Compile your own dataset:

Select the keywords you want to take into account, then hit "Fetch Experiments!":
(you can also use regular expressions in the textbox next to a keyword in the tree)

Search keywords:
(search in: ) MGEDOntology
plant environment ontology
plant growth and development stages
plant structure
Union Intersection Also fetch control experiments

Insert a name for your dataset:
Select the experiments you want to use in your dataset and click "Normalize"