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Gibberellin‐like substances and indole type auxins in developing grains of normal‐ and high‐lysine genotypes of barley
Author(s) -
MOUNLA M. A. KH.,
BANGERTH F.,
STORY V.
Publication year - 1980
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1980.tb03306.x
Subject(s) - auxin , hordeum vulgare , gibberellin , anthesis , cultivar , botany , poaceae , biology , horticulture , chemistry , agronomy , biochemistry , gene
Changes in gibberellin‐like activity and content of indole type auxins were investigated during grain development of the two high‐lysine barley ( Hordeum vulgare L.) genotypes Sv 73608 and Risø 1508, and their corresponding normal cultivars Mona and Bomi. A peak in gibberellin‐like activity was found in developing grains of the normal cultivars about 18 days after anthesis, whereas the grains of the high‐lysine genotypes showed a two to five times higher maximum about 3–4 days later. The auxin content of the cultivar Bomi showed a maximum between the 22nd and the 29th day after anthesis, whereas, throughout their development the grains of the mutant Risø 1508 exhibited only about 1 /10 of the maximum level of auxin found in the grains of Bomi. The normal cultivar Mona also displayed higher contents of auxin than the high‐lysine genotypes Sv 73608, particularly at the later stages of grain growth, but the differences in concentration were considerable smaller than for the pair ‘Bomi’—‘Risø 1508’. It is suggested that auxins play an important role in the development of barley grains.