In my scientific article manuscript, I used tomato to refer to the plant in general. But after I sent the manuscript to the Elsevier English Correction Service, they changed all tomato into tomatoes. For example this sentence:
This suggests that an interaction among many genes is associated with the mechanism in tomatoes.
I am quite conflicted about this. I only want to refer to the tomato plant in general, not to emphasize different types of tomatoes. What is the correct choice in this case? When should I use tomato and when tomatoes?