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| 水胁迫对甘薯SOD、POD酶活性和MDA含量及产量的影响 |
| Effects of Water Stress on SOD Enzyme Activity, POD Enzyme Activity, MDA Content, and Yield of Sweet Potato |
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| DOI： |
| 中文关键词: 甘薯 水胁迫 SOD POD MDA 产量 |
| 英文关键词:Sweet Potato Water Stress SOD POD MDA Yield |
| 基金项目:国家甘薯产业技术体系（CARS-10）；重庆市教育委员会科学技术研究项目“甘薯耐湿优质种质资源筛选与创新”（KJ202301292353641）。 |
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| 中文摘要: |
| 为探究甘薯在长期水胁迫环境下的适应性，以烟薯25、宁紫薯1号及商薯19三个甘薯品种为试验材料，设置了贯穿甘薯全生长期的水胁迫环境，测定其在长期水胁迫条件下薯块SOD酶活性、POD酶活性、MDA含量及鲜薯产量等指标变化。结果表明甘薯在受到水胁迫之后块根内MDA含量显著提升，SOD、POD酶活性随着MDA含量增加同时增强以进行体内活性氧的自我清除。在增湿环境下烟薯25鲜薯产量减少27.29%、宁紫薯1号减少74.48%，商薯19减少64.37%，减产均为极显著。烟薯25 SOD酶活性、POD酶活性增长幅度及MDA含量变化趋势最小，且鲜薯减产幅度最小，可初步认定耐湿性强；宁紫薯1号及商薯19耐湿性弱，不适宜在易积水地区种植。 |
| 英文摘要: |
| To investigate the adaptability of sweet potato under long-term water stress conditions, three sweet potato varieties—'Yanshu 25', 'Ningzishu 1', and 'Shangshu 19'，were selected as experimental materials. A water stress environment was maintained throughout the entire growth period, and changes in superoxide dismutase (SOD) activity, peroxidase (POD) activity, malondialdehyde (MDA) content, and root yield were measured. The results showed that water stress significantly increased MDA content in sweet potato roots, while SOD and POD activities also increased simultaneously, which helped to scavenge reactive oxygen species (ROS). Under water stress, root yield decreased significantly: 'Yanshu 25' by 27.29%, 'Ningzishu 1' by 74.48%, and 'Shangshu 19' by 64.37%. Among the three varieties, 'Yanshu 25' had the smallest changes in SOD and POD activity and MDA content, as well as the lowest yield reduction, indicating strong water stress tolerance. In contrast, 'Ningzishu 1' and 'Shangshu 19' showed weak tolerance to water stress and were not suitable for cultivation in waterlogged areas. |
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