CAO Zhi,GUO Zhiying,LIN Zhenhua,et al.Effects of SA and GA3 Soaking on Seed Germination and Seedling Growth of Artemisia annua Under Salt Stress[J].Northern Horticulture,2024,(21):76-83.[doi:10.11937/bfyy.20241334]
SA和GA3浸种对盐胁迫下青蒿种子萌发及幼苗生长的影响
- Title:
- Effects of SA and GA3 Soaking on Seed Germination and Seedling Growth of Artemisia annua Under Salt Stress
- 文章编号:
- 1001-0009(2024)21-0076-08
- Keywords:
- salt stress; Artemisia annua; salicylic acid; gibberellin; seed
- 分类号:
- S 567
- 文献标志码:
- A
- 摘要:
- 以青蒿种子和幼苗为试材，对盐胁迫下青蒿种子分别进行不同浓度水杨酸（salicylic acid，SA）和赤霉素（gibberellin，GA3）浸种处理，研究浸种后青蒿种子的萌发指标、幼苗的生长和生理生化指标的变化，以期为提高青蒿耐盐性，缓解盐胁迫对青蒿的伤害提供参考依据。结果表明：150 mmol·L-1盐胁迫显著抑制了青蒿种子萌发和幼苗生长。盐胁迫条件下，随着SA和GA3浸种浓度的增加，青蒿种子的萌发指标、幼苗的生长指标和生理生化指标总体呈先升后降的趋势，以SA浓度为0.3 mmol·L-1和GA3浓度为400 μmol·L-1的浸种缓解盐胁迫效果最佳。综上，在高盐胁迫条件下，适宜浓度的外源SA和GA3浸种处理能显著提高青蒿种子萌发率，提高种子的耐盐性，减轻盐对幼苗生长的抑制作用。
- Abstract:
- Taking Artemisia annua seeds and seedlings as the experimental materials,different concentrations of salicylic acid (SA) and gibberellin (GA3) were used to soak Artemisia annua seeds under salt stress.The changes in germination indicators,seedling growth,and physiological and biochemical indicators of Artemisia annua seeds after soaking were studied,in order to provide reference for improving its salt tolerance and alleviating the damage of salt stress to Artemisia annua.The results showed that with 150 mmol·L-1 NaCl treatments，seed germination and seedling growth of A.annua were all strongly inhibited.Under salt stress，A.annua′s seed germination index，seedling growth index，and physiological and biochemical index increased originally and then dropped as SA and GA3 concentrations increased.With 0.3 mmol·L-1 SA and 400 μmol·L-1 GA3 soaking greatly alleviated the adverse effects of salt stress on A.annua seed.In conclusion，exogenous SA and GA3 soaking treatment with appropriate concentration could significantly increase the germination rate of A.annua seeds，improve the salt tolerance of seeds，and mitigate the inhibition of salt on seedling growth.
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备注/Memo
第一作者简介：曹智（1976-），男，硕士，副教授，现主要从事植物栽培与生理等研究工作。E-mail：464198533@qq.com.基金项目：国家自然科学基金资助项目（82003903）；福建省自然科学基金资助项目（2024J01966）。收稿日期：2024-03-31