Molecular cloning and expression analysis of cDNAs encoding a putative Nrt2 nitrate transporter from peach.

Two cDNA clones encoding a putative high-affinity nitrate transporter (Nrt2) were isolated from a cDNA library of peach (Prunus persica (L.) Batsch) roots. The nucleotide sequences of the clones, named PpNrt2.

Influence of different cultivars on populations of ammonia-oxidizing bacteria in the root environment of rice.

Comparisons of the activities and diversities of ammonia-oxidizing bacteria (AOB) in the root environment of different cultivars of rice (Oryza sativa L.) indicated marked differences despite identical environmental conditions during growth. Gross nitrification rates obtained by the 15N dilution technique were significantly higher in a modern variety, IR63087-1-17, than in two traditional varieties.