Which promoter would most likely give the highest level of transgene expression in both tomato fruit and the pseudostem?

Step-by-step solution

1. Recall that CaMV 35S is a constitutive viral promoter active in many plant tissues, including fruit and vegetative parts.
2. Note that the E8 promoter is fruit‑specific and has minimal activity in pseudostem.
3. Understand that AtUBQ10 and rice actin promoters are also constitutive but generally show lower activity in tomato fruit.
4. Thus, CaMV 35S is the best choice for strong expression in both fruit and pseudostem.

Concept tested: Promoter selection for tissue‑specific expression

Published 10 October 2026 · How this solution was prepared and checked