Figure 4.

Relative mRNA accumulation of genes involved in leaf, flower, and fruit development in leaves (A) and flower buds (B) in TPMVd- and MPVd-infected tomato plants. Total leaf RNAs were extracted at 4 w.p.i. Gene expression values are relative to mock-inoculated controls to which a value of 1 was assigned. The EF-1α elongation factor gene was used as an internal reference. Data are the means of three biological replications and error bars indicate two times the value of SD for the corresponding data set. Asterisks indicate statistical significance when analyzed using a paired t-test (p < 0.05). Where both treatments are statistically significant from mock-inoculated controls, one asterisk is placed above the bars.