Development, growth and chemical composition of the potato crop (solanum tuberosum L.). II. Tuber and whole plant

Kolbe, Hartmut; Stephan-Beckmann, Sabine

doi:10.1007/bf02358240

Cited by 89 publications

(48 citation statements)

References 46 publications

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“…In the field trials with Fe and Zn fertilizer, the Pearson correlation coefficients between tuber mineral concentrations and yield were all negative and highly significant. Tuber bulking and increased yield diluted Zn and Fe in tuber tissue in agreement with previous studies (Kolbe and Stefan-Beckmann 1997;). Environmental and genetic factors that affect tuber size are, therefore, important to consider in any potato biofortification effort.…”

Section: −1supporting

confidence: 92%

Can Andean potatoes be agronomically biofortified with iron and zinc fertilizers?

Kromann¹,

Valverde

Alvarado

et al. 2016

Plant Soil

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Aims The aim of this study was to investigate the proofof-concept that Andean potato (Solanum tuberosum L., Andigenum Group) can be agronomically biofortified with iron (Fe) and zinc (Zn) fertilizers. Methods Greenhouse and field experiments were conducted in the Ecuadorian Andes with varying rates of foliar and soil applied Fe and Zn fertilizers to investigate the potential resulting increase in tuber Fe and tuber Zn concentrations.Results The study showed that simple fertilizer practices enhancing Zn supply to potato plants can increase tuber Zn concentrations. The rate of increase of tuber Zn following Zn fertilization was similar across cultivars. A concomitant negative effect of high rates of Zn applications on yield was not seen, and a maximum Zn application level for increasing tuber Zn concentration was not identified. A positive tuber yield effect was seen at one field site. High rates of foliar Zn application reached a 2.51-fold tuber Zn increase, and high rates of soil Zn application a 1.91-fold tuber Zn increase. The experiments showed no positive correlation between Fe fertilization and Fe concentration in tubers. Moreover, the study showed a strong effect of site on the concentration of Fe and Zn in tubers, and the tuber mineral concentrations across sites and treatments were negatively correlated with tuber yield. Conclusions The results confirmed the proof of concept that Andean potato cultivars can be agronomically Znbiofortified with foliar and soil applied Zn fertilizers. Tuber Fe concentrations of Andean potatoes were not increased with Fe fertilization.

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Section: −1supporting

confidence: 92%

Can Andean potatoes be agronomically biofortified with iron and zinc fertilizers?

Kromann¹,

Valverde

Alvarado

et al. 2016

Plant Soil

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“…The starch measurements shown in Table 2 can be used to calculate the¯ux control coecient for AGPase on the rate of starch accumulation. Since the starch accumulates linearly with time during tuber development (Kolbe and Stephan-Beckmann 1997), the starch content of the tuber at any time point gives an estimate of the rate of accumulation. In order to calculate the¯ux control coecient of AGPase on the rate of starch accumulation we measured the starch content and AGPase activity in replicate samples from the same tubers, and have plotted the natural logarithm of tuber starch content against the natural logarithm of AGPase activity in Fig.…”

Section: Resultsmentioning

confidence: 99%

The contribution of adenosine 5′-diphosphoglucose pyrophosphorylase to the control of starch synthesis in potato tubers

Sweetlove

Müller‐Röber

Willmitzer

et al. 1999

Planta

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The aim of this work was to investigate the extent to which starch synthesis in potato (Solanum tuberosum L.) tubers is controlled by the activity of ADPglucose pyrophosphorylase (EC 2.7.7.27; AGPase). In order to do this, fluxes of carbohydrate metabolism were measured in tubers that had reduced AGPase activity as a result of the expression of a cDNA encoding the B subunit in the antisense orientation. Reduction in AGPase activity led to a reduction in starch accumulation, and an increase in sucrose accumulation. The control coefficient of AGPase on starch accumulation in intact plants was estimated to be around 0.3. The fluxes of carbohydrate metabolism were measured in tuber discs from wild-type and transgenic plants by investigating the metabolism of [U-(14)C]glucose. In tuber discs, the control coefficient of AGPase over starch synthesis was estimated as 0.55, while the control coefficient of the enzyme over sucrose synthesis was -0.47. The values obtained suggest that AGPase activity exerts appreciable control over tuber metabolism in potato.

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“…Since starch accumulation is linear over time during potato tuber development the starch content at any time point will be representative of its accumulation (Kolbe and Stephan-Beckmann 1997;Sweetlove et al 1999). We therefore measured the starch content and the plastidial PGM activities in replicate samples from the same tubers.…”

Section: Carbohydrate Contents Of Tubersmentioning

confidence: 99%

The contribution of plastidial phosphoglucomutase to the control of starch synthesis within the potato tuber

Fernie¹,

Roessner²,

Trethewey³

et al. 2001

Planta

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The aim of this work was to evaluate the extent to which plastidial phosphoglucomutase (PGM) activity controls starch synthesis within potato (Solanum tuberosum L. cv. Desirée) tubers. The reduction in the activity of plastidial PGM led to both a correlative reduction in starch accumulation and an increased sucrose accumulation. The control coefficient of plastidial PGM on the accumulation of starch was estimated to approximate 0.24. The fluxes of carbohydrate metabolism were measured by investigating the metabolism of [U-14C]glucose in tuber discs from wild-type and transgenic plants. In tuber discs the control coefficient of plastidial PGM over starch synthesis was estimated as 0.36, indicating that this enzyme exerts considerable control over starch synthesis within the potato tuber.

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Development, growth and chemical composition of the potato crop (solanum tuberosum L.). II. Tuber and whole plant

Cited by 89 publications

References 46 publications

Can Andean potatoes be agronomically biofortified with iron and zinc fertilizers?

Can Andean potatoes be agronomically biofortified with iron and zinc fertilizers?

The contribution of adenosine 5′-diphosphoglucose pyrophosphorylase to the control of starch synthesis in potato tubers

The contribution of plastidial phosphoglucomutase to the control of starch synthesis within the potato tuber

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