Articles
Postharvest ethylene and near infrared spectra to predict apricot storage ability
Article number
1450_27
Pages
207 – 214
Language
English
Abstract
Near infrared (NIR) spectroscopy is effective in predicting some quality parameters of apricot fruit, but spectra have not yet been able to characterize climacteric behaviour or ethylene production.
In France and New Zealand, ethylene kinetics were carried out during postharvest ripening and/or cold storage to evaluate NIR spectra capacity to predict postharvest behaviour.
Six apricot cultivars, including three defined as non-climacteric, were monitored for several days at 23°C after harvest or after 15 days of storage at 7 or 1°C in 2016, with a repeat in 2017 on two non-climacteric genotypes.
For each cultivar, fruit were sorted according to their firmness.
Homogeneous batches were prepared for each storage condition.
Ethylene was measured on individual fruit and NIR spectra were acquired non-destructively on all fruit at harvest, after cold storage and post-storage at room temperature. ‘Goldrich’ fruit held at 23°C straight from harvest produced significantly more ethylene after 5 days than ‘Orangered® Bhart’ and ‘Bergeron’. Immediately after cold storage, ethylene production remained minimal but increased post-storage, especially for ‘Goldrich’. The non-climacteric types (A4034, A3976 and ’Nzsummer3’) displayed low ethylene production rates as expected, but in some cases, ethylene production was detected for a short period, especially just out of cold storage.
Functional differential analysis (FDA) on NIR spectra highlighted differences between genotypes according to their ethylene pathways, with less-separate groups for storage time for high-ethylene producers.
This work confirms our previous work on postharvest ethylene typology, specifically for “non-climacteric” genotypes, which ripen slowly without measurable ethylene but produce some ethylene after cold storage or stress.
NIR could be a useful tool in breeding and selection evaluations for discriminating postharvest capacity of apricots but more analysis is necessary to confirm this.
Commercial use for separating fruit within a cultivar for storage life is an aspirational goal.
In France and New Zealand, ethylene kinetics were carried out during postharvest ripening and/or cold storage to evaluate NIR spectra capacity to predict postharvest behaviour.
Six apricot cultivars, including three defined as non-climacteric, were monitored for several days at 23°C after harvest or after 15 days of storage at 7 or 1°C in 2016, with a repeat in 2017 on two non-climacteric genotypes.
For each cultivar, fruit were sorted according to their firmness.
Homogeneous batches were prepared for each storage condition.
Ethylene was measured on individual fruit and NIR spectra were acquired non-destructively on all fruit at harvest, after cold storage and post-storage at room temperature. ‘Goldrich’ fruit held at 23°C straight from harvest produced significantly more ethylene after 5 days than ‘Orangered® Bhart’ and ‘Bergeron’. Immediately after cold storage, ethylene production remained minimal but increased post-storage, especially for ‘Goldrich’. The non-climacteric types (A4034, A3976 and ’Nzsummer3’) displayed low ethylene production rates as expected, but in some cases, ethylene production was detected for a short period, especially just out of cold storage.
Functional differential analysis (FDA) on NIR spectra highlighted differences between genotypes according to their ethylene pathways, with less-separate groups for storage time for high-ethylene producers.
This work confirms our previous work on postharvest ethylene typology, specifically for “non-climacteric” genotypes, which ripen slowly without measurable ethylene but produce some ethylene after cold storage or stress.
NIR could be a useful tool in breeding and selection evaluations for discriminating postharvest capacity of apricots but more analysis is necessary to confirm this.
Commercial use for separating fruit within a cultivar for storage life is an aspirational goal.
Publication
Authors
B. Gouble, C. Scofield, J. Stanley, J.-M. Audergon, S. Bureau
Keywords
Prunus armeniaca, near infrared spectroscopy, cold storage, climacteric behaviour
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