Sampling and analysis for determining relationship of calcium concentration to bitter pit in apple fruit

Turner, N. A.; Ferguson, Ian B.; Sharples, R. O.

doi:10.1080/00288233.1977.10427369

Cited by 53 publications

(29 citation statements)

References 14 publications

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“…Unless otherwise indicated, mineral analyses were done on plugs (up to 5 g freshweight (FW)) of outer cortical fruit flesh, taken from equatorial slices, the sample usually being bulked from 20 plugs from either 10 (two plugs per fruit), or20 (one plug per fruit) fruit. Tissue was digested and analysed by atomic absorption spectrophotometry as described by Turner et al (1977). For assessment of storage disorders, fruit was held at 3°C for 6 weeks after harvest, then for 2 weeks at ambient temperatures.…”

Section: Methodsmentioning

confidence: 99%

“…The data obtained have been used to classify orchards according to the risk of their fruit developing the storage disorder bitter pit. The scheme is based on sampling and analytical techniques established by Turner et al (1977) and Ferguson et al (1979), and involves sampling fruit before harvest, analysis of plugs of cortical tissue for Ca, Mg, and K, and assessment of bitter pit incidence in fruit after cool storage.…”

Section: Introductionmentioning

confidence: 99%

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Sampling factors affecting the use of mineral analysis of apple fruit for the prediction of bitter pit

Ferguson¹,

Triggs

1990

New Zealand Journal of Crop and Horticultural Science

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Several aspects of the sampling of apple fruit for mineral analysis and prediction of bitter pit incidence were studied. Variability of mineral analyses can be minimised, and precision of bitter pit prediction increased, by sampling fewer fruit per tree from a large number of trees. Less variability in Ca analysis was found by taking two opposite plugs of cortical tissue from each fruit. Fruits from the upper parts of trees had less Ca and a higher incidence of bitter pit. If a high proportion of fruit in the crop are from these sites, then a sampling scheme which excludes them may result in less accurate predictions. The relationship between fruit Ca concentration and fruit size varied with the crop load on tree tree. In heavily laden trees, the decrease in Ca concentration with increasing fruit weight was half that in lightly laden trees. The relationships between fruit size and both bitter pit incidence and Ca concentration were sufficiently strong to be useful in standardising sampling schemes for analysis and prediction.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sampling factors affecting the use of mineral analysis of apple fruit for the prediction of bitter pit

Ferguson¹,

Triggs

1990

New Zealand Journal of Crop and Horticultural Science

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“…For mineral assessments carried out in 1999 and 2001, a transverse equatorial tissue slice was cut across each of the ten fruit and two cortical plug samples taken from opposite side of each slice, immediately below the skin. These plugs were bulked together for each sample (Turner et al, 1977). Calcium, magnesium and potassium were analysed by digestion in nitric and perchloric acids and atomic absorption spectrophotometry.…”

Section: Harvest and Fruit Evaluationmentioning

confidence: 99%

Genetic variation in bitter pit and fruit calcium concentrations within a diverse apple germplasm collection

et al. 2006

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Genetic variability in the apple [Malus] fruit disorder bitter pit and fruit calcium concentrations ([Ca]) was determined in 25 seedling families at each of two sites from 1999 to 2000 and again for one site, in 2001. Most trees were free of pit or had low pit incidence, which could be approximated by an over-dispersed binomial distribution. A genetic component to external and internal pit incidence was found across both sites and all years. This effect was irrespective of the use of several cropping factors, average fruit weight or fruit mineral concentrations as covariates in the analyses. Year and/or site always had substantial effects on pit incidence. Interactions of genetic effects with site or year were also detected with large differences in mean pit incidence between sites or years for some families but not others. No relationship was found between mean family pit incidence and mean family [Ca] or mean family harvest date. However fruit [Ca] and harvest date were usually important predictors of within-family variation in pit incidence. For any one seedling, family had the largest effect on bitter pit incidence followed by site and [Ca] and the smallest effect was that of harvest date.[Ca] showed a strong genetic component and estimated family means of [Ca] were consistent at different sites and years. These results suggest that susceptibility of apple genotypes to bitter pit in breeding programmes may be best assessed through screening across multiple sites and seasons. Fruit [Ca] might be useful as an indirect selection index for bitter pit within, but not among families.

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“…Oft nimmt der Ca-Gehalt der Früchte gar nicht zu, oder die Zunahme überschreitet nicht 0,5-1,0 mg/100 g Frischmasse (FM; Link 1998). Tomala u. Dilley (1990) Turner et al (1977) ergaben 11 Spritzungen mit 1% Ca-Nitrat eine Steigerung von 3,0 auf 4,8 bzw. von 1,6 auf 3,2 mg/100 g FM, d. h. um 60 bzw.…”

Section: Aufnahme üBer Die Fruchtoberflächeunclassified

Die Kalziumversorgung von Äpfeln in Abhängigkeit von pflanzlichen Regelungsvorgängen

Saure

2005

Erwerbs-Obstbau

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Sampling and analysis for determining relationship of calcium concentration to bitter pit in apple fruit

Cited by 53 publications

References 14 publications

Sampling factors affecting the use of mineral analysis of apple fruit for the prediction of bitter pit

Sampling factors affecting the use of mineral analysis of apple fruit for the prediction of bitter pit

Genetic variation in bitter pit and fruit calcium concentrations within a diverse apple germplasm collection

Die Kalziumversorgung von Äpfeln in Abhängigkeit von pflanzlichen Regelungsvorgängen

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