Yield, cell structure and physiological and biochemical characteristics of rapeseed under waterlogging stress

作者：Bo Hong, Bingqian Zhou, Dongfang Zhao, Li Liao, Tao Chang, Xuepeng Wu, Junjie Wu, Mingyao Yao, Hu Chen, Jiajun Mao, Chunyun Guan, Mei Guan · 发表于：BMC Plant Biology · 年份：2024 · DOI：10.1186/s12870-024-05599-z · 被引用次数：16 · 研究领域：Plant responses to water stress、Soybean genetics and cultivation、Plant Stress Responses and Tolerance

Rapeseed (Brassica napus L.) is a major oilseed crop in the middle and lower reaches of the Yangtze River in China. However, it is susceptible to waterlogging stress. This study aimed to investigate the physiological characteristics, cellular changes, and gene expression patterns of rapeseed under waterlogging stress, with the goal of providing a foundation for breeding waterlogging-tolerant rapeseed. The results revealed that waterlogging-tolerant rapeseed exhibited higher levels of soluble sugars and antioxidant enzyme activity, particularly in the roots. Conversely, waterlogging-sensitive rapeseed displayed greater changes in malondialdehyde, proline, and hydrogen peroxide levels. Cellular observations showed that after experiencing waterlogging stress, the intercellular space of rapeseed leaf cells expanded, leading to disintegration of mitochondria and chloroplasts. Moreover, the area of the root xylem increased, the number of vessels grew, and there were signs of mitochondrial disintegration and vacuole shrinkage, with more pronounced changes observed in waterlogging-sensitive rapeseed. Furthermore, significant differences were found in the transcription levels of genes related to anaerobic respiration and flavonoid biosynthesis, and different varieties demonstrated varied responses to waterlogging stress. In conclusion, there are differences in the response of different varieties to waterlogging stress at the levels of morphology, physiological characteristics, cell st...