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- W1936948743 abstract "Understanding how root system architecture (RSA) adapts to changing nitrogen and water availability is important for improving acquisition. A sand rhizotron system was developed to study RSA in a porous substrate under tightly regulated nutrient supply. The RSA of Arabidopsis seedlings under differing nitrate (NO3-) and water supplies in agar and sand was described. The hydraulic conductivity of the root environment was manipulated by using altered sand particle size and matric potentials. Ion-selective microelectrodes were used to quantify NO3- at the surface of growing primary roots in sands of different particle sizes. Differences in RSA were observed between seedlings grown on agar and sand, and the influence of NO3- (0.1–10.0 mm) and water on RSA was determined. Primary root length (PRL) was a function of water flux and independent of NO3-. The percentage of roots with laterals correlated with water flux, whereas NO3- supply was important for basal root (BR) growth. In agar and sand, the NO3- activities at the root surface were higher than those supplied in the nutrient solution. The sand rhizotron system is a useful tool for the study of RSA, providing a porous growth environment that can be used to simulate the effects of hydraulic conductivity on growth." @default.
- W1936948743 created "2016-06-24" @default.
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- W1936948743 date "2011-06-28" @default.
- W1936948743 modified "2023-09-27" @default.
- W1936948743 title "Water supply and not nitrate concentration determines primary root growth in Arabidopsis" @default.
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- W1936948743 doi "https://doi.org/10.1111/j.1365-3040.2011.02358.x" @default.
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