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| 外源MeJA对旱、盐胁迫下酸枣种子萌发的影响 |
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陈佳宁1,2, 梁含云1,2, 杨帆1,2, 任佳丽1,2, 卞田润1,2, 张坚1,2, 李先宽1,2
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1.天津中医药大学, 天津 301617;2.天津中医药大学药用植物国家林木种质资源库, 天津 301617
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| 摘要: |
| 以酸枣种子作为试材，通过种子萌发实验，比较旱盐胁迫下不同浓度茉莉酸甲酯（MeJA）对酸枣种子萌发的影响。结果表明：干旱胁迫（10% PEG6000）、盐胁迫（100 mmol/L NaCl），以及旱盐复合胁迫（6% PEG6000+70 mmol/L NaCl）导致酸枣种子发芽势、发芽率、发芽指数、种子活力以及胚根长均受到抑制，旱盐复合胁迫的毒害作用尤甚；外源MeJA显著提高了各胁迫条件下酸枣种子发芽率，发芽指数、种子活力以及胚根长度，对旱盐复合胁迫下相对害率的降低作用最为显著。表明MeJA可明显缓解旱盐胁迫对酸枣种子萌发造成的不利影响。该实验通过隶属函数法筛选出50 μmol/L的MeJA对各胁迫条件的缓解效果均最为显著，为最佳处理浓度。 |
| 关键词: 酸枣 茉莉酸甲酯 旱盐胁迫 种子萌发 |
| DOI：10.11656/j.issn.1673-9043.2026.08.07 |
| 分类号:Q945.78;S567.19 |
| 基金项目:天津市中医药重点领域科技项目（2026001）；天津市科技计划项目（23ZGCXQY00060）。 |
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| Exogenous MeJA Modulates Seed Germination of Ziziphus jujuba var. spinosa under drought and salt stress conditions |
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CHEN Jianing1,2, LIANG Hanyun1,2, YANG Fan1,2, REN Jiali1,2, BIAN Tianrun1,2, ZHANG Jian1,2, LI Xiankuan1,2
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1.Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China;2.National Forest Germplasm Bank of Medicinal Plants of Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
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| Abstract: |
| [Objective] To investigate the effects of different concentrations of exogenous methyl jasmonate（MeJA） on the germination of Ziziphus jujuba var. spinosa seeds under drought and salt stress conditions. [Methods] Seed germination experiments were conducted to compare the effects of different concentrations of MeJA on seed germination under drought stress（10% PEG6000），salt stress（100 mmol/L NaCl），and combined drought and salt stress（6% PEG6000+70 mmol/L NaCl）. [Results] The results showed that drought stress，salt stress，and combined stress all inhibited the germination potential，germination rate，germination index，seed vigor，and radicle length of Z. jujuba var. spinosa seeds，with the combined stress having the most severe toxic effect. Exogenous MeJA significantly increased the germination rate，germination index，seed vigor，and radicle length under each stress condition，and its effect on reducing the relative harm rate under combined stress was the most significant. This indicates that MeJA can significantly alleviate the adverse effects of drought and salt stress on seed germination. [Conclusion] Through the membership function method，50 μmol/L MeJA was identified as the most effective concentration for alleviating the effects of each stress condition，representing the optimal treatment concentration. |
| Key words: Ziziphus jujuba var. spinosa methyl jasmonate drought and salt stress seed germination |
