( ( From ( ( ( ( the measurements ) ( of ( transcript levels ) ) ) and ) ( ( carbohydrate contents ) ( in ( mature ( leaf blades ) ) ) ) ) ) ( , ( we ( ( propose ( that ( ( ( the expression ) ( of ( ( the gene ) ( for ( the ( maize ( sucrose transporter ) ) ) ) ) ) ) ( ( is positively ) ( regulated ( by ( ( the amounts ) ( of ( ( soluble sugars ) ( such ( as ( ( ( sucrose and ) glucose ) ( in ( ( source leaves ) ( of maize ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN From) (NP (NP (NP (DT the) (NNS measurements)) (PP (IN of) (NP (NN transcript) (NNS levels)))) (CC and) (NP (NP (JJ carbohydrate) (NNS contents)) (PP (IN in) (NP (JJ mature) (NN leaf) (NNS blades)))))) (, ,) (NP (PRP we)) (VP (VBP propose) (SBAR (IN that) (S (NP (NP (DT the) (NN expression)) (PP (IN of) (NP (NP (DT the) (NN gene)) (PP (IN for) (NP (DT the) (JJ maize) (NN sucrose) (NN transporter)))))) (VP (VBZ is) (ADVP (RB positively)) (VP (VBN regulated) (PP (IN by) (NP (NP (DT the) (NNS amounts)) (PP (IN of) (NP (NP (JJ soluble) (NNS sugars)) (PP (JJ such) (IN as) (NP (NP (NN sucrose) (CC and) (NN glucose)) (PP (IN in) (NP (NP (NN source) (NNS leaves)) (PP (IN of) (NP (NN maize)))))))))))))))) (. .)))
From the measurements of transcript levels and carbohydrate contents in mature leaf blades, we propose that the expression of the gene for the maize sucrose transporter is positively regulated by the amounts of soluble sugars such as sucrose and glucose in source leaves of maize.
(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))))))))) (. .)))