Fig. 2.

Insect survival plotted against glandular-trichome densities on leaves of selected accessions. a Photographs of S. habrochaites LYC4, S. lycopersicum cv. Moneymaker (MM), S. pennellii LA0716 and S. chmielewskii LA2695 to visualise the diversity in trichome-types. Images of all accessions can be found in Additional file: Figure S2.b Mean glandular trichome density per mm² leaf surface of type I/IV trichomes (top panel) and type VI trichomes (lower panel) against relative whitefly survival rates on the different accessions and c against thrips (F. occidentalis) relative survival. The black regression lines show the linear relationship, with the 95% confidence interval in light grey, between the trichome densities and the survival phenotypes. The r² is given together with asterisks for the significance of the relationships with p-values < 0.05*, < 0.01**, < 0.001***, ns: non-significant. Leaf material analysed originated from the fourth fully expanded leaf from the top of six-week-old plants