Research Progress on the Effect of Nitrogen on Rapeseed between Seed Yield and Oil Content and Its Regulation Mechanism

Rapeseed (Brassica napus L.) is one of the most important oil crops in China. Improving production rapeseed an way to ensure safety edible Oil index that reflects quality and determined by content yield. Applying nitrogen a strong stable However, seed has been shown be reduced varieties after application. Thus, it critical screen elite germplasm resources with or improved under high levels nitrogen, investigate molecular mechanisms regulation accumulation. few studies on these aspects have published. In this review, we analyze effect growth development rapeseed, including photosynthetic assimilation, substance distribution, synthesis lipids proteins. process, expression genes related absorption, transport changed application, which enhanced ability carbon assimilation increased biomass, thus leading higher After crop enters reproductive phase, photosynthates body are transported developing for protein lipid synthesis. precedes synthesis, large number consumed during weakens Moreover, suggest several research directions, especially exploring involved accumulation regulation. study, summarize effects at both physiological levels, aiming reveal and, thereby, provide theoretical basis breeding content.