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Table 1 Electrical Penetration Graph (EPG) parameters considered and their relation to Myzus persicae feeding activity on Arabidopsis thaliana Ws and mutant 3790

From: Constitutive overexpression of the pollen specific gene SKS13 in leaves reduces aphid performance on Arabidopsis thaliana

Related tissue

EPG parameter

Wild type (Ws) n1 = 18

Mutant 3790 n = 15

Pvalue2

Epidermal

Time to first probe (min)

2.5 ± 0.7

2 ± 0.4

0.870

Prephloem

Number of probes before first phloem contact

10.5 ± 2.6

13.2 ± 4.6

0.969

 

Time from first probe to first phloem contact (min)

61.6 ± 12.4

113.6 ± 15.5

0.024

Phloem

Total time of phloem salivation (min)

10.8 ± 1.5

8.1 ± 1.6

0.025

 

Number of phloem salivation events

14.3 ± 1.8

10.1 ± 1.8

0.240

 

Average duration of phloem salivation (min)

0.8 ± 0.1

0.7 ± 0.1

0.462

 

Total time of phloem ingestion (min)

97.5 ± 10.4

33.3 ± 8.2

0.001

 

Number of phloem ingestion events

13.3 ± 1.6

8.7 ± 1.7

0.110

 

Average duration of phloem ingestion (min)

7.8 ± 0.8

4.3 ± 1.0

0.003

 

Total time of sustained (>10 min) phloem ingestion

64.2 ± 9.4

20.4 ± 2.5

0.002

 

Number of sustained (>10 min) phloem ingestion

3.9 ± 0.6

1.2 ± 0.3

0.001

 

Average duration of sustained (>10 min) phloem ingestion

17.4 ± 2.5

12.7 ± 1.7

0.032

All tissues

Total time of non-probing (min)

106.4 ± 16.9

148.3 ± 11.3

0.023

 

Total time of pathway phase (min)

247.5 ± 11.5

261.4 ± 13.3

0.278

 

Number of aphids with sustained (>10 min) phloem ingestion

18.0 (100%)

11.0 (73%)

0.030

Xylem

Total time of G

15.2 ± 5.8

16.2 ± 4.7

0.912

 

Number of G

0.7 ± 0.3

0.3 ± 0.2

0.195

  1. Values are means ± SE of EPG parameters during 8 h monitoring. 1EPG replicates; 2Mann Whitney U (duration) or Fisher exact (number) test P values.