Two maize genotypes differently responsive to nitrogen availability were characterized for their ef®ciency in nitrate accumulation via both the LATS (LowAf®nity Transport System) and HATS (High-Af®nity Transport System) nitrate uptake systems. In addition, a full-length cDNA encoding a putative highaf®nity nitrate transporter (ZmNrt2.1) was isolated and its expression evaluated in both the root...

In papers by Wang et al. (1998), Liu et al. (1999), and Liu and Tsay (2003), it was proposed that Arabidopsis thaliana Nitrate Transporter1.1 (AtNRT1.1; CHL1) encodes a dual-affinity nitrate transporter that “plays a major role in high-affinity nitrate uptake.” Here, we evaluate this concept by reexamining the uptake kinetics of Arabidopsis (Arabidopsis thaliana) mutant lines defective in NRT1....

In papers by Wang et al. (1998), Liu et al. (1999), and Liu and Tsay (2003), it was proposed that Arabidopsis thaliana Nitrate Transporter1.1 (AtNRT1.1; CHL1) encodes a dual-affinity nitrate transporter that “plays a major role in high-affinity nitrate uptake.” Here, we evaluate this concept by reexamining the uptake kinetics of Arabidopsis (Arabidopsis thaliana) mutant lines defective in NRT1....

We present details of a large, novel dataset that includes both Carnegie Learning Cognitive Tutor interaction data and various data related to learner interactions with human tutors via an online chat while using the Cognitive Tutor. We discuss integrating these two data modalities within LearnSphere and propose workflows (and corresponding analyses) germane to our U.S. Department of Defense Ad...

to investigate the impact of overexpression of atnrt2.1 transgene from arabidopsis on nitrate uptake rate and to understand the regulation of endogenous hats by nitrate and glutamine amino acid (gln) in tobacco plants, wild-type and transgenic (f line) plants grown on soil for 4 weeks were transferred to hydroponic culture in a controlled-environment with a 16/8h l:d photoperiod at 24? c/20...

To investigate the impact of overexpression of AtNRT2.1 transgene from Arabidopsis on nitrate uptake rate and to understand the regulation of endogenous HATS by nitrate and glutamine amino acid (Gln) in tobacco plants, wild-type and transgenic (F line) plants grown on soil for 4 weeks were transferred to hydroponic culture in a controlled-environment with a 16/8h L:D photoperiod at 24? C/20...