( ( In ( ( the ( dock ( leaf ( disc ( senescence bioassay ) ) ) ) ) ( for gibberellins ) ) ) ( BR ( ( ( ( promotes senescence ) , ) ( whereas ( gibberellins ( delay senescence ) ) ) ) . ) ) )
(ROOT (S (PP (IN In) (NP (NP (DT the) (NN dock) (NN leaf) (NN disc) (NN senescence) (NN bioassay)) (PP (IN for) (NP (NNS gibberellins))))) (NP (NNP BR)) (VP (VBZ promotes) (ADJP (JJ senescence)) (, ,) (SBAR (IN whereas) (S (NP (NNS gibberellins)) (VP (VB delay) (ADJP (JJ senescence)))))) (. .)))
In the dock leaf disc senescence bioassay for gibberellins BR promotes senescence, whereas gibberellins delay senescence.
(ROOT (S (NP (JJ Young) (NNS roots) (CC and) (NNS leaves)) (VP (VBP are) (NP (NP (DT the) (JJ major) (NNS sites)) (PP (IN of) (NP (NN gibberellin) (NN production))))) (. .)))