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TRANSPORT OF [ 14 C] GIBBERELLIC ACID IN THE BARLEY EMBRYO
Author(s) -
Palmer G. H.
Publication year - 1972
Publication title -
journal of the institute of brewing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.523
H-Index - 51
eISSN - 2050-0416
pISSN - 0046-9750
DOI - 10.1002/j.2050-0416.1972.tb03483.x
Subject(s) - scutellum , gibberellic acid , aleurone , germination , caryopsis , embryo , biology , botany , hordeum vulgare , chemistry , biochemistry , endosperm , poaceae , microbiology and biotechnology
Radioactive gibberellic acid has been used to obtain direct evidence that, during germination of barley, transport occurs along vascular strands of the scutellum towards the dorsal (non‐furrowed) surface of the grain. Preferential stimulation of the dorsally‐placed aleurone cells therefore accounts for the normal asymmetric pattern of enzymic modification that occurs during malting. In the scutellum, gibberellic acid is transported at a rate of about 2.5 mm per hour. It is suggested that rapid development of the vascular system in the scutellum may be an important feature of barleys that malt rapidly.