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Characteristics of Boron Absorption by Excised Barley Roots
Author(s) -
Bingham F. T.,
Elseewi A.,
Oertli J. J.
Publication year - 1970
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/sssaj1970.03615995003400040022x
Subject(s) - absorption (acoustics) , boric acid , boron , substrate (aquarium) , chemistry , salt (chemistry) , inorganic chemistry , analytical chemistry (journal) , nuclear chemistry , chromatography , materials science , organic chemistry , biology , composite material , ecology
Boron absorption by excised barley roots was found to be noncumulative, rapid, and unaffected by pH variations of the substrate in the acid range. However, increases in pH above 7.0 resulted in sharp reductions in absorption. At pH 6.0, changes in substrate temperature, salt composition and level, or addition of KCN and 2,4‐DNP failed to exert any influence on B absorption. These results indicate that B absorption is a physical, non‐metabolic process acting in response to B concentration gradient and that molecular boric acid is favored for absorption.