Partial substitution of NO3− by NH4+ fertilization increases ammonium assimilating enzyme activities and reduces the deleterious effects of salinity on the growth of barley

Kant, Surya; Kant, Pragya; Lips, Herman; Barak, Simon

doi:10.1016/j.jplph.2005.12.011

Cited by 71 publications

(44 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…O maior conteúdo de nitrogênio nas folhas do tratamento 75:25 e + NaCl foi favorecido pela substituição parcial do NO 3 -pelo NH 4 + , assim como encontrado por Kant et al (2007).…”

Section: Resultsunclassified

Compostos nitrogenados e carboidratos em sorgo submetido à salinidade e combinações de nitrato e amônio

Lobo¹,

Martins²,

Neto³

et al. 2011

Rev. Ciênc. Agron.

View full text Add to dashboard Cite

Compostos nitrogenados e carboidratos em sorgo submetido à salinidade e combinações de nitrato e amônio 1 Nitrogenous compounds and carbohydrates in sorghum subjected to salinity and combinations of nitrate and ammonium ), na presença e ausência de salinidade. A salinidade reduziu a concentração de nitrato nas folhas e colmo, nos tratamentos 100:0 e 75:25. O amônio acumulou-se mais nas plantas com NaCl, nas folhas e colmo. Os teores de aminoácidos livres totais nas folhas não se alteraram, mas, no colmo, aumentaram na presença de sal e aumento do amônio. A concentração de prolina livre nas folhas e colmo elevou-se nas plantas sob salinidade. O conteúdo de nitrogênio total foi maior nas folhas, entretanto não houve grandes alterações com a presença do sal. A concentração de carboidratos solúveis totais foi maior nas plantas tratadas com sal, exceto no colmo 0:100. Nas folhas, o teor de sacarose foi reduzido na presença do NaCl e aumento de amônio, enquanto, no colmo, foi maior no tratamento 75:25 com NaCl. O teor de amido não sofreu alterações com as diferentes combinações nas formas de N e salinidade. Conclui-se que combinações de NO -3 e NH 4 + no meio afetam a acumulação de compostos nitrogenados e carboidratos em folhas e colmo, com presença ou ausência de salinidade, em plantas de sorgo forrageiro. Palavras-chave -Sorghum bicolor. Nitrogênio. Estresse salino.Abstract -The objective of this study was to evaluate the effects of combinations of nitrate and ammonium in the medium, on the accumulation of nitrogen compounds and carbohydrates, in the presence and absence of salinity in sorghum plants. CSF 20 genotype sorghum seeds, were grown in the greenhouse and supplied with a nutritive solution at three different concentrations of nitrate and ammonium (100% NO 3 -: 0% NH 4 + , 75% NO 3 -: 25% NH 4 + e 0% NO 3 -: 100% NH 4 + ) both in the presence and absence of NaCl. Salinity reduced the nitrate concentration in both leaves and stalks in treatments at 100:0 and 75:25. The accumulation of ammonium was higher in those plants, in both leaves and stalk, in the presence of NaCl. The levels of free amino acids in the leaves showed no change, whereas those in the stalk increased in the presence of salt and with the increase of ammonium. The concentration of free proline in both leaves and stalk was higher in plants under salinity. The total nitrogen content was higher in the leaves without, however, showing much change in the presence of salt. The concentration of total soluble carbohydrates was higher in those plants treated with salt, except in the stalk 0:100. Sucrose levels in the leaves were lower in the presence of NaCl and the increase in ammonium, while they were higher in the stalk at 75:25 NaCl. The starch content did not alter much with the different levels of nitrogen and salinity. It is concluded that NO -3 and NH 4 + combinations in the medium affect the accumulation of nitrogen compounds and carbohydrates in the leaves and stalks of sorghum plants, both in the presence and absence of salinity.

show abstract

“…O maior conteúdo de nitrogênio nas folhas do tratamento 75:25 e + NaCl foi favorecido pela substituição parcial do NO 3 -pelo NH 4 + , assim como encontrado por Kant et al (2007).…”

Section: Resultsunclassified

Compostos nitrogenados e carboidratos em sorgo submetido à salinidade e combinações de nitrato e amônio

Lobo¹,

Martins²,

Neto³

et al. 2011

Rev. Ciênc. Agron.

View full text Add to dashboard Cite

show abstract

“…Salt stress also negatively influences nitrogen metabolism in plants (Kant et al 2007) by inhibition of the ammonia assimilation (Chandra et al 2001). Ammonia can be generated inside the plant by a variety of metabolic pathways such as photorespiration, phenylpropanoid metabolism, utilisation of nitrogen transport compounds and amino acids catabolism, from symbiotically fixed nitrogen (Hirel & Lea 2001).…”

Section: Introductionmentioning

confidence: 99%

Silicon improves salinity tolerance and affects ammonia assimilation in maize roots

et al. 2014

View full text Add to dashboard Cite

The present study was conducted to evaluate the effect of different salt concentrations (50 and 200 mM NaCl) on growth, permeability properties (electrolyte leakage, cell viability) and activity of glutamine synthetase (GS) and glutamate dehydrogenase (GDH) in roots of maize seedlings. Both salt concentrations significantly affected growth and permeability properties of maize seedling roots and this negative effect increased with concentration of salt and duration of experiments. On the other hand salinity induced only small changes in the activities of GS and GDH, usually small increase in the activity was observed. To characterise the possible protective effect of silicon (Si) on maize roots exposed to saline stress, different concentrations of Si were simultaneously applied to both, low (50 mM) and high (200 mM) salt concentrations. Possible protective effects of Si on studied parameters were analysed in time range of 3 days treatment with the most positive effect on salt-induced root growth inhibition at high salt concentration and electrolyte leakage. The results show significant increase in GDH activity under all the tested conditions, although the mechanisms underlying this increase have not been elucidated. The results indicate that silicon may ameliorate the salt-induced root growth inhibition and increase the plant vigour at stressful conditions.

show abstract

“…Such characteristics are favorable for S. salsa plants to grow well in coastal wetlands in Yellow River Delta and decrease the evaporation through accumulating high above-ground biomass in saline areas. Previous studies have shown that higher nutrient supply may provide more nutrient for plant growth and counteract the negative effects caused by the surrounding conditions, such as salts [16,17] , and flood [18,19] . In this study, it showed that S. salsa plants accumulated more biomass over the same growth period in the presence of different levels of nitrogen and LS treatment ( Table 2, 3).…”

Section: Discussionmentioning

confidence: 99%

Effects of salt stress and nitrogen application on growth and ion accumulation of Suaeda salsa plants

Guan¹,

Chen

et al. 2011

2011 International Conference on Remote Sensing, Environment and Transportation Engineering

View full text Add to dashboard Cite

show abstract

Partial substitution of NO3− by NH4+ fertilization increases ammonium assimilating enzyme activities and reduces the deleterious effects of salinity on the growth of barley

Cited by 71 publications

References 39 publications

Compostos nitrogenados e carboidratos em sorgo submetido à salinidade e combinações de nitrato e amônio

Compostos nitrogenados e carboidratos em sorgo submetido à salinidade e combinações de nitrato e amônio

Silicon improves salinity tolerance and affects ammonia assimilation in maize roots

Effects of salt stress and nitrogen application on growth and ion accumulation of Suaeda salsa plants

Contact Info

Product

Resources

About