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Table 6 Content (mean ± SE) of identified compounds (mg g−1) in leaves of dominant and suppressed hybrid aspens in different thinning treatments

From: Secondary metabolites in leaves of hybrid aspen are affected by the competitive status and early thinning in dense coppices

Compound

Dominant trees

Suppressed trees

 

UT

C

CC

UT

C

CC

Dihydrochalcones

      

  Hesperetin dihydrochalcone-O-glucoside 1

0.12 ± 0.01

0.12 ± 0.01

0.10 ± 0.02

0.08 ± 0.01

0.23 ± 0.02

0.36 ± 0.02

  Hesperetin dihydrochalcone-O-glucoside 2

0.06 ± 0.01

0.06 ± 0.01

0.05 ± 0.01

0.07 ± 0.01

0.18 ± 0.02

0.26 ± 0.03

  Trihydroxy-methoxydihydrochalcone-O-glucoside 1

0.09 ± 0.02

0.07 ± 0.01

0.10 ± 0.02

0.40 ± 0.05

0.59 ± 0.13

0.88 ± 0.18

  Trihydroxy-methoxydihydrochalcone-O-glucoside 2

0.22 ± 0.03

0.20 ± 0.03

0.26 ± 0.05

0.37 ± 0.05

0.84 ± 0.13

1.31 ± 0.13

Flavonoids

      

