LONGITUDINAL GRADIENTS OF P32 ABSORPTION IN ROOTS

Latitudinal, longitudinal and depth gradients

Absorption of sugars into Arabidopsis roots

Background: Transporters to absorb monosaccharides into Arabidopsis roots are poorly understood. Results: stp1 and stp13 mutants are insensitive to exogenous monosaccharides. Monosaccharide uptake by STP1 and STP13 was affected by environmental stresses. Conclusion: Contribution of STP13 to monosaccharide uptake become higher under high salinity conditions in which STP13 is induced. Significanc...

Kinetics of Sulfate Absorption by Barley Roots.

provements in the determination of iron by the Nitroso-R Salt Method. Ind. Eng. Chem., Anal. Ed. 16: 272. 1944. 25. SIDERIS, C. P. and YOUNG, H. Y. Effects of iron on chlorophyllous pigments, ascorbic acid, acidity and carbohydrates of Ananas comosus (L.) Merr. supplied with nitrate or ammonium salts. Plant Physiol. 19: 52-75. 1944. 26. SIDERIS, C. P. and YOUNG, H. Y. Effects of potassium on ch...

Gradients of Absorption Line Strengths in Elliptical Galaxies

We have re-studied line-strength gradients of 80 elliptical galaxies. Typical metallicity gradients of elliptical galaxies are ∆[Fe/H]/∆ log r ' −0.3 which is flatter than the gradients predicted by monolithic collapse simulations. The metallicity gradients do not correlate with any physical properties of galaxies, including central and mean metallicities, central velocity dispersions σ0, absol...

Selenium absorption by excised Astragalus roots.

Absorption of selenate and selenite by excised roots of Astragalus Crotalariae, a selenium accumulator, and of A. lentiginosus, a non-accumulator, was favored by CaCl(2) and a pH of 4.0. The uptake of selenate and possibly selenite, is metabolically linked. Roots of a number of Astragalus species were examined, and in all cases selenate entered the roots much faster than selenite. In these shor...