ABSORPTION OF WATER BY DEAD ROOTS

Absorption of Water through Suberized Roots of Trees.

It is generally assumed that absorption of water anid solutes by plant roots occurs principally in the unsuberized region back of the root cap where root hairs are usually produced. It seems probable, however, that under somne conditions considerable absorption must occur through the suberized regions of roots, especially those of woody plants. For example, root elongation of most trees and shr...

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...

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...

Manganese absorption by excised barley roots.

Short-term absorption studies with 5-day-old excised barley roots revealed that the basic aspects of Mn absorption were similar to those of other metabolically absorbed cations. Following an initial non-metabolic equilibration with the root, Mn was absorbed for several hours at a slower steady-state rate comparable to that of other inorganic cations. Complete or nearly complete inhibition of th...

Water Absorption of Elastomers By