test
node1
PO:0009007
portion of plant
tissue
node2
PO:0009013
portion of meristem
tissue
node1->node2
node3
PO:0025433
root anlagen
node2->node3
node4
BFO:0000040
material entity
node5
PO:0025131
plant anatomical
entity
node4->node5
node9
PO:0009011
plant structure
node5->node9
node6
BFO:0000001
entity
node7
BFO:0000002
continuant
node6->node7
node7->node7
node8
BFO:0000004
independent
continuant
node7->node8
node8->node8
node8->node4
node9->node1