منابع مشابه
Uptake of rb and k by excised maize roots.
Radioactive isotopes are valuable tools for investigating the uptake and transport of ions by biological material. Their use as tracers provide results that often can be obtained only by such a technique. The reliability of isotopes as tracers, however, is sometimes implicitly accepted. Although the pitfalls are widely known, they are often ignored. The hazards were emphasized for us in the use...
متن کاملCadmium-induced sulfate uptake in maize roots.
The effect of cadmium (Cd) on high-affinity sulfate transport of maize (Zea mays) roots was studied and related to the changes in the levels of sulfate and nonprotein thiols during Cd-induced phytochelatin (PC) biosynthesis. Ten micromolar CdCl(2) in the nutrient solution induced a 100% increase in sulfate uptake by roots. This was not observed either for potassium or phosphate uptake, suggesti...
متن کاملHeavy metal stress and sulfate uptake in maize roots.
ZmST1;1, a putative high-affinity sulfate transporter gene expressed in maize (Zea mays) roots, was functionally characterized and its expression patterns were analyzed in roots of plants exposed to different heavy metals (Cd, Zn, and Cu) interfering with thiol metabolism. The ZmST1;1 cDNA was expressed in the yeast (Saccharomyces cerevisiae) sulfate transporter mutant CP154-7A. Kinetic analysi...
متن کاملMechanism of high-affinity potassium uptake in roots of Arabidopsis thaliana.
Potassium is a major nutrient in higher plants, where it plays a role in turgor regulation, charge balance, leaf movement, and protein synthesis. Terrestrial plants are able to sustain growth at micromolar external K+ concentrations, at which K+ uptake across the plasma membrane of root cells must be energized despite the presence of a highly negative membrane potential. However, the mechanism ...
متن کاملHigh-throughput phenotyping technology for maize roots
* Corresponding author. E-mail address: [email protected] (T.E. Gr 1537-5110/$ e see front matter a 2011 IAgrE doi:10.1016/j.biosystemseng.2011.06.004 This paper describes the development of high-throughput measurement techniques allowing acquisition of phenotypical data describing maize roots. One of a maize root’s traits is the level of complexity, which was expressed in a Fractal Dimension ...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1989
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.91.3.1202