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Table 2 Differential accumulated primary metabolites in heat treated pericarp compared to control pericarp

From: Comparative proteomic and metabolomic profiling of citrus fruit with enhancement of disease resistance by postharvest heat treatment

Sugars

2 h

1 d

6 d

32 d

Turanose

1.19 *

1.13

1.36 *

1.25 *

Galactose

1.44 *

1.59 *

1.09

1.17

Fructose

1.29 *

1.36 *

1.02

1.08

Glucose

1.4 *

1.51 *

1.06

1.14

Sucrose

1.21 *

1.09

1.07

1.19

4-Keto-glucose

1.59 *

1.09

1.43 *

0.84

Arabinose

1.36 *

0.71 *

1.23 *

0.18 *

Mannose

1.06

1.11

0.88

0.73 *

Xylose

0.82 *

1.37 *

0.82 *

0.98

Glucopyranose

0.81 *

2.09 *

0.84

1.41 *

Organic acids

2 h

1 d

6 d

32 d

Pentonic acid

1.77 *

0.78 *

1.04

1.46 *

Succinic acid

1.13

1.2 *

1.26 *

1.54 *

Hydroxypyruvic acid

1.16

1.07

1.28 *

0.71 *

2-Ketoglutaric acid

1.06

1.1

0.65 *

1.31 *

2-Keto-d-gluconic acid

1.05

1.56 *

1.13

2.52 *

Gluconic acid

1

1.81 *

0.92

1.04

Isocitric acid

0.85

2.1 *

1.11

1.15

2,3,4-Trihydroxybutyric acid

0.84

1.67 *

0.61 *

1.2 *

Ethanedioic acid

0.83 *

1.26 *

1.11

1.55 *

Citric acid

0.83 *

1.53 *

1.22 *

1.92 *

Malic acid

0.63 *

1

0.77 *

1.41 *

4-N-Trimethylsilylmethylaminobutyric acid

0.56 *

1.03

0.76 *

1.33 *

GABA

0.41 *

1.23 *

0.76 *

1.25 *

Amino acids

2 h

1 d

6 d

32 d

Ornithine

2.63 *

3.69 *

2.34 *

2.87 *

Valine

0.48 *

0.99

0.46 *

0.7 *

5-oxo-L-proline

0.45 *

1.08

0.73 *

1.14

Glycine

0.37 *

1.42 *

0.65 *

1.44 *

Alanine

0.31 *

2.22 *

0.69 *

1.25 *

Threonine

0.29 *

1.12

0.47 *

0.92

Aspartic acid

0.14 *

0.99

0.35 *

0.8 *

L-proline

0.13 *

0.99

0.19 *

0.65 *

Serine

0.13 *

1.27 *

0.2 *

0.64 *

Glutamine

0.11 *

0.86

0.3 *

0.73 *

Asparagine

0.03 *

0.34 *

0.25 *

0.89

Alcohols

2 h

1 d

6 d

32 d

Glycerol

1.61 *

1.2 *

0.91

2.23 *

Arabitol

1.05

1.04

0.39 *

0.92

Rhamnitol

0.98

0.97

0.76 *

1.73 *

Sorbitol

0.94

0.68 *

1.87 *

1.8 *

Fatty acids

2 h

1 d

6 d

32 d

Oleic acid

UP *

UP *

UP *

UP *

Tetradecanoic acid

UP *

UP *

UP *

UP *

Octadecanoic acid

0.65 *

1.11

0.94

1.66 *

9,12-Octadecadienoic acid

0.57 *

0.84

1.05

0.93

Hexadecanoic acid

0.62 *

1.06

0.99

1.38 *

Hexadecanoic acid,2,3-bisoxypropylester

0.68 *

0.39 *

0.81 *

2.18 *

Others

2 h

1 d

6 d

32 d

Phosphate

0.89

1.48 *

1.33 *

1.48 *

  1. Samples at 2 h after treatment and 1, 6 and 32 d after harvest were used for the differential primary metabolic profiling analysis. A 300 mg sample was extracted in 2,700 μl of methanol. Extracts were determined with GC-MS used ribitol as internal standard. A total of 45 metabolites were differentially accumulated in heat treated pericarp. This table shows the ratio (HT/control during the same period of storage). *: significant difference (P <0.05). UP: metabolite was detected in the heat treated pericarp but not in the control pericarp.