Growth inhibitors in oat grains. I. Leakage of inhibiting factors from oat grains during imbibition and the effect of these on germination and growth |
| |
Authors: | Maj-Lis Häggquist Agneta Pettersson Conny Liljenberg |
| |
Institution: | Crop Science Dept., Univ. of Guelph, Guelph, Ontario, Canada;Agricultural Research Dept., Riso National Lab., DK-4000 Roskilde, Denmark. |
| |
Abstract: | Spikes of barley ( Hordeum vulgare L.) cultivar Bomi and high-lysine mutants Riso 1508 and Riso 56 were cultured on liquid media at varying N and sucrose levels. Bomi accumulated N in response to increasing N levels in the medium and a higher level was reached than in spikes of intact plants. The distribution of N in salt-soluble, hordein, and non-protein N fractions appeared to be normal. Endosperm dry weight and starch were lower than in intact plants and declined at higher N levels. A linear relationship was observed between starch content and the concentration of sucrose in the endosperm water. Uptake of culture medium by the spikes was affected by both N and sucrose concentration. The mutants had lower dry weights and starch contents, and higher sucrose contents than Bomi. At high N levels, the mutants accumulated less hordein, and more non-protein N than Bomi. |
| |
Keywords: | Hordein Hordeum vulgare starch |
|
|