TY - JOUR
T1 - Controlled Atmosphere Storage Alleviates Hass Avocado Black Spot Disorder
AU - Fuentealba, Claudia
AU - Vidal, Juan
AU - Zulueta, Claudio
AU - Ponce, Excequel
AU - Uarrota, Virgilio
AU - Defilippi, Bruno G.
AU - Pedreschi, Romina
N1 - Funding Information:
Funding: This research was funded by the Comité de Paltas Chile and associated producers and exporters (Santa Cruz, El Parque, Jorge Schmidt, Baika, Subsole).
Publisher Copyright:
© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/).
PY - 2022/5
Y1 - 2022/5
N2 - As it was previously reported, black spot development in the skin of Hass avocado has been related to a decreased antioxidant defense system. The aim of this study was to investigate the effect of different postharvest storage conditions on controlling black spot development targeting their effect on the antioxidant system (non-enzymatic and enzymatic) of the skin. Four postharvest treatments (T1: regular air storage (RA) at 5◦C for 40 d; T2: controlled atmosphere storage (CA) of 4 kPa O2 and 6 kPa CO2 at 5◦C for 40 d; T3: 10 d RA + 30 d CA and T4: 5 µM methyl jasmonate (MeJA) for 30 s + 10 RA + 30 d CA) were tested on controlling black spot incidence in fruit from six orchards from different agroclimatic zones and harvests. Then, on two selected orchards and harvests, the evolution of total phenolics (TPC), antioxidant capacity (AC) and antioxidant enzymes (catalase (CAT), polyphenol oxidase (PPO), superoxide dismutase (SOD), peroxidase (POD), phenylalanine ammonia lyase (PAL)) was monitored. Results revealed that incidence of black spot disorder was not associated to an agroclimatic zone and harvest stage. Immediate application of CA (T2) controlled black spot development during prolonged storage (40 d) and under these conditions TPC content remained higher compared to the other treatments. No clear role of CAT, PPO, SOD, POD and PAL on controlling black spot was observed. The results obtained are of value for the Hass avocado supply chain since a clear performance of CA was evidenced that will result in reduction of postharvest losses associated to this problem.
AB - As it was previously reported, black spot development in the skin of Hass avocado has been related to a decreased antioxidant defense system. The aim of this study was to investigate the effect of different postharvest storage conditions on controlling black spot development targeting their effect on the antioxidant system (non-enzymatic and enzymatic) of the skin. Four postharvest treatments (T1: regular air storage (RA) at 5◦C for 40 d; T2: controlled atmosphere storage (CA) of 4 kPa O2 and 6 kPa CO2 at 5◦C for 40 d; T3: 10 d RA + 30 d CA and T4: 5 µM methyl jasmonate (MeJA) for 30 s + 10 RA + 30 d CA) were tested on controlling black spot incidence in fruit from six orchards from different agroclimatic zones and harvests. Then, on two selected orchards and harvests, the evolution of total phenolics (TPC), antioxidant capacity (AC) and antioxidant enzymes (catalase (CAT), polyphenol oxidase (PPO), superoxide dismutase (SOD), peroxidase (POD), phenylalanine ammonia lyase (PAL)) was monitored. Results revealed that incidence of black spot disorder was not associated to an agroclimatic zone and harvest stage. Immediate application of CA (T2) controlled black spot development during prolonged storage (40 d) and under these conditions TPC content remained higher compared to the other treatments. No clear role of CAT, PPO, SOD, POD and PAL on controlling black spot was observed. The results obtained are of value for the Hass avocado supply chain since a clear performance of CA was evidenced that will result in reduction of postharvest losses associated to this problem.
KW - antioxidant activity
KW - epicarp
KW - phenolics
KW - quality attributes
UR - http://www.scopus.com/inward/record.url?scp=85129741262&partnerID=8YFLogxK
U2 - 10.3390/horticulturae8050369
DO - 10.3390/horticulturae8050369
M3 - Article
AN - SCOPUS:85129741262
VL - 8
JO - Horticulturae
JF - Horticulturae
SN - 2311-7524
IS - 5
M1 - 369
ER -