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Barley ( Hordeum vulgare ) seed dormancy as related to glumella characteristics
Author(s) -
Lenoir C.,
Corbineau F.,
Côme D.
Publication year - 1986
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.1399-3054.1986.tb01930.x
Subject(s) - caryopsis , hordeum vulgare , dormancy , polyphenol oxidase , germination , hordeum , seed dormancy , biology , botany , polyphenol , horticulture , poaceae , chemistry , enzyme , biochemistry , peroxidase , antioxidant
Dormancy of freshly harvested barley ( Hordeum vulgare L. cv. Sonja) caryopses results mainly from glumellae which fix oxygen by polyphenol oxidase (EC 1.14.18.1)‐mediated oxidation of phenolic compounds present in high amounts. The breaking of dormancy during dry storage is not due to qualitative or quantitative modifications of the phenols or polyphenol oxidases. Glumellae of dormant caryopses start to take up oxygen at the beginning of inbibition, whereas those of non‐dormant caryopses start to take up oxygen only after about 10 h. That delay should allow germination.