Effects of 1-Methylcyclopropene and Controlled Atmosphere on Ethylene Synthesis and Quality Attributes of Avocado cvs. Edranol and Fuerte
Table 9
Evaluation of physiological disorders in “Edranol” avocado under different storage conditions for 30 and 50 days at 5°C.
Variable
Harvest
Treatment
Storage time (days)
30 d
30 + SL
50 d
50 + SL
Mean
SD
Mean
SD
Mean
SD
Mean
SD
External damage (%)
I
RA
77.1
±
14.3b
94.3
±
0.0b
92.4
±
1.7c
100.0
±
0.0c
CA
0.0
±
0.0a
0.0
±
0.0a
1.0
±
1.7a
2.9
±
2.9a
RA + 1-MCP
0.0
±
0.0a
0.0
±
0.0a
34.3
±
10.3b
34.3
±
10.3b
II
RA
85.7
±
24.7b
87.6
±
21.4b
57.1
±
5.0c
85.7
±
7.6c
CA
0.0
±
0.0a
1.0
±
1.7a
1.0
±
1.7a
1.0
±
1.7a
RA + 1-MCP
0.0
±
0.0a
1.0
±
1.7a
34.3
±
10.3b
39.0
±
16.3b
Gray pulp (%)
I
RA
0.0
±
0.0a
24.8
±
3.3b
4.8
±
1.7b
12.4
±
9.2b
CA
0.0
±
0.0a
0.0
±
0.0a
0.0
±
0.0a
0.0
±
0.0a
RA + 1-MCP
0.0
±
0.0a
1.0
±
1.7a
0.0
±
0.0a
0.0
±
0.0a
II
RA
1.0
±
1.7a
3.8
±
4.4a
20.0
±
15.1b
56.2
±
22.3b
CA
0.0
±
0.0a
0.0
±
0.0a
0.0
±
0.0a
1.0
±
1.7a
RA + 1-MCP
0.0
±
0.0a
0.0
±
0.0a
0.0
±
0.0a
1.0
±
1.7a
Vascular browning (%)
I
RA
0.0
±
0.0a
16.2
±
7.2a
13.3
±
9.2b
35.2
±
9.2b
CA
0.0
±
0.0a
6.7
±
7.2a
0.0
±
0.0a
0.0
±
0.0a
RA + 1-MCP
0.0
±
0.0a
3.8
±
6.6a
0.0
±
0.0a
0.0
±
0.0a
II
RA
0.0
±
0.0a
6.7
±
6.0b
11.4
±
12.5b
41.9
±
15.0b
CA
0.0
±
0.0a
1.0
±
1.7a
1.0
±
1.7a
2.9
±
2.9a
RA + 1-MCP
0.0
±
0.0a
0.0
±
0.0a
0.0
±
0.0a
1.0
±
1.7a
Interaction
External damage (%)
Gray pulp (%)
Vascular browning (%)
Treatment (A)
<0.0001
<0.0001
<0.0001
Storage time (B)
<0.0001
<0.0001
<0.0001
Harvest (C)
0.2562
0.0698
0.5361
A × B
<0.0001
<0.0001
<0.0001
A × C
0.1244
0.1062
0.6971
B × C
0.0342
<0.0001
0.0107
A × B × C
0.0347
<0.0001
0.9898
RA: regular air (85% relative humidity); CA: controlled atmosphere (4% O2 + 6% CO2); 1-MCP: 1-methylcyclopropene (300 ppb); s.d: standard deviation. I: early maturity stage; II: advanced maturity stage; d: days at 5°C. SL (shelf life): fruit storage at 20°C. Fruit at SL was evaluated at the same flesh firmness level. Each value corresponds to mean of 35 fruits. Different letters within each storage time and harvest represent significant differences at as determined by the LSD test. Factor: treatment: RA, CA, and RA + 1-MCP. Storage time: fruits storage for 30 and 50 days at 5°C. Harvest: two harvest, early and advanced maturity stages. Sample significant, .