The objectives of this study are to illustrate the difference of resistant traits to
Bemisia tabaci between resistant and nonresistant tomato accessions and the relationship between resistant traits and resistance to
Bemisia tabaci.
Solanum lycopersicum‘9706’，‘LA3556
’，
S. habrochaites‘LA2329
’，‘LA1777
’，‘PI134417
’，
S. pennellii‘LA0716
’and S. pimpinellifolium‘TO937
’，‘PI126933
’were used in this study. Tomato accessions were bioassayed with whiteflies using an in vitro method. Trichome types on leaf abaxial were observed by environmental scanning electron microscope. The densities of trichome were counted by anatomical lens. The species and qualities of metabolisms on leaf surface were analysis by GC–MS. The data were subjected to ANOVA and correlation analysis by V8. The highest level of resistance was observed in
S. habrochaites‘LA2329
’，‘LA1777
’，‘PI134417
’and S. pennellii ‘LA0176
’. The resistance of S. pimpinellifolium‘TO937
’to whitefly was strengthened followed plant development. S. lycopersicum‘9706’，‘LA3556
’and S. pimpinellifolium‘PI126933
’were nonresistant to whitefly. Type Ⅳ and Ⅵ trichome densities were superior on abaxial leaf surfaces of
S. habrochaites，the densities of them were 8.0–15.4 and 4.7–19.5 per mm
2，respectively. Type Ⅳ trichome densities were superior on abaxial leaf surfaces of
S. pennellii ‘LA0716
’and S. pimpinellifolium‘TO937
’，the densities were 6.7 and 15.4 per mm
2，respectively. Trichomes on abaxial leaf surfaces of nonresistant tomato accessions were mainly non-glandular trichomes，densities were 3.6–10.6 per mm
2. Type Ⅳ and Ⅵ trichomes densities were 0–1.5 and 2.3–4.1 per mm
2 of these tomato accessions. Terpenoids species and qualities of
S. habrochaites were more than others tomato species. Presence of methyl ketones were species specific of‘PI134417
’. Wax qualities were not significant differences between resistant and nonresistant tomato accessions. Density of type Ⅳ trichomes and terpenoid content were significantly negative correlated with number of whitefly eggs laid on abaxial leaf surfaces. Conversely，density of type Ⅴ trichomes was positive correlated with the number of whitefly eggs. Density of type Ⅵ trichomes was positively correlated with terpenoid concentration but not correlated with number of whitefly eggs. Wax content was significantly negative correlated with 8
hours number of whitefly eggs，but not correlated with 24 hours number of whitefly eggs. Trichome types and densities on abaxial leaf surfaceⅣ trichome and terpenoid content resulted in reduce whitefly ovipositionⅤ trichomes which should be abandoned in the process of breeding for whitefly resistance. Type Ⅵ trichome was not resistance to Bemisia tabaci directly. The resistance to Bemisia tabaci of wax content was not long-acting. So type Ⅵ trichomes and wax content were not relatable selection criterions for resistance to Bemisia tabaci. and were reliable selection criterions for resistance to
Bemisia tabaci. Whitefly preferred to oviposition on tomato accessions of high densities of type of the different tomato accessions showed significant inter- and intra-specific differences. Type
