Change in Uptake, Transport and Accumulation of Ions in Nerium oleander (Rosebay) as Affected by Different Nitrogen Sources and Salinity

Abdolzadeh, Ahmad; Shima, Kazuto; Lambers, Hans; Chiba, Kouji

doi:10.1093/aob/mcn156

Cited by 28 publications

(14 citation statements)

References 34 publications

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“…The uptake and accumulation of K + in shoots decreased more due to salinity in ammonium-fed plants compared to nitratefed plants. By contrast, K + cycling in shoots increased due to salinity, with higher rates in the ammoniumtreated plants (Abdolzadeh et al 2008).…”

Section: K Uptake and Content In Plants Under Variable N Regimesmentioning

confidence: 88%

Potassium nutrition of crops under varied regimes of nitrogen supply

et al. 2010

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Nitrogen (N) over-application is a serious problem in intensive agricultural production areas with consequent large N losses and environmental pollution. In contrast to N, potassium (K) application has been neglected in many developing countries and this has resulted in soil K depletion in agricultural ecosystems and prevented increases in crop yields. Nitrogenpotassium interaction is currently a topic of interest in many studies and the focus of this review is K nutrition under varied N regimes. Nitrogen form and application rate and time influence soil K fixation and release, as well as K uptake, transport, cycling and reutilization within crops. High yielding quality crops can be obtained by optimal N: K nutritional ratios. High rates of applications of N and K do not necessarily lead to increased yield increments and may even reduce yield. Yield response to K uptake depends on N nutritional status and the interaction is usually positive when NO 3 − -N is supplied. Antagonism between NH 4 + and K + in uptake was mostly attributed to simple competitive effects in the past while evidence showing mixednoncompetitive interactions existed. Two components of membrane transport systems for K uptake by plants are a high-affinity K + transport system which is inhibited by NH 4 + and a low-affinity K + transport system which is relatively NH 4 + insensitive. Potassium is highly mobile within plants but its flow and partitioning can change depending on the forms of N supply. NH 4 + nutrition in comparison to NO 3 − -supply results in more K translocation to leaves. A better understanding of the mechanism of N-K interaction can be a useful guide to best nutrient management in agricultural practice in order to achieve high yields with high nutrient use efficiency.

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Section: K Uptake and Content In Plants Under Variable N Regimesmentioning

confidence: 88%

Potassium nutrition of crops under varied regimes of nitrogen supply

et al. 2010

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“…There are reports for several species including maize, wheat, pea, grey poplar ( Populus tremula × alba ) and Nerium oleander of greater tolerance of moderate salinity (30–100 mol m −3 NaCl) following growth under NO 3 − in comparison with NH 4 + nutrition (1–5.5 mol m −3 N) (Lewis et al ., ; Speer et al ., ; Frechilla et al ., ; Ehlting et al ., ; Abdolzadeh et al ., ). However, there are also reports for peanut, soybean, wheat and kaller grass of similar effects of salt on growth on the two N forms (Silberbush & Lips, ; Bourgeais‐Chaillou et al ., ; Botella et al ., ; Mahmood & Kaiser, ).…”

Section: Environmental Stress/change and N Formmentioning

confidence: 97%

Do plants need nitrate? The mechanisms by which nitrogen form affects plants

Andrews

Raven

Lea

2013

Annals of Applied Biology

303

169

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The literature on nitrogen (N) form effects on plants at different stages of their development has been critically reviewed, assessing the possible mechanisms of these effects. In particular, nitrate (NO 3 − ) was compared with the other forms of N utilised by plants. It is concluded that the form of N available to plants can affect their time and rate of seed germination, leaf expansion and function, dry matter partitioning between shoot and root, and root architecture. The magnitude of these effects is dependent on environmental factors outside the supply of N. The mechanism of these effects is variable. Assessment of the importance of root or shoot NO 3 − assimilation under different environmental conditions is an important area for further study.

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“…Pathway [2] highlights the importance of interactions between salinity and availability of resources, mainly water (Katerji et al 2009;Richards 1992) and nitrogen (Abdolzadeh et al 2008;Esmaili et al 2008).…”

Section: Growing Conditionsmentioning

confidence: 99%

A water-centred framework to assess the effects of salinity on the growth and yield of wheat and barley

2010

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We used a water-centred framework (yield = transpiration × transpiration efficiency × harvest index) to investigate the effect of soil salinity on growth and yield of wheat and barley. Our working hypothesis is that salinity reduces transpiration proportionally more than transpiration efficiency. We established a glasshouse experiment with the factorial combination of four varieties (wheat: Janz, Krichauff; barley: Mundah, Keel) and three soil treatments: a control with no NaCl added, and NaCl added to achieve soil EC 1:5 0.75 dS m −1 and 1.5 dS m −1 . Pot-grown plants were watered to weight to determine transpiration and shoot dry matter was determined using a non-destructive image analysis system. Consistent with our hypothesis, salinity reduced transpiration (30-60%) proportionally more than transpiration efficiency (0-35%); transpiration accounted for 90% of the variation in shoot growth across varieties and treatments. Against this pattern, there were time-and variety-dependent responses. The rate of leaf appearance and the transpiration efficiency of Janz, Krichauff and Keel showed a two-stage response to salinity. In stage 1, salt-stressed plants maintained rate of leaf appearance and transpiration efficiency close to or slightly below those of the controls. After a clear break point where the slope changed, stage 2 was characterised by a substantial reduction in both traits. Stage 2 was not evident in saltstressed Mundah, which maintained a relatively high rate of leaf appearance and transpiration efficiency. Across species, harvest index increased from 0.40 in controls to 0.47 at 0.75 dS m −1 . Harvest index of plants grown at 1.5 dS m −1 was unaffected in wheat, and was reduced in barley. We propose that an understanding of the effect of salinity on crop development, growth and yield requires integration of low-level traits in a framework of resource capture, resource-use efficiency and plant allocation. Osmotic stress tolerance, Na + exclusion, and tissue tolerance to accumulated Na + would improve yield of salt-stressed crops to the extent that these traits contribute to the maintenance of water uptake and harvest index.

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Change in Uptake, Transport and Accumulation of Ions in Nerium oleander (Rosebay) as Affected by Different Nitrogen Sources and Salinity

Cited by 28 publications

References 34 publications

Potassium nutrition of crops under varied regimes of nitrogen supply

Potassium nutrition of crops under varied regimes of nitrogen supply

Do plants need nitrate? The mechanisms by which nitrogen form affects plants

A water-centred framework to assess the effects of salinity on the growth and yield of wheat and barley

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