Seed film coating with uniconazole improves rape seedling growth in relation to physiological changes under waterlogging stress.

摘要

Waterlogging is an important constraint to the global production of rape (Brassica napus). The effects of seed film coating with 0.0075% uniconazole on the growth and physiology was investigated using seedlings from three rape cultivars (Zheyou758, Shuang72 and Huaza4) subjected to waterlogging. While seed coating with uniconazole had no significant effect on germination percentage during waterlogging stress, it enhanced root vigour, increased root length, root volume and root dry weight. It also significantly enhanced leaf dry weight and ratio of root to shoot, but induced a significant decrease in shoot height and stem dry weight. Seed film coating with uniconazole also significantly increased the activities of the antioxidant enzymes peroxidase, catalase and superoxide dismutase, and soluble sugar concentration during waterlogging. Thus, it suggests that seed film coating with uniconazole at a suitable concentration can improve rape seedling growth and increase seedling establishment during waterlogging..