Rapeseed Germination Research Articles

Nonchemical Approach for Reducing Antinutritional Factors in Rapeseed (Brassica campestrisVar. Toria) and Characterization of Enzyme Phytase

Antinutritional factors, viz. glucosinolates, phenols, and phytic acid, decreased with germination of rapeseed. Protein content declined during the first 24 h after imbibition and thereafter increased. Phytase activity increased with germination with a parallel decrease in phytic acid content. Two phytase fractions were separated during elution on DEAE-cellulose column, showing purifications of 26.75- and 19.96-fold, respectively. Optimum pH and temperature for both fractions were 5.2 and 50 °C, respectively. Enzyme stability decreased considerably after 50 °C, and phytase 2 was stable for a longer time. Mn, Co, Ca, and EDTA promoted the enzyme activity, whereas ions of Zn, Fe, Cu, fluoride, molybdate, and arsenate were inhibitory. Keywords: Antinutritional factors; characterization; germination; phytase

Quality and germination of rapeseed and canola seed damaged by adult cabbage seedpod weevil, Ceutorhynchus assimilis (Paykull) [Coleoptera: Curculionidae

Adult feeding injury by the cabbage seedpod weevil (Ceutorhynchus assimilis Paykull) on pods and seeds of winter rapeseed and canola (Brassica napus L.) in Georgia and Idaho reduced seed weight and oil content an average of 16.2 and 2.2%, respectively. Injury also reduced seed germination by 40.5%, increased me proportion of germinated seed with abnormal growth and reduced seedling emergence from soil. Key words: Insecta, Ceutorhynchus assimilis, canola, rapeseed, Brassica napus, seed injury

(196)菜種子実の成熟および発芽にともなう油脂変化について

(196)菜種子実の成熟および発芽にともなう油脂変化について