( But ( it ( ( was ( observe ( d ( that ( ( ( ( over 60 ) % ) ( of ( ( the plastids ) ( in ( the ( sperm cells ) ) ) ) ) ) ( ( did not ) ( ( contain ( any DNA ) ) ( based ( on ( DAPI staining ) ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (CC But) (NP (PRP it)) (VP (VBD was) (VP (VBN observe) (SBAR (NP (SYM d)) (IN that) (S (NP (NP (QP (IN over) (CD 60)) (NN %)) (PP (IN of) (NP (NP (DT the) (NNS plastids)) (PP (IN in) (NP (DT the) (NN sperm) (NNS cells)))))) (VP (VBD did) (RB not) (VP (VB contain) (NP (DT any) (NN DNA)) (PP (VBN based) (PP (IN on) (NP (NNP DAPI) (NN staining)))))))))) (. .)))
But it was observe d that over 60% of the plastids in the sperm cells did not contain any DNA based on DAPI staining.
(ROOT (S (PP (IN Like) (NP (NN mitochondria))) (, ,) (NP (NNS plastids)) (VP (VBP contain) (NP (PRP$ their) (JJ own) (NN dna))) (. .)))