Effect of magnesium fertilization on glycoalkaloid formation in potato tubers

Evans, Duane; Mondy, Nell I.

doi:10.1021/jf00123a010

Cited by 9 publications

(5 citation statements)

References 10 publications

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“…Mondy and Ponnampalam (1985) observed a significant increase of the glycoalkaloid concentration in tubers (17 vs. 9 mg 100 g −1 FM) after application of 56 kgMgO per ha. This principally agrees with earlier reports of Evans and Mondy (1984) based on 2-year field experiments showing a significant increase of total glycoalkaloid content of tubers at all levels of fertilization (0-112 kgha −1 ). The authors suggested that the increase in chlorophyll synthesis, the stimulation of sugar metabolism and/or the increase in amino acid production may be involved in this effect.…”

Section: Potato (Solanum Tuberosum L)supporting

confidence: 93%

“…The maximal total amino acid concentration was observed at 45 kgMgOha −1 . At this Mg dose the total glycoalkaloid concentration also approached maximum levels (Evans and Mondy 1984). However, more recent studies by Rogozinska and Wojdyla (1999) based on 3-year field experiments showed no influence of Mg supply on glycoalkaloid concentration of potato tubers.…”

Section: Potato (Solanum Tuberosum L)mentioning

confidence: 72%

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The significance of magnesium for crop quality

2013

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Background The quality of agricultural and horticultural products and its modulation by fertilization has increasingly received attention. However, whereas the importance of magnesium (Mg) as an essential plant nutrient is well established, the impact of Mg nutrition on quality parameters has only been rarely addressed. Scope This review aims at evaluating the available knowledge on the influence of Mg on produce quality. A short discussion on the term quality as used in this review is followed by an overview of the various functions of Mg in plant metabolism in relation to quality aspects. Finally, the available literature on Mg-associated effects on crop quality is critically surveyed. The question whether Mg application beyond yield optimum further improves crop quality is specifically addressed. Conclusion Increasing Mg supply on Mg-deficient sites tends to increase the quality of agricultural crops, particularly when the formation of quality traits is dependent on Mg-driven photosynthesis and assimilate translocation within the plant. In fruits and vegetables, ratios of Mg to other nutrients like Ca and K were shown to be a more reliable indicator of the quality response than the Mg status alone. Moreover, it is concluded that Mg doses beyond those required for maximum yield rarely induce a further improvement of produce quality.

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Section: Potato (Solanum Tuberosum L)supporting

confidence: 93%

Section: Potato (Solanum Tuberosum L)mentioning

confidence: 72%

The significance of magnesium for crop quality

2013

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“…This theory is supported by reports referring to the same field experiments, where it was shown that Mg application increased both the total N and the protein concentration (Klein et al 1982;Mondy and Ponnampalam 1985). Thereby, the maximal total amino acid concentration correlated with the maximal total glycoalkaloid concentration (Evans and Mondy 1984). However, contradictory results were described by Rogozińska and Wojdya (1999).…”

Section: Magnesiumsupporting

confidence: 59%

“…Numerous reports are available on the effect of Mg supply on glycoalkaloid accumulation in potato tubers. Evans and Mondy (1984) as well as Mondy et al (1987) observed a significant increase in glycoalkaloid concentration in tubers (see Table 1). The authors suggested that this is due to a stimulation of sugar metabolism, and/or an increase in amino acid production.…”

Section: Magnesiummentioning

confidence: 89%

The Importance of Nutrient Management for Potato Production Part II: Plant Nutrition and Tuber Quality

et al. 2019

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The term 'quality' is a complex parameter in the field of potato production, and the desired quality traits depend on the intended use. Important internal quality traits for potatoes are tuber flesh discolouration, dry matter, and starch content. External quality traits include tuber size and shape as well as resistance against mechanical stress during and after harvest. These quality traits are closely interrelated and genetically controlled. It has been demonstrated that all these parameters are also linked to the nutrient status of the plant and/or the tubers. For instance, the susceptibility of tubers for discolouration of both fresh market and processed cultivars is closely related not only to the nutrient supply but also to post-harvest treatment. Besides, the potential to form carcinogenic compounds like acrylamide from precursors during the deep-frying of potato products and the accumulation of toxic substances like glycoalkaloids are important quality criteria in terms of food safety. The influence of the supply of nutrients on potato tuber quality depends initially on their physiological functions, but the ratio to other nutrient needs should also be taken into account.

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“…Mondy and Ponnampalam (1985) and Klein et al (1982) reported an increased N and protein concentration. Additionally, Evans and Mondy (1984) and Mondy and Ponnampalam (1985) described a significant increase in glycoalkaloid content after Mg application. Within these results, a hypothesis is raised that increased chlorophyll synthesis, as well as stimulation of sugar metabolism and/or changes in amino acid production, are part of this effect.…”

Section: Potatomentioning

confidence: 94%

Role of magnesium fertilisers in agriculture: plant–soil continuum

et al. 2015

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Abstract. In this review, we summarise factors contributing to plant availability of magnesium (Mg) in soils, the role of Mg in plant physiological processes related to yield formation and abiotic stress tolerance, and soil and fertiliser parameters related to Mg leaching in fertilised soils. Mg is a common constituent in many minerals, comprising 2% of Earth's crust; however, most soil Mg (90-98%) is incorporated in the crystal lattice structure of minerals and thus not directly available for plant uptake. Plants absorb Mg from the soil solution, which is slowly replenished by soil reserves. Duration and intensity of weathering, soil moisture, soil pH, and root-microbial activity in soil are key factors that determine plant-available Mg release from soils. On the other hand, the amount of Mg released from soil minerals is generally small compared with the amounts needed to sustain high crop yield and quality. Thus, in many agro-ecosystems, application of Mg fertilisers is crucial. Magnesium is involved in many physiological and biochemical processes; it is an essential element for plant growth and development and plays a key role in plant defence mechanisms in abiotic stress situations. An early effect of Mg deficiency in plants is the disturbed partitioning of assimilates between roots and shoots because the supply of sink organs with photosynthetic products is impaired, and sugars accumulate in source leaves. Thus, optimal supply of Mg is required to improve crop tolerance to various stresses and to increase yield and quality parameters of harvested products. Unlike other cations, Mg is very mobile in soils because it is less bound to the soil charges. Therefore, Mg losses by leaching might occur in sandy soils with high water conductivity. Leaching of Mg in soils when applied with various water-soluble fertilisers may also vary depending on the fertiliser's chemical composition, granule size, and effect on soil pH and cation balance, as we discuss in detail.

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Effect of magnesium fertilization on glycoalkaloid formation in potato tubers

Cited by 9 publications

References 10 publications

The significance of magnesium for crop quality

The significance of magnesium for crop quality

The Importance of Nutrient Management for Potato Production Part II: Plant Nutrition and Tuber Quality

Role of magnesium fertilisers in agriculture: plant–soil continuum

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