Ion uptake and structural modifications induced by nitrogen source in tomato (Solanum lycopersicum Mill. Cv. Ibiza F1)

Ezzine, M.; Debouba, Mohamed; Ghorbel, Mohamed Habib; Gouia, Houda

doi:10.1016/j.crvi.2011.05.002

Cited by 4 publications

(4 citation statements)

References 43 publications

(47 reference statements)

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“…Nitrite is toxic for plants, mostly because of the formation of NO [ 46 ], but it is usually rapidly reduced to NH 4 + by nitrite reductase and can accumulate only in tissues deficient in reduction capacity [ 47 ]. Nitrite treatment usually results in reduced plant growth and mineral deficiency [ 48 , 49 ], but nitrite has been indicated as an important source of N [ 47 ], especially in conditions not favoring nitrous acid production in substrate [ 50 ]. The toxicity threshold of nitrite in soil is in a range 75–225 mg kg −1 [ 51 ].…”

Section: Discussionmentioning

confidence: 99%

Type of Anion Largely Determines Salinity Tolerance in Four Rumex Species

Landorfa-Svalbe

Andersone-Ozola

Ievinsh

2022

Plants

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The aim of the present study was to compare the effect of various salts composed of different cations (Na+, K+) and anions (chloride, nitrate, nitrite) on growth, development and ion accumulation in three Rumex species with accessions from sea coast habitats (Rumex hydrolapathum, Rumex longifolius and Rumex maritimus) and Rumex confertus from an inland habitat. Plants were cultivated in soil in an experimental automated greenhouse during the autumn–winter season. Nitrite salts strongly inhibited growth of all Rumex species, but R. maritimus was the least sensitive. Negative effects of chloride salts were rather little-pronounced, but nitrates resulted in significant growth stimulation, plant growth and development. Effects of Na+ and K+ at the morphological level were relatively similar, but treatment with K+ salts resulted in both higher tissue electrolyte levels and proportion of senescent leaves, especially for chloride salts. Increases in tissue water content in leaves were associated with anion type, and were most pronounced in nitrate-treated plants, resulting in dilution of electrolyte concentration. At the morphological level, salinity responses of R. confertus and R. hydrolapathum were similar, but at the developmental and physiological level, R. hydrolapathum and R. maritimus showed more similar salinity effects. In conclusion, the salinity tolerance of all coastal Rumex species was high, but the inland species R. confertus was the least tolerant to salinity. Similarity in effects between Na+ and K+ could be related to the fact that surplus Na+ and K+ has similar fate (including mechanisms of uptake, translocation and compartmentation) in relatively salt-tolerant species. However, differences between various anions are most likely related to differences in physiological functions and metabolic fate of particular ions.

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Section: Discussionmentioning

confidence: 99%

Type of Anion Largely Determines Salinity Tolerance in Four Rumex Species

Landorfa-Svalbe

Andersone-Ozola

Ievinsh

2022

Plants

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“…It was concluded, therefore, that a significant number of the genes (apparently induced by nitrate) were actually induced in response to nitrite, produced as a result of nitrate reduction. Nevertheless, the importance of nitrite as a nutrient for plants has been overlooked, and it has mainly been studied as a toxic agent (Lee, 1979;Samater et al, 1998;Zsoldos et al, 2001;Ezzine et al, 2011). The toxicity associated with nitrite is prevalent under conditions of low pH and high concentrations (Zsoldos et al, 1995;Ezzine et al, 2011), conditions that favour conversion of NO À 2 to nitrous acid (HNO 2 ).…”

Section: Discussionmentioning

confidence: 99%

“…Nevertheless, the importance of nitrite as a nutrient for plants has been overlooked, and it has mainly been studied as a toxic agent (Lee, 1979;Samater et al, 1998;Zsoldos et al, 2001;Ezzine et al, 2011). The toxicity associated with nitrite is prevalent under conditions of low pH and high concentrations (Zsoldos et al, 1995;Ezzine et al, 2011), conditions that favour conversion of NO À 2 to nitrous acid (HNO 2 ). However, these conditions are not widespread in the environment and therefore its importance as a plant nutrient requires greater emphasis.…”

Section: Discussionmentioning

confidence: 99%

“…The presence of

{NO}_{2}^{-}

in nutrient solution can have adverse effects on plant growth (Phipps & Cornforth, ; Lee, ; Samater et al ., ; Zsoldos et al ., ; Ezzine et al ., ). Its toxicity is, however, more pronounced at high concentrations and low pH (Bancroft et al ., ), possibly as a result of free nitrous acid (the conjugate acid of

{NO}_{2}^{-}

) permeation, in addition to plant

{NO}_{2}^{-}

anion uptake (Zentmyer & Bingham, ).…”

Section: Introductionmentioning

confidence: 99%

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Characterization of nitrite uptake in Arabidopsis thaliana: evidence for a nitrite‐specific transporter

2013

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SummaryNitrite-specific plasma membrane transporters have been described in bacteria, algae and fungi, but there is no evidence of a nitrite-specific plasma membrane transporter in higher plants. We have used 13 NO À 2 to characterize nitrite influx into roots of Arabidopsis thaliana. Hydroponically grown Arabidopsis mutants, defective in high-affinity nitrate transport, were used to distinguish between nitrate and nitrite uptake by means of the short-lived tracers 13 NO À 2 and 13 NO À 3 . This approach allowed us to characterize a nitrite-specific transporter. The Atnar2.1-2 mutant, lacking a functional high-affinity nitrate transport system, is capable of nitrite influx that is constitutive and thermodynamically active. The corresponding fluxes conform to a rectangular hyperbola, exhibiting saturation at concentrations above 200 lM (K m = 185 lM and V max = 1.89 lmol g À1 FW h À1

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Effect of NPK fertiliser on upper and basal stem diameters and implication on growth habit of tomato

Olagunju,

Sosanya,

Oguntade

et al. 2024

Journal of the Saudi Society of Agricultural Sciences

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Ion uptake and structural modifications induced by nitrogen source in tomato (Solanum lycopersicum Mill. Cv. Ibiza F1)

Abstract: Ion uptake and structural modifications induced by nitrogen source in tomato (Solanum lycopersicum Mill. Cv. Ibiza F1)Absorption ionique et modifications structurales induites par la source d'azote chez la tomate (Solanum lycopersicum Mill. Cv. Ibiza F1

Cited by 4 publications

References 43 publications

Type of Anion Largely Determines Salinity Tolerance in Four Rumex Species

Type of Anion Largely Determines Salinity Tolerance in Four Rumex Species

Characterization of nitrite uptake in Arabidopsis thaliana: evidence for a nitrite‐specific transporter

Effect of NPK fertiliser on upper and basal stem diameters and implication on growth habit of tomato

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