Wheat genotypes differ in potassium efficiency under glasshouse and field conditions

Damon, Paul; Rengel, Zed

doi:10.1071/ar06402

Cited by 86 publications

(57 citation statements)

References 18 publications

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“…These higher K concentrations in the leaves (especially the lower leaves) of the K-efficient genotypes were associated with higher RuBP carboxylase activities and net photosynthetic rates allowing the leaves to maintain a higher photosynthetic capacity during grain filling. Damon and Rengel (2007) showed that in terms of grain yield of field and glasshouse grown wheat genotypes, the main factors determining tolerance to K deficiency were a high harvest index at K deficiency and the high ratio of harvest index at deficient to adequate K supply.…”

Section: Plant Breeding For K Efficiencymentioning

confidence: 99%

Research on potassium in agriculture: needs and prospects

2010

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This review highlights future needs for research on potassium (K) in agriculture. Current basic knowledge of K in soils and plant physiology and nutrition is discussed which is followed by sections dealing specifically with future needs for basic and applied research on K in soils, plants, crop nutrition and human and animal nutrition. The section on soils is devoted mainly to the concept of K availability. The current almost universal use of exchangeable K measurements obtained by chemical extraction of dried soil for making fertilizer recommendations is questioned in view of other dominant controlling factors which influence K acquisition from soils by plants. The need to take account of the living root which determines spatial K availability is emphasized. Modelling of K acquisition by field crops is discussed. The part played by K in most plant physiological processes is now well understood including the important role of K in retranslocation of photoassimilates needed for good crop quality. However, basic research is still needed to establish the role of K from molecular level to field management in plant stress situations in which K either acts alone or in combination with specific micronutrients. The emerging role of K in a number of biotic and abiotic stress situations is discussed including those of diseases and pests, frost, heat/drought, and salinity. Breeding crops which are highly efficient in uptake and internal use of K can be counterproductive because of the high demand for K needed to mitigate stress situations in farmers' fields. The same is true for the need of high K contents in human and animal diets where a high K/Na ratio is desirable. The application of these research findings to practical agriculture is of great importance. The very rapid progress which is being made in elucidating the role of K particularly in relation to stress signalling by use of modern molecular biological approaches is indicative of the need for more interaction between molecular biologists and agronomists for the benefit of agricultural practice. The huge existing body of scientific knowledge of practical value of K in soils and plants presents a major challenge to improving the dissemination of this information on a global scale for use of farmers. To meet this challenge closer cooperation between scientists, the agrochemical industry, extension services and farmers is essential.Keywords Potassium availability . Potassium micronutrient interaction . Spatial availability of potassium . K/Mg ratio . Abiotic stress . Biotic stress . Frost resistance . Food quality . K/Cd relations Plant Soil (2010) 335:155-180

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Section: Plant Breeding For K Efficiencymentioning

confidence: 99%

Research on potassium in agriculture: needs and prospects

2010

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“…2000). Yield limiting effect of water deficit could be overcome by increasing K supply (Damon and Rengel 2007). The bottom lines of the reviewed results in this section indicate that under drought stress conditions, yield losses can be minimized by the sufficient supply of K. However, its application effect at various plant growth stages is not well understood yet.…”

Section: Introductionmentioning

confidence: 99%

Potassium applied under drought improves physiological and nutrient uptake performances of wheat (Triticum Aestivun L.)

Raza

Saleem

Shah

et al. 2013

J. Soil Sci. Plant Nutr.

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The physiological and nutrient uptake performance of two wheat (Triticum aestivum L.) cultivars (Lasani-2008 and Auqab-2000) to foliar application of 1% potassium (K) at three different growth stages (tillering, flower initiation and grain filling) was investigated under water limited environment in a wire house experiment at the Nuclear Institute for Agriculture and Biology, Faisalabad. The aim was to find out the best K application stage for improvement in drought tolerance potential. Drought stress was created by withholding irrigation at the three growth stages and then K was sprayed with carboxymethyl cellulose as a sticking agent, whereas Tween-20 was used as a surfactant for foliar spray. At maturity, aboveground nitrogen, phosphorus, K, sodium and calcium uptakes by the crop were measured. Besides, water potential, osmotic potential and turgor potential of crop were also estimated. The results indicated that the drought stress at all three critical growth stages of wheat adversely affected plant's nutrient uptake, water potential, osmotic potential and turgor potential of wheat plants. The exogenous application of K under drought stress at all three critical growth stages enhanced tolerance of wheat by reducing toxic nutrient's uptake and improving the physiological efficiency. In this regards, both varieties showed uniform behavior. Maximum improvement in all the recorded nutrients uptake and physiological parameters was achieved when K was applied at grain filling stage of both cultivars.

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“…Traits related to nutrient use efficiency in plants are generally complicated quantitative traits. Quantitative trait locus analysis provides an effective approach for dissecting complicated traits into component loci and studying their relative effects on a specific trait (Doerge, 2002). In wheat, there have been few studies involving QTL mapping for K efficiency (Guo et al, 2012; Kong et al, 2013).…”

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Quantitative Trait Locus Mapping for Potassium Use Efficiency Traits at the Seedling Stage in Wheat under Different Nitrogen and Phosphorus Treatments

et al. 2015

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Potassium is often considered one of the three most important mineral nutrient elements for plant growth, development, and fecundity. In this study, 10 traits related to K use efficiency were investigated in 10 treatments supplied with different N and P concentrations using a set of wheat (Triticum aestivum L.) recombinant inbred lines (RILs) under hydroponic culture. A total of 127 quantitative trait loci (QTLs) for the ten traits were detected on 20 chromosomes, with the exception of 4D. Of these QTLs, 35, 55, and 37 were associated with the three investigated nutrient concentration traits, four nutrient content traits, and three nutrient utilization efficiency traits, respectively. Six relatively high‐frequency QTLs (RHF‐QTLs) were detected in at least three treatments. A total of 16 QTL clusters (C1‐C16) harboring QTLs for at least three traits were identified, which involved 68 out of the 127 QTLs (53.5%). Some important QTLs/QTL clusters may be the potential targets for the marker‐assisted selection (MAS) of K efficiency in wheat.

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Wheat genotypes differ in potassium efficiency under glasshouse and field conditions

Cited by 86 publications

References 18 publications

Research on potassium in agriculture: needs and prospects

Research on potassium in agriculture: needs and prospects

Potassium applied under drought improves physiological and nutrient uptake performances of wheat (Triticum Aestivun L.)

Quantitative Trait Locus Mapping for Potassium Use Efficiency Traits at the Seedling Stage in Wheat under Different Nitrogen and Phosphorus Treatments

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