Table 1 Relative quantities of volatile compounds collected in the headspace of shoots, unmatured and matured fruits of peach.

From: Peach volatile emission and attractiveness of different host plant volatiles blends to Cydia molesta in adjacent peach and pear orchards

Compounds

SOa

Nectarine shoot

Nectarine fruit

Wild peach fruit

DSb

ISc

DFUd (unmatured)

DFe (matured)

IFUf (unmatured)

IFg (matured)

DFU (unmatured)

DF (matured)

Hydrocarbons

Decane*

SA

      

< 1

 

Tridecane*

SA

       

< 1

Tetradecane*

SA

  

< 1

12

< 1

14

< 1

< 1

Pentadecane*

SA

1

  

24

 

20

100

72

Hexadecane*

SA

2

3

< 1

29

< 1

30

45

96

Heptadecane*

F

2

  

14

 

14

  

Octadecane*

SA

< 1

       

Nonadecane*

SA

< 1

 

< 1

 

< 1

 

35

63

Alcohols

(Z)-3-hexen-1-ol*

SA

5

       

(E)-2-nonen-1-ol

    

< 1

    

2-Methyl-1-hexadecanol

       

< 1

< 1

Aldehydes

Octanal*

F

  

< 1

 

< 1

 

< 1

 

Nonanal*

F

< 1

14

< 1

22

< 1

26

< 1

< 1

Decanal*

F

 

11

< 1

 

< 1

 

< 1

 

Esters

2-Methylpropyl acetate*

SA

   

78

 

80

  

Butyl acetate*

AO

   

8

 

8

  

3-Methyl-1-butyl acetate*

SA

   

41

 

42

  

Ethyl hexanoate*

TC

      

< 1

 

Hexyl acetate*

F

   

23

 

20

< 1

 

(Z)-3-hexenyl acetate*

SA

100

100

< 1

100

< 1

100

< 1

100

Methyl octanoate*

SA

   

< 1

    

Butyl hexanoate

SA

 

8

      

Hexyl butanoate

TC

 

10

      

Hexyl 2-methylbutyrate

  

30

      

Hexyl hexanoate

  

7

      

Benzenoids

Benzaldehyde*

SA

15

       

Methyl salicylate*

SA

< 1

       

Ketones

6-Methyl-5-hepten-2-one *

SA

 

< 1

< 1

 

< 1

 

< 1

< 1

Terpenoids

Limonene*

F

  

< 1

 

< 1

 

< 1

 

(E)-β-ocimene*

SA

87

86

      

Linalool*

F

< 1

 

100

42

100

45

26

< 1

(E, E)-α-farnesene*

SA

 

23

< 1

3

< 1

2

  

(E)-β-caryophyllene*

F

 

< 1

      
  1. The asterisked compounds had been conclusively identified by comparison of spectra and retention times with those of an authentic standard. Compounds in bold face type elicited antennal responses in Gas chromatography-Electroantennogram detection (GC-EAD) experiments. Compounds within each class were listed according to retention times on a polar DB-Wax fused silica column. The varieties of peach species were nectarine peach of Prunus persica (L.) Batsch cv. Shuguang and wild peach from Prunus persica (L.) Batsch cv. Shenzhoubaimi. Quantities are expressed relative to the most abundant compound (set to a value of 100) in the shoots and two stages of peach fruits. The average amount ± SD of the most abundant compound collected from 100 g of plant issues (N = 5) in the different phenological stages was: Nectarine shoot) 78.79 ± 7.85 ng/h of (Z)-3-hexenyl acetate in detached shoots (DS); 104.13 ± 18.15 ng/hr of (Z)-3-hexenyl acetate in intact shoots (IS); Nectarine fruit) 6.01 ± 2.97 ng/h of linalool in unmatured detached fruits (DFU); 58.75 ± 7.91 ng/h of (Z)-3-hexenyl acetate in matured detached fruits (DF); 7.67 ± 3.21 ng/h of linalool in unmatured intact fruits (IFU); 63.33 ± 9.45 ng/h of (Z)-3-hexenyl acetate in matured intact fruits (IF); wild peach) 16.39 ± 2.26 ng/h ng/h of pentadecane in unmatured detached fruits (DFU); 29.19 ± 5.63 ng/h (Z)-3-hexenyl acetate in matured detached fruits (DF).
  2. aSO source of authentic standards. The standards were obtained from Sigma-Aldrich Co., St. Louis, MO, USA (SA), Fluka Production GmbH, Buchs, Switzerland (F), Acros Organics, New Jersey, USA (AO), Tokyo Chemical Industry CO., Tokyo, Japan (TC).
  3. b DS and cIS denote detached and intact peach shoots respectively.
  4. dDFU and eDF denote unmatured and matured detached peach fruit respectively.
  5. fIFU and gIF denote unmatured and matured intact peach fruit respectively.
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