Adequate supply of potassium improves plant water‐use efficiency but not leaf water‐use efficiency of spring wheat

Jákli, Bálint; Tränkner, Merle; Şenbayram, Mehmet; Dittert, Klaus

doi:10.1002/jpln.201600340

Cited by 32 publications

(22 citation statements)

References 80 publications

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“…). These observations are in accordance with Cakmak et al () in bean ( Phaseolus vulgaris L.) and Jákli et al () in spring wheat plants ( Triticum aestivum L. var. Sonett ).…”

Section: Discussionsupporting

confidence: 93%

Differential effects of varied potassium and magnesium nutrition on production and partitioning of photoassimilates in potato plants

Koch

Busse

Naumann

et al. 2018

Physiologia Plantarum

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102

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Potassium (K) and magnesium (Mg) are essential macronutrients for plants; they play crucial roles for photoassimilate production and transport. The knowledge on both individual and interactive effects of K and Mg nutrition in potato (Solanum tuberosum L.) is limited. We aimed to determine whether K or Mg deficiencies impair photoassimilate production and transport, and consequently the development of tubers which are strong sink organs for photoassimilates. Potato plants were grown in pots using sand culture under various K and Mg supplies. Biomass production, CO2 net assimilation, leaf sugar concentrations and transcript levels of H+/sucrose symporters in leaves were measured. Both K and Mg deficiencies reduced CO2 net assimilation and biomass production, with stronger reductions during K deficiency. Sugars accumulated in K‐ and, more importantly, in Mg‐deficient leaves. Low K or Mg supplies resulted in increased transcript levels of H+/sucrose symporters, but the increase was less pronounced during Mg deficiency. The lower increase of transcript levels of H+/sucrose symporters under Mg deficiency was probably caused by an impaired sucrose transport already at an earlier step, namely the efflux of sucrose from mesophyll cells into the apoplast. Thus, we assume that K and Mg deficiencies caused sugar accumulation in separated cell compartments of source leaves leading to a different impact on the gene expression of sucrose transport systems. Tuber sugar and starch concentrations, however, remained unaffected under the various treatments. Nevertheless, the total amount of tuber sugar and starch per plant decreased significantly during K and Mg deficiencies.

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“…). These observations are in accordance with Cakmak et al () in bean ( Phaseolus vulgaris L.) and Jákli et al () in spring wheat plants ( Triticum aestivum L. var. Sonett ).…”

Section: Discussionsupporting

confidence: 93%

Differential effects of varied potassium and magnesium nutrition on production and partitioning of photoassimilates in potato plants

Koch

Busse

Naumann

et al. 2018

Physiologia Plantarum

Self Cite

102

View full text Add to dashboard Cite

show abstract

“…Similar results were obtained by Martineau et al. () for field‐grown maize under deficit irrigation, which stands in contradiction to studies reporting negative (Egilla, Davies, & Boutton, ; Pervez et al., ) or no (Battie‐Laclau et al., ; Jákli, Tränkner, Senbayram, & Dittert, ; Jákli et al., ) effects of reduced K availability on photosynthetic WUE Leaf . In this study, however, enhanced LAI in fertilized treatments provided a higher area for transpiration and resulted in a more efficient soil moisture absorption by roots compared to unfertilized treatments.…”

Section: Discussionsupporting

confidence: 58%

Leaf, canopy and agronomic water‐use efficiency of field‐grown sugar beet in response to potassium fertilization

Jákli

Hauer-Jákli

Böttcher

et al. 2017

J Agronomy Crop Science

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Potassium (K) fertilization is important to maintain adequate concentrations of plant available K in agricultural soils to achieve best yields and improve crop stress tolerance and water-use efficiency (WUE). Water-use efficiency (WUE) can be expressed on various spatiotemporal scales, and it is known that responses of WUE to external stress are not uniform across scales. Multiscale evaluations of the impact of varying K fertilization on the WUE of C 3 crops under field conditions are missing so far. In the present field study, we evaluated effects of K fertilization on WUE of sugar beet (Beta vulgaris L.) on short-termed leaf-(WUE Leaf ) and canopy-scales (WUE Canopy ) and as the agronomic ratio of white sugar yield (WSY) to in-season water use (i.e. WUE WSY ). In K-fertilized plots, WUE WSY was enhanced by 15.9%. This effect is attributed to increased beet yield and WSY, as no differences in total in-season water use between fertilized and unfertilized plots were observed. Potassium (K) fertilization significantly enhanced the leaf area index, resulting in a more efficient depletion of soil moisture by roots in K-fertilized plots. As a consequence, WUE Leaf was increased due to stomatal adjustment. Potassium (K) improved WUECanopy only by tendency. It is concluded that K fertilization improves the WUE of field-grown sugar beet across scales, but processes that regulate WUE are highly scale dependent.

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“…Under K deficiency, there can be a decrease in the number of leaves as well as a decrease in the leaf size. This can be attributed to K's role in osmoregulation and cell extension (Gerardeaux et al 2010;Jákli et al 2016). Besides the aforementioned functions, K is crucial for photosynthesis and the distribution of photosynthates via the phloem.…”

Section: Potassiummentioning

confidence: 99%

The Importance of Nutrient Management for Potato Production Part I: Plant Nutrition and Yield

et al. 2019

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As part of a successful agronomic strategy, adequate nutrient management of the potato crop is essential throughout the whole growth period. In this review, the importance of balanced fertilisation for potato yield formation and yield security is addressed by taking advantage of the results of field trials and existing literature. The most important roles of the macronutrients nitrogen, phosphorous, potassium, magnesium, calcium and sulphur in the plant and their importance for yield formation in potato are reviewed. Fertilisation practices in potato production are discussed. Due to their various functions in plant metabolism, the impact of plant nutrients on potato yield is complex. Therefore, interactions with abiotic and biotic factors, for instance interactions between two different plant nutrients in the soil and the plant, are taken into account.

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Adequate supply of potassium improves plant water‐use efficiency but not leaf water‐use efficiency of spring wheat

Cited by 32 publications

References 80 publications

Differential effects of varied potassium and magnesium nutrition on production and partitioning of photoassimilates in potato plants

Differential effects of varied potassium and magnesium nutrition on production and partitioning of photoassimilates in potato plants

Leaf, canopy and agronomic water‐use efficiency of field‐grown sugar beet in response to potassium fertilization

The Importance of Nutrient Management for Potato Production Part I: Plant Nutrition and Yield

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