 (Epi)gallocatechin

0.23 ± 0.04

0.43 ± 0.09

0.40 ± 0.09

0.12 ± 0.09

0.19 ± 0.06

0.27 ± 0.05

  Procyanidin B type

1.10 ± 0.08

1.40 ± 0.13

1.74 ± 0.13

0.38 ± 0.09

0.91 ± 0.18

1.84 ± 0.21

  Catechin and epicatechin

1.83 ± 0.26

3.02 ± 0.34

3.09 ± 0.22

0.43 ± 0.15

1.99 ± 0.46

3.16 ± 0.42

  Unk flavonoid 1

0.30 ± 0.01

0.43 ± 0.05

0.24 ± 0.01

0.18 ± 0.01

0.32 ± 0.03

0.22 ± 0.02

  Myricetin-3-O-glucuronide

0.76 ± 0.06

0.98 ± 0.07

0.93 ± 0.06

0.40 ± 0.01

0.70 ± 0.10

0.80 ± 0.04

  Myricetin-3-O- galactoside

0.61 ± 0.05

0.59 ± 0.09

0.60 ± 0.06

0.69 ± 0.08

0.76 ± 0.07

0.83 ± 0.06

  Myricetin-3-O-glucoside

0.78 ± 0.08

0.98 ± 0.11

1.00 ± 0.08

0.36 ± 0.01

0.59 ± 0.09

0.75 ± 0.05

  Unk flavonoid 2

0.54 ± 0.03

0.65 ± 0.04

0.43 ± 0.02

0.33 ± 0.05

0.61 ± 0.05

0.39 ± 0.05

 Quercetin-3-O-arabinoglucoside

0.92 ± 0.09

0.99 ± 0.10

0.91 ± 0.12

0.42 ± 0.09

0.88 ± 0.12

1.16 ± 0.10

  Myricetin-O-pentoside

0.75 ± 0.03

0.95 ± 0.05

0.91 ± 0.04

0.35 ± 0.01

0.55 ± 0.05

0.63 ± 0.05

  Quercetin-3-O-galacatoside

0.80 ± 0.02

0.98 ± 0.04

0.77 ± 0.03

0.21 ± 0.03

0.56 ± 0.06

0.46 ± 0.04

  Quercetin-3-O-glucuronide

2.02 ± 0.05

2.51 ± 0.08

1.93 ± 0.03

1.44 ± 0.08

2.26 ± 0.08

2.06 ± 0.04

  Quercetin-3-O-glucoside

0.68 ± 0.04

0.83 ± 0.06

0.71 ± 0.05

0.21 ± 0.04

0.58 ± 0.07

0.76 ± 0.05

  Kaempferol-O-rhamnosylhexoside

0.12 ± 0.01

0.10 ± 0.02

0.07 ± 0.01

0.07 ± 0.01

0.10 ± 0.01

0.10 ± 0.01

  Kaempferol-O-pentosylhexoside

0.11 ± 0.01

0.13 ± 0.01

0.09 ± 0.01

0.06 ± 0.01

0.11 ± 0.01

0.13 ± 0.01

  Quercetin-O-pentoside 1

0.47 ± 0.02

0.62 ± 0.03

0.51 ± 0.03

0.09 ± 0.01

0.32 ± 0.04

0.34 ± 0.05

  Kaempferol-3-O-galactoside

0.07 ± 0.004

0.09 ± 0.01

0.07 ± 0.01

0.02 ± 0.002

0.05 ± 0.01

0.05 ± 0.01

  Quercetin-O-pentoside 2

0.18 ± 0.01

0.24 ± 0.01

0.21 ± 0.02

0.03 ± 0.004

0.12 ± 0.02

0.16 ± 0.02

  Kaempferol-3-O-glucuronide

0.68 ± 0.03

0.95 ± 0.07

0.52 ± 0.02

0.40 ± 0.04

0.88 ± 0.06

0.71 ± 0.03

  Kaempferol-3-O-glucoside

0.15 ± 0.01

0.19 ± 0.03

0.16 ± 0.01

0.05 ± 0.01

0.12 ± 0.02

0.18 ± 0.01

Hydroxycinnamates

      

  cis 3-O-caffeoylquinic acid

2.04 ± 0.37

2.58 ± 0.28

1.91 ± 0.20

0.60 ± 0.10

1.96 ± 0.31

2.04 ± 0.30

  trans 3-O-caffeoylquinic acid

3.15 ± 0.30

3.48 ± 0.25

2.75 ± 0.23

1.00 ± 0.14

2.70 ± 0.31

2.74 ± 0.32

  5-p-O-coumaroylquinic acid

0.56 ± 0.09

0.77 ± 0.11

0.49 ± 0.06

0.26 ± 0.03

0.86 ± 0.12

0.85 ± 0.10

  3-p-O-coumaroylquinic acid

1.28 ± 0.13

1.62 ± 0.14

1.27 ± 0.09

0.36 ± 0.06

1.28 ± 0.17

1.37 ± 0.11

  5-O-caffeoylquinic acid

0.45 ± 0.07

0.84 ± 0.13

0.56 ± 0.08

0.18 ± 0.06

0.60 ± 0.16

0.67 ± 0.12

  4-O-caffeoylquinic acid

0.90 ± 0.18

0.59 ± 0.05

0.74 ± 0.10

0.21 ± 0.03

0.31 ± 0.05

0.63 ± 0.11

Jasmonates

      

  Hydroxyjasmonyl sulfate

1.10 ± 0.08

0.86 ± 0.10

0.84 ± 0.09

2.39 ± 0.30

1.32 ± 0.22

0.96 ± 0.11

  Hydroxyjasmonic acid glucoside

1.84 ± 0.06

1.72 ± 0.09

1.67 ± 0.07

2.48 ± 0.10

2.27 ± 0.15

1.96 ± 0.06

  Unidentified jasmonate

0.23 ± 0.01

0.22 ± 0.02

0.22 ± 0.01

0.22 ± 0.01

0.20 ± 0.02

0.20 ± 0.01

  Hydroxyl-dihydrojasmonic acids

0.18 ± 0.01

0.15 ± 0.01

0.17 ± 0.01

0.09 ± 0.01

0.10 ± 0.01

0.09 ± 0.01

Salicylates

      

  Salicin

1.40 ± 0.18

0.83 ± 0.11

1.29 ± 0.19

3.74 ± 0.33

3.14 ± 0.28

3.58 ± 0.21

  Salicortin

1.67 ± 0.40

2.57 ± 0.47

2.29 ± 0.63

3.67 ± 0.53

7.47 ± 0.86

9.69 ± 0.95

  Salicortin FA adduct

4.76 ± 0.94

6.99 ± 1.07

6.05 ± 1.30

9.04 ± 1.06

16.36 ± 1.49

19.24 ± 1.49

  Grandidentatin 1

0.22 ± 0.02

0.26 ± 0.04

0.29 ± 0.04

0.63 ± 0.26

0.98 ± 0.09

1.50 ± 0.08

  Tremuloidin FA adduct

3.10 ± 0.50

0.95 ± 0.13

2.27 ± 0.51

9.71 ± 0.74

6.96 ± 0.77

7.24 ± 0.62

  Grandidentatin 2

0.22 ± 0.02

0.23 ± 0.03

0.24 ± 0.04

0.39 ± 0.05

0.89 ± 0.14

1.25 ± 0.15

  Tremulacin

8.34 ± 1.39

9.95 ± 1.46

12.01 ± 2.18

21.09 ± 2.10

29.46 ± 2.34

32.95 ± 1.97

Total content of secondary metabolites

45.07 ± 3.76

52.12 ± 4.02

50.88 ± 4.98

63.21 ± 4.80

91.30 ± 5.96

104.75 ± 5.83

  1. UT un-thinned, C corridor thinning, CC cross-corridor thinning