Modelling the influence of storage temperature and time after cutting on respiration rate of diced red onions ( Allium cepa L. cv. Vermelha da Póvoa )

2018 ◽  
Vol 140 ◽  
pp. 27-33 ◽  
Author(s):  
Susana C. Fonseca ◽  
Luísa Gil ◽  
Maria C. Manso ◽  
Luís M. Cunha
Keyword(s):  
Respiration Rate ◽  
Allium Cepa ◽  
Storage Temperature ◽  
Allium Cepa L

scholarly journals Effect of maleic hydrazide on respiratory parameters of stored onion bulbs (Allium cepa L.)

2004 ◽  
Vol 16 (1) ◽  
pp. 47-52 ◽  
Author(s):  
Noureddine Benkeblia
Keyword(s):  
Activation Energy ◽  
Respiration Rate ◽  
Allium Cepa ◽  
Maleic Hydrazide ◽  
Co2 Production ◽  
Onion Bulbs ◽  
Respiratory Parameters ◽  
Allium Cepa L ◽  
Significant Difference ◽  
And Control

The respiration rate (RR) (CO2 production), activation energy (Ea) and Q10 of maleic hydrazide-treated onion bulbs (Allium cepa, cv. Rouge Amposta) at 20.10-6 mol.L-1 (MH1) and 45.10-6 mol.L-1 (MH2) were measured at 4, 10 and 20ºC. Immediately after treatment, the Q10 of MH-treated and control bulbs were not significantly different. After 8 weeks of storage, Q10 of control and both MH-treated bulbs increased and ranged from 2.34 and 2.89. Respiration rate of onions increased during storage, and after 24 weeks, RR values of control, MH1 and MH2 were 0.43, 0.32 and 0.26 mmol CO2.kg-1.h-1 at 20ºC respectively; and 0.26, 0.20 and 0.17 mmol CO2.kg-1.h-1 at 10ºC respectively. At 4ºC, no significant difference was observed between control and MH-treated bulbs. After 24 weeks, sprouting of the control and MH1 and MH2-treated bulbs was 75%, 38% and 33% at 20ºC respectively, and 50%, 22% and 17% at 10ºC respectively. At 4ºC, the sprouting level of control bulbs did not exceed 7% and was 5% for MH-treated bulbs. No difference was observed in rotting of control and MH-treated bulbs, and the low rotting observed at 4ºC could be attributed to low temperature rather than maleic hydrazide treatment.

scholarly journals Effect of Anoxia on Respiration Rate (Fermentative Index) and Ethanol Production of Onion Bulbs (Allium cepa L.)

2003 ◽  
Vol 9 (1) ◽  
pp. 5 ◽  
Author(s):  
N. Benkeblia ◽  
N. Shiomi
Keyword(s):  
Carbon Dioxide ◽  
Ethanol Production ◽  
Respiration Rate ◽  
Allium Cepa ◽  
Average Rate ◽  
Carbon Dioxide Production ◽  
Co2 Production ◽  
Temperature Dependent ◽  
Onion Bulbs ◽  
Allium Cepa L

The physiological behavior, including carbon dioxide production, fermentative index (FI) and ethanolic production of onion bulbs kept under total anoxia (l00% N2) was investigated. During the first 24 hours, carbon dioxide production increased from 0.01 to 1.56 kPa Co2, and the average rate of the increase in CO2; production between 0 and 24 hours was 0.09 kPa/h. The Q10, of the fermentative index was l.9. Ethanol produced by onion bulbs kept under anoxia during 6 hours was temperature dependent, and was 0.563 and 0.760 pmol kg-1h-1 at 10 and 20°C respectively, while at 4°C the quantity produced was not detected. It is concluded that onion seems to be less tolerant to anoxia than other vegetables such as artichoke, cauliflower, tomato, potato and asparagus.  

scholarly journals The effect of storage temperature of steckling bulbs on seed stalk development and seed yield of shallot (Allium cepa L. var. ascalonicum Backer)

2013 ◽  
Vol 66 (3) ◽  
pp. 41-48
Author(s):  
Maria Tendaj ◽  
Barbara Mysiak ◽  
Marcela Krawiec
Keyword(s):  
Seed Production ◽  
Allium Cepa ◽  
Seed Yield ◽  
Storage Temperature ◽  
Local Population ◽  
Lower Percentage ◽  
Positive Effects ◽  
Highest Weight ◽  
Allium Cepa L ◽  
Different Diameters

The aim of this study, conducted in the years 2010–2012, was to evaluate bolting and seed production of shallot depending on storage temperature of steckling bulbs with different diameters. The present study included 4 cultivars (‘Toto’, ‘Ambition F<sub>1</sub>’, ‘Bonilla F<sub>1</sub>’, and ‘Matador F<sub>1</sub>’) and one local population (‘U’). Bulbs with the following diameters: 20–30 mm, 31–40 mm, 41–50 mm, and 51–60 mm, were stored from the first 10-day period of November (2010 and 2011) until the end of March (2011 and 2012) at a temperature of 0–1 <sup>o</sup>C, 4–6 <sup>o</sup>C, and 8–10 <sup>o</sup>C. After they were planted in the field (the second 10-day period of April), observations of bolting were carried out, while the weight of seed umbels and seed yield were determined only for the cultivar ‘Toto’ and the population ‘U’. The storage temperature of steckling bulbs in the range of 4–6 <sup>o</sup>C and 8–10 <sup>o</sup>C was most conducive to bolting, in particular in plants grown from large bulbs with a diameter above 40 mm. In the cultivar ‘Toto’, plants from bulbs with a diameter above 40 mm and stored at a temperature of 4–6 <sup>o</sup>C were characterized by the highest weight of seed umbels. This had an effect on obtaining the highest seed yield (on average 1604.16-2300.7 g per 100 m<sup>2</sup> of area). Shallot plants from the population ‘U’ grown from bulbs with a diameter of 20–30 mm were characterized by a distinctly lower percentage of bolting plants compared to the cultivars studied. For this reason, this population does not promise positive effects in shallot production for seed.

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