( Sucrose ( ( is ( formed ( ( ( by ( ( plants and ) cyanobacteria ) ) ( but not ) ) ( by ( other organisms ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Sucrose)) (VP (VBZ is) (VP (VBN formed) (PP (PP (IN by) (NP (NNS plants) (CC and) (NN cyanobacteria))) (CONJP (CC but) (RB not)) (PP (IN by) (NP (JJ other) (NNS organisms)))))) (. .)))
Sucrose is formed by plants and cyanobacteria but not by other organisms.
(ROOT (S (NP (NNS Plants)) (ADVP (RB generally)) (VP (VB transport) (NP (NNS carbohydrates)) (PP (IN from) (NP (NP (NP (NNS leaves)) (PP (TO to) (NP (NNS roots)))) (CC and) (NP (NP (JJ other) (JJ nonphotosynthetic) (NNS organs)) (PP (IN in) (NP (NP (DT the) (NN form)) (PP (IN of) (NP (NN sucrose))))))))) (. .)))