Fig. 4.

Type-VI glandular trichome density and total number per leaflet were evaluated in adaxial and abaxial leaf sides of leaflets taken from the third/fourth youngest leaf at 12 d after the initial treatments. Data show the mean (±SEM, n = 6–7) of type-VI leaf glandular trichome densities and total number of trichomes per leaflet in non-infested and thrips-infested wild-type (wt) and def-1 plants (A, B) and mock-treated and MeJA-treated wt and def-1 plants (C, D). Different letters above bars denote significant differences among groups within adaxial or abaxial data compared by Fisher’s LSD test at P ≤ 0.05.