| NaCl胁迫对长江2号多花黑麦草种子发芽及幼苗生长的影响 |
| |
| 引用本文： | 伍德,孙帅,刘金平,谢瑞娟.NaCl胁迫对长江2号多花黑麦草种子发芽及幼苗生长的影响[J].草原与草坪,2017(5):59-63. |
| |
| 作者姓名： | 伍德 孙帅 刘金平 谢瑞娟 |
| |
| 作者单位： | 西华师范大学 生命科学学院,四川 南充,637009 |
| |
| 基金项目： | 四川省科技支撑计划项目，科技部科技支撑 |
| |
| 摘 要： | 以长江2号多花黑麦草种子为材料,设置5个NaCl浓度梯度(0.1%,0.2%,0.3%,0.4%,0.5%),通过测定发芽率、发芽势、幼苗生长速度及幼苗的SOD活性、MDA含量,分析盐胁迫对长江2号多花黑麦草种子发育及幼苗生长的影响。结果表明:种子的发芽率和发芽势,幼苗的株高和生长速度均受NaCl浓度影响。浓度大于0.1%时显著降低了种子发芽势,盐浓度大于0.2%时显著降低了种子发芽率。含盐量≤0.3%时显著降低了幼苗的相对生长速率。盐胁迫对幼苗鲜重和干重有显著影响,对幼苗含水量影响较小。0.1%NaCl处理下幼苗叶中SOD活性和CK差异显著(P0.05),NaCl浓度大于0.2%时,叶中SOD活性和MDA含量逐步上升,0.5%NaCl胁迫下幼苗全部死亡。长江2号多花黑麦草的耐盐性较差,适宜在含盐量小于0.1%的土壤上种植和推广。
|
| 关 键 词： | 多花黑麦草 盐胁迫 发芽率 超氧化物歧化酶 丙二醛 |
Influences of NaCl stress on germination and seedling growth of italian ryegrass |
| |
| Abstract: | Germination rate,germination energy,seedling growth speed,SOD activity and MDA content of seedlings were studied under different NaCl concentrations (0.0%,0.1%,0.2%,0.3%,0.4% and 0.5%) with italian ryegrass(No.2 Changjiang)an indicator crop.The results showed that germination rate,germination en-ergy,height and growth speed of seedlings could be affected by NaCl concentrations.Germination rate signifi-cantly decreased as the NaCl concentration above 0.2% and germination energy significantly decreased as the NaCl concentration above 0.1%.The relative growth rate of seedlings significantly decreased as the NaCl con-centration above 0.3%.Effects of NaCl concentrations on fresh weight and dry weight of seedlings were signifi-cant,but that on water content of seedlings was not significant.SOD activity and MDA content under NaCl con-centration of 0.1% were significantly lower than those under the control (0.0%).SOD activity and MDA con-tent significantly increased as the NaCl concentration above 0.2%.Large amount of seedlings died under NaCl concentration of 0.5%.Italian ryegrass has a low salt tolerance,and was only suitable for production under NaCl concentration below 0.1%. |
| |
| Keywords: | italian ryegrass salt stress germination rate SOD MDA |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
