Plant organ and Reproductive structure

Plant organ noun - A functional and structural unit of a plant or fungus.

Reproductive structure and plant organ are semantically related. In some cases you can replace phrase "Reproductive structure" with "Plant organ", this phrases are similar.

Reproductive structure noun - The parts of a plant involved in its reproduction.

Plant organ and reproductive structure are semantically related. You can use "Plant organ" instead a noun phrase "Reproductive structure".