test
node1
TO:0000164
plant stress trait
node2
TO:0000168
abiotic plant stress
trait
node1->node2
node3
TO:0000237
water stress trait
node2->node3
node4
TO:0000394
drought related trait
node3->node4
node6
TO:0000276
drought tolerance
node4->node6
node5
TO:0000387
plant trait
node5->node1