influence on the growth of plant species and on the production of reserve substances and maturation. Ammoniacal nitrogen can bring some benefits to plants, because it acts as an important intermediary in many metabolic reactions (Britto and Kronzucker, 2002), has lower energy expenditure for its metabolism, and dispenses the reduction phases, which are required to the absorption of NO 3 - (Hachiya et al., 2012). However, elevated concentrations of NH 4 + lead to several issues: induces toxicity in plants, may lead to chlorosis in leave...

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Section: Resultsmentioning

confidence: 99%

“…NxSi** N** Si** NxSi** N** Si** NxSi** N** Si** complex, responsible for the assimilation of N by plants (Bittsánszky et al, 2015).…”

mentioning

confidence: 99%

Response of radish seedlings ( Raphanus sativus L.) to different concentrations of ammoniacal nitrogen in absence and presence of silicon

Viciedo¹,

Prado²,

Toledo³

et al. 2017

Agron. colomb.

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“…An experiment was conducted by Cui et al (2017) and the authors verify that the grasses evaluated (Forage Oat and Highland Barley) showed a preference for ammonium absorption during early growth stages, but, in the later stages, the preference was for NO 3 -. According to Bittsánszky et al (2015) the ammonium toxicity typically occurs when the plant is exposed to high environmental concentrations of this chemical and the results of the intoxication, among others, are: depletion of carbon supply, damaged chloroplast ultrastructure, deficiency of mineral cations, disruptions in hormonal homeostasis and in photosynthesis. This can be confirmed by the high levels of NDF and low CP (Tables 2 and 3) found in the treatments with the lowest cutting heights (0.70 and 0.80 m) and lower N doses (45 and 90 kg ha -1 ).…”

Section: Ruminal Degradationmentioning

confidence: 99%

Effect of Nitrification Inhibitor and Cutting Heights on Degradability of Pearl Millet

Corrêa¹,

França²,

Magalhães³

et al. 2017

JAS

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Pearl millet crop has been increasingly growing in Brazilian Savanna and it is already being used as cover crop between annual crops. The plant has great forage potential, besides being a nutrient recycling plant due to its peculiar root system. This study was developed in order to assess the pearl millet nutritional value when submitted to nitrogen fertilizer. It was evaluated the effect of nitrogen fertilizer (ammonium sulfate nitrate) treated with the nitrification inhibitor 3,4-dimethyl pyrazole phosphate (DMPP) on the ruminal degradability of two pearl millets' cultivars, under four nitrogen fertilization levels (0, 45, 90 and 180 kg ha ) and pre-cutting heights (0.70, 0.80 and 0.90 m). The experimental design was a randomized block design in a factorial 3 × 4 (3 cutting heights × 4 nitrogen doses) with three replications. Data were submitted to analysis of variance and means were compared by Tukey test at 5% probability. The DMPP treated Nitrogen, in high doses, increased the dry matter, crude protein and neutral detergent insoluble fiber degradability in pearl millet handled at 0.90 m. The combination of fertilization with 45 or 90 kg ha -1 of nitrogen treated with DMPP, with the management of millet at 0.70 or 0.80 m did not favored the forage nutritional quality, indicating that in these treatments, the ratio between the availability of nitrogen in ammonium and nitrate forms may have been detrimental to the plants.

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“…Besides, N assimilation in ammonium form by plants require less energy, due to its direct incorporation to the carbon chain (Bittsánszky et al, 2015). The supply in adequate concentrations of N as ammonia, can increase N absorption (Xu et al, 2012) and also enhance the efficiency use of fertilizers (Sarasketa et al, 2014), resulting in higher production of dry matter (Zanin et al, 2015).…”

Section: Plant Final Population and Plant Dry Mattermentioning

confidence: 99%

Synergistic effects of seed inoculation with Azospirillum brasilense and nitrogen sources on double cropped maize production in tropical savanna of Brazil

Kaneko¹,

Sabundjian²,

Ferreira³

et al. 2016

Aust J Crop Sci

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Nitrogen (N) fertilization on maize crops has been going through modifications due to the use of technologies such as biological N fixation and modified fertilizers. This study aimed to evaluate the effect of seed inoculation with Azospirillum brasilense (with and without inoculation), N sources (urea and polymer coated urea) and side-dressed N levels (0; 45; 90; 135 and 180 kg ha -1 ), on double cropped maize in two regions of Brazilian savanna (Chapadão do Sul and Selvíria, State of Mato Grosso do Sul). The experiment design was arranged in randomized plots at a 2 x 2 x 5 factorial scheme with 4 replications. The following characteristics were evaluated: plant population (plants ha -1 ), plant dry matter, leaf N concentration, stem diameter, weight of 100 grains and grain yield. Seed inoculation with A. brasilense did not increase double cropped maize yield in both environments. The application of coated urea provided higher dry biomass, however, the polymer coated urea application showed no effect on grain yield in comparison to conventional urea. Increasing side-dressed N levels is the main key factor responsible to improve the double cropped maize yield in tropical Brazilian savanna.

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Overcoming ammonium toxicity

Cited by 259 publications

References 66 publications

Response of radish seedlings ( Raphanus sativus L.) to different concentrations of ammoniacal nitrogen in absence and presence of silicon

Response of radish seedlings ( Raphanus sativus L.) to different concentrations of ammoniacal nitrogen in absence and presence of silicon

Effect of Nitrification Inhibitor and Cutting Heights on Degradability of Pearl Millet

Synergistic effects of seed inoculation with Azospirillum brasilense and nitrogen sources on double cropped maize production in tropical savanna of Brazil

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