Premium
Effect of Low Concentrations of Aluminum on Growth and Water and Nutrient Uptake by Cotton Roots
Author(s) -
Lance J. C.,
Pearson R. W.
Publication year - 1969
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1969.03615995003300010026x
Subject(s) - chemistry , nutrient , zoology , malvaceae , horticulture , botany , biology , organic chemistry
Using a split root technique, the roots of 8‐day‐old cotton seedlings ( Gossypium hirsutum ‘Empire’) were exposed to concentrations of 0, 0.15, 0.225, and 0.30 ppm Al for periods varying from ⅓ to 12 hours. Reductions in root weight and Ca uptake were the only effects observed after roots were exposed to 0.30 ppm Al for 1 hour. After longer exposures the uptake of water, Ca, Mg, K, P, and NO 3 from ¼ Hoagland's solution was reduced. The curve of relative uptake vs. Al concentration was about the same in each case. The inhibition of Ca uptake was avoided by increasing the Ca concentration to 15 m M . Increasing the osmotic pressure did not accentuate the effect of Al on water uptake. The inhibition of all types of uptake indicates that the permeability of the plasmalemma is reduced. This might be due to interference in a function of Ca.