Thanks for the background on plant biology/chemistry Dice. As I gather it, the xylem is one of two types of transport tissues in the tomato, and it only transports water and minerals (root->up). The phloem transports minerals and nutrients (mainly sugars) directly to where the plan can use it, so bidirectional. Presumably, both transports would benefit my lone truss fruits.
-naysen
Yes, I now know the absolute minimum on the topic thanks to wiki.
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