Kinetics of nitrate uptake by Citrus seedlings and inhibitory effects of salinity

Cerezo, Miguel; García‐Agustín, Pilar; Serna, M. D.; Primo‐Millo, Eduardo

doi:10.1016/s0168-9452(97)00095-2

Cited by 79 publications

(66 citation statements)

References 32 publications

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“…These values were in general agreement with other plant species ranging 0.007Á0.187 mM. K m values have been reported as being 0.033 mM for perennial ryegrass, 0.040 mM for Arabidopsis (Herbert et al 1995), 0.027 mM for wheat (Goyal and Huffaker 1986), 0.281 mM in Citrus (Carezo et al 1997), and 7.5 mM excised corn root (Sehtiya and Goyal, 2000). Rroco et al uptake rate and its K m .…”

Section: Journal Of Plant Interactionssupporting

confidence: 86%

Variability of nitrogen uptake and assimilation among N-efficient and N-inefficient wheat (Triticum aestivumL.) genotypes

Chandna

Hakeem

Khan

et al. 2011

Journal of Plant Interactions

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Ten genotypes of wheat (Triticum aestivum L.) were grown for 20 days in complete nutrient solution with 1 mM (nitrogen-insufficient), 4 mM (nitrogen-moderate) and 10 mM (nitrogen-sufficient) nitrogen (N) levels, and nitrogen efficiency (NE) was analyzed. Of these 10 genotypes, VL829 was identified as the most N-efficient, while HUW234 the most N-inefficient. To find out the physiological basis of this difference, we investigated the possible role of NO 2À 3 influx across the root cell plasma membrane in conferring NE by measuring the short-term NO 2À 3 uptake in selected 10 genotypes. Uptake experiments revealed the presence of two separate nitrate transporter systems mediating high-and low-affinity nitrate uptake. Interestingly, the nitrate uptake by the roots of VL829 is mediated by both high-and low-affinity nitrate transporter systems, while that of HUW234 by only low affinity nitrate transporter system. The study suggests that root NO 2À 3 uptake rate may play an important role in conferring N-efficiency of wheat genotypes under N-limiting condition. Also the activities and expression levels of nitrate assimilatory enzymes in N-efficient and N-inefficient wheat genotypes showed that nitrate reductase (NR) and glutamine synthetase (GS) play important roles in N assimilation under low-nitrogen conditions.

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Section: Journal Of Plant Interactionssupporting

confidence: 86%

Variability of nitrogen uptake and assimilation among N-efficient and N-inefficient wheat (Triticum aestivumL.) genotypes

Chandna

Hakeem

Khan

et al. 2011

Journal of Plant Interactions

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“…Second, the observation that NO 3 ¡ HATS activity was maximal in the absence of NO 3 ¡ (Fig. 1a) does not Wt with the occurrence of a NO 3 ¡ -inducible HATS component (iHATS), which is generally observed in most plant species, including Citrus (Aslam et al 1992;Kronzucker et al 1995;Cerezo et al 1997). The LATS-mediated inXuxes of NH 4 + and NO 3 ¡ are not altered when plants are exposed to diVerent NH 4 + /NO 3 ¡ ratio (Fig.…”

Section: Discussionmentioning

confidence: 93%

Ammonium transport and CitAMT1 expression are regulated by N in Citrus plants

Camañes

Cerezo

Primo‐Millo

et al. 2008

Planta

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“…Furthermore, sodium/calcium exchange and the effect of these ions on the soil hydraulic properties [Russo et al, 2004], the interaction between the two subsystems, chloride uptake by plant roots [Moya et al, 2003], the antagonism between nitrate and chloride uptake [Cerezo et al, 1997], the inhibition of nitrate uptake by ammonium or by the products of its assimilation [Serna et al, 1992], and the fate of other contaminants such as phosphate, boron, and trace metals are not considered in the present study.…”

Section: 1002/2014wr015514mentioning

confidence: 99%

On the mechanism of field‐scale solute transport: Insights from numerical simulations and field observations

Russo

Laufer

Gerstl

et al. 2014

Water Resources Research

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Field-scale transport of conservative and reactive solutes through a deep vadose zone was analyzed by means of two different model processes for the local description of the transport. The first is the advection-dispersion equation (ADE) model, and the second is the mobile-immobile (MIM) model. The analyses were performed by means of three-dimensional (3-D), numerical simulations of flow and transport considering realistic features of the flow system, pertinent to a turf field irrigated with treated sewage effluents (TSE). Simulated water content and concentration profiles were compared with available measurements of their counterparts. Results of the analyses suggest that the behavior of both solutes in the deep vadose zone of the Glil Yam site is better quantified by the MIM model than by the ADE model. Reconstruction of the shape of the measured solute concentration profiles using the MIM model required relatively small mass transfer coefficient, c, and relatively large volume fraction of the immobile water h im . This implies that for an initially nonzero solute concentration profile, as compared with the MIM model, the ADE model may significantly overestimate the rate at which solutes are loaded in the groundwater. On the contrary, for an initially zero solute concentration profile, as compared with the MIM model, the ADE model may significantly underestimate solute velocities and early arrival times to the water table. These findings stem from the combination of relatively small c and relatively large h im taken into account in the MIM model. In the first case, this combination forces a considerable portion of the solute mass to reside in the immobile region of the water-filled pore space, while the opposite is true in the second case.

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Kinetics of nitrate uptake by Citrus seedlings and inhibitory effects of salinity

Cited by 79 publications

References 32 publications

Variability of nitrogen uptake and assimilation among N-efficient and N-inefficient wheat (Triticum aestivumL.) genotypes

Variability of nitrogen uptake and assimilation among N-efficient and N-inefficient wheat (Triticum aestivumL.) genotypes

Ammonium transport and CitAMT1 expression are regulated by N in Citrus plants

On the mechanism of field‐scale solute transport: Insights from numerical simulations and field observations

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