Characteristics of Nitrate Uptake by Plants Under Salinity

Abdelgadir, Eltayeb; Oka, Mariko; Fujiyama, Hideyasu

doi:10.1081/pln-200042156

Cited by 68 publications

(41 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Results indicate that fruit N uptake was the lowest at 60 mM salinity level probably due to less N absorption. At 60 mM salinity level, fruit N uptake increased with application of 1.5% N, but significantly decreased by 3% N, indicating, probable salinity amplification due to application of 3% Abdelgadir et al (2005) reported that N concentration of tomato shoots increased with N application under Cl − and SO 4 salinity.…”

Section: Resultsmentioning

confidence: 89%

Influence of Nitrogen and Salinity Levels on the Fruit Yield and Chemical Composition of Tomato in a Hydroponic Culture

Zahedifar

Ronaghi

Moosavi

et al. 2012

Journal of Plant Nutrition

View full text Add to dashboard Cite

2 Tomato seedlings were transferred to continuously, aerated plastic containers. Treatments consisted of three nitrogen (N) levels [0, 1.5, and 3% as ammonium chloride (NH 4 Cl) and ammonium phosphate (NH 4 H 2 PO 4 ) 2:1 w/w] and three salinity levels (0, 30, and 60 mM using sodium chloride (NaCl) and calcium chloride (CaCl 2 )]. Results indicated significant positive and negative responses in fruits fresh weight to nitrogen and salinity treatments, respectively. Number of fruits and root length decreased at high salinity level. Phosphorus (P) content was highest in fruits and lowest in roots. Fruit P uptake decreased with salinity applications in N controls. At low salinity levels, N application mitigated the salinity detrimental effects; however, such an effect was not observed at the high salinity level. Nitrogen application significantly decreased iron, zinc, copper, and manganese concentration and uptake. Application of nitrogen and salinity levels significantly increased the citric acid content of tomato fruits. Vitamin C content of fruits was neither influenced by nitrogen nor by salinity.

show abstract

Section: Resultsmentioning

confidence: 89%

Influence of Nitrogen and Salinity Levels on the Fruit Yield and Chemical Composition of Tomato in a Hydroponic Culture

Zahedifar

Ronaghi

Moosavi

et al. 2012

Journal of Plant Nutrition

View full text Add to dashboard Cite

show abstract

“…On the other hand, higher N uptake may in turn improve salt tolerance of the transgenic plants, because addition of N into N‐deficient soils at moderate salt stress can improve growth and yield of various plants (Abdelgadir et al . ; Esmaili et al . ).…”

Section: Discussionmentioning

confidence: 99%

H⁺‐pyrophosphatase from Salicornia europaea confers tolerance to simultaneously occurring salt stress and nitrogen deficiency in Arabidopsis and wheat

Jiang

Nie

et al. 2015

Plant Cell & Environment

View full text Add to dashboard Cite

High salinity and nitrogen (N) deficiency in soil are two key factors limiting crop productivity, and they usually occur simultaneously. Here we firstly found that H(+) -PPase is involved in salt-stimulated NO3 (-) uptake in the euhalophyte Salicornia europaea. Then, two genes (named SeVP1 and SeVP2) encoding H(+) -PPase from S. europaea were characterized. The expression of SeVP1 and SeVP2 was induced by salt stress and N starvation. Both SeVP1 or SeVP2 transgenic Arabidopsis and wheat plants outperformed the wild types (WTs) when high salt and low N occur simultaneously. The transgenic Arabidopsis plants maintained higher K(+) /Na(+) ratio in leaves and exhibited increased NO3 (-) uptake, inorganic pyrophosphate-dependent vacuolar nitrate efflux and assimilation capacity under this double stresses. Furthermore, they had more soluble sugars in shoots and roots and less starch accumulation in shoots than WT. These performances can be explained by the up-regulated expression of ion, nitrate and sugar transporter genes in transgenic plants. Taken together, our results suggest that up-regulation of H(+) -PPase favours the transport of photosynthates to root, which could promote root growth and integrate N and carbon metabolism in plant. This work provides potential strategies for improving crop yields challenged by increasing soil salinization and shrinking farmland.

show abstract

“…The uptake of nitrate is known to compete with that of Cl, a major ion in saline soil (Xu et al 2000;Mengel and Kirkby 2001;Abdelgadir et al 2005). Such an interaction results in diminished N uptake and decreased plant growth at increased Cl concentrations.…”

Section: Discussionmentioning

confidence: 99%

Effects of salinity and nitrogen on cotton growth in arid environment

et al. 2009

View full text Add to dashboard Cite

The influences of different N fertilization rates and soil salinity levels on the growth and nitrogen uptake of cotton was evaluated with a pot experiment under greenhouse conditions. Results showed that cotton growth measured as plant height was significantly affected by the soil salinity and Nsalinity interaction, but not by N alone. Cotton was more sensitive to salinity during the emergence and early growth stages than the later developmental stages. At low to moderate soil salinity, the growth inhibition could be alleviated by fertilizer application. Soil salinity was a dominated factor affecting cotton's above-ground dry mass and root development. Dry mass of seed was reduced by 22%, 52%, and 84% respectively, when the soil salinity level increased from control level of 2.4 dS m −1 to 7.7 dS m −1 , 12.5 dS m −1 and to 17.1 dS m −1 , respectively. N uptake increased with N fertilization at adequate rates at both low and medium soil salinities but was not influenced by over N fertilization. At higher salinities, N uptake was independent of N rates and mainly influenced by soil salinity. The uptake of K decreased with soil salinity. The concentration of Na, Cl and Ca in plant tissues increased with soil salinity with highest concentrations in the cotton leaf.

show abstract

Characteristics of Nitrate Uptake by Plants Under Salinity

Cited by 68 publications

References 16 publications

Influence of Nitrogen and Salinity Levels on the Fruit Yield and Chemical Composition of Tomato in a Hydroponic Culture

Influence of Nitrogen and Salinity Levels on the Fruit Yield and Chemical Composition of Tomato in a Hydroponic Culture

H⁺‐pyrophosphatase from Salicornia europaea confers tolerance to simultaneously occurring salt stress and nitrogen deficiency in Arabidopsis and wheat

Effects of salinity and nitrogen on cotton growth in arid environment

Contact Info

Product

Resources

About

Characteristics of Nitrate Uptake by Plants Under Salinity

Cited by 68 publications

References 16 publications

Influence of Nitrogen and Salinity Levels on the Fruit Yield and Chemical Composition of Tomato in a Hydroponic Culture

Influence of Nitrogen and Salinity Levels on the Fruit Yield and Chemical Composition of Tomato in a Hydroponic Culture

H+‐pyrophosphatase from Salicornia europaea confers tolerance to simultaneously occurring salt stress and nitrogen deficiency in Arabidopsis and wheat

Effects of salinity and nitrogen on cotton growth in arid environment

Contact Info

Product

Resources

About

H⁺‐pyrophosphatase from Salicornia europaea confers tolerance to simultaneously occurring salt stress and nitrogen deficiency in Arabidopsis and wheat