Table 3.

Putative composition and nature of the transcripts present in the generated SSH libraries.

Name of the library	Tester tissue	Driver tissue	Expected biological significance
Po(P)	Pollen	Pistil	Transcripts expressed exclusively in mature pollen grains, not expressed in pistil nor in hydrated, or germinated pollen grains.
P(Po)	Pistil	Pollen	Transcripts expressed exclusively in pistil and hydrated and/or germinated pollen grains but not expressed in mature pollen grains.
P(L)	Pistil	Leaf	Transcripts expressed exclusively in pistils, but not in vegetative tissues (leaf) despite their common evaluative origin.
L(P)	Leaf	Pistil	Transcripts expressed exclusively in vegetative tissues (leaf) and hydrated or germinated pollen grains, but not in pistil.
Po(L)	Pollen	Leaf	Transcripts expressed exclusively in male reproductive tissues (pollen grains), but not in vegetative tissues (leaf).
L(Po)	Leaf	Pollen	Transcripts expressed exclusively in vegetative tissues (leaf), but not in mature pollen grains.