Figures & data
Table 1. A list of the onion cultivars used and the ID each batch was given.
Table 2. The sowing dates for the sampled onions and the pH, content of clay, sand and organic matter in soil samples from the fields where the onions were grown.
Figure 1. Examples of bulbs deemed to be sprouting (A) and not yet sprouting (B).
Table 3. The average firmness of onion bulbs of the cultivars ‘Hystore’ (HYS), ‘Hytech’ (HYT) and ‘Saskia’ (SAS) harvested in 2019 (19) or 2020 (20) from 13 fields (a-m) in Skåne, Sweden.
Table 4. Sprouting in onion bulbs of the cultivars ‘Hystore’ (HYS), ‘Hytech’ (HYT) and ‘Saskia’ (SAS) harvested in 2019 (19) or 2020 (20) from 13 fields (a-m) in Skåne, Sweden.
Figure 2. The relation between the percentage of sprouted onion (Allium cepa L.) bulbs and the contents of fructose, glucose and sucrose (expressed as HPLC peak area). Bulbs were harvested in 2019 and 2020, and sugar content was measured once a month from October until June using HPLC.
Figure 3. The amounts of fructose (A), glucose (B) and sucrose (C) found when sugars were extracted from homogenised and lyophilised onion bulbs collected from storage facilities from October (1) until June (9). Data shown as HPLC chromatogram peak area per mg extracted dry onion. Error bars represent the average value (n = 4) ± the standard deviation for the sample.
Table 5. The measured dry matter content of onion bulbs of the cultivars ‘Hystore’ (HYS), ‘Hytech’ (HYT) and ‘Saskia’ (SAS) harvested in 2019 (19) or 2020 (20) from 13 fields (a-m) in Skåne, Sweden.
Table 6. Pairwise Pearson correlations for the dry matter and mineral content in onion bulbs during storage.
Data availability statement
The data that support the findings of this study are available from the corresponding author, IK, upon reasonable request.