中国稻米

中国稻米 ›› 2024, Vol. 30 ›› Issue (3): 67-71.DOI: 10.3969/j.issn.1006-8082.2024.03.011

• 专论与研究 • 上一篇    下一篇

苗期喷施茉莉酸甲酯对香稻品种象牙香占香气的影响

邢丕鹏(), 何珍珍, 张震, 罗昊文, 张莹莹, 邓思呈, 莫钊文, 潘圣刚, 田华, 段美洋, 祁剑英, 唐湘如*()   

  1. 华南农业大学 亚热带农业生物资源保护与利用国家重点实验室/农业农村部华南地区作物栽培科学观测实验站/广州市丝苗香米科学与技术重点实验室，广州510642
  • 收稿日期:2023-10-29 出版日期:2024-05-20 发布日期:2024-05-20
  • 通讯作者: * tangxr@scau.edu.cn
  • 作者简介:

    第一作者：18843184689@163.com

  • 基金资助:
    国家自然科学基金(31971843);广东省现代农业产业技术体系(2020KJ105);广州市科技计划项目(202103000075)

Effects of Spraying Methyl Jasmonate at Seedling Stage on Aroma of Fragrant Rice Xiangyaxiangzhan

XING Pipeng(), HE Zhenzhen, ZHANG Zhen, LUO Haowen, ZHANG Yingying, DENG Sicheng, MO Zhaowen, PAN Shenggang, TIAN Hua, DUAN Meiyang, QI Jianying, TANG Xiangru*()   

  1. State Key Laboratory for Conservation and Utilization of Subtropical Agricultural Bioresources, South China Agricultural University/Scientific Observing and Experimental Station of Crop Cultivation in South China, Ministry of Agriculture and Rural Affairs/Guangzhou Key Laboratory for Science and Technology of Aromatic Rice, Guangzhou 510642, China

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摘要：

茉莉酸甲酯能够提高植物的抗逆境胁迫能力，但在对香稻香气物质2-乙酰基-1-吡咯啉（2-AP）的影响研究还鲜有报道。以香稻品种象牙香占为试验材料，设置茉莉酸甲酯3种喷施浓度（0.25、0.50和1.00 mmol/L），研究苗期喷施对香稻幼苗2-AP合成与累积、香气前体物质含量、香气相关酶活性、香气相关基因表达量调控、抗性酶活性变化和秧苗素质的影响。结果表明，与对照（CK）相比，喷施适当的茉莉酸甲酯浓度（0.50~1.00 mmol/L），香稻幼苗2-AP含量增加，香气合成前体物质1-吡咯啉、丙酮醛和1-吡咯啉-5-羧酸（P5C）含量提高，二胺氧化酶2基因（DAO4）、鸟氨酸转氨酶基因（OAT）和脯氨酸脱氢酶基因（ProDH）表达量提升。茉莉酸甲酯处理还提高了香稻秧苗素质，增加了抗性酶活性，提高了抗氧化能力。适度的茉莉酸甲酯能提高香稻2-AP含量和秧苗素质，归因于相关酶活性和基因表达量的提高。

关键词: 香稻, 2-乙酰基-1-吡咯啉, 茉莉酸甲酯, 秧苗素质

Abstract:

Methyl jasmonate is known to enhance plant stress resistance, however, its specific effects on the accumulation of 2-acetyl-1-pyrroline (2-AP) in fragrant rice have not been extensively investigated. In this experiment, Xiangyaxiangzhan, a fragrant rice variety, was selected as the test material. Three concentrations of methyl jasmonate (0.25, 0.50, and 1.00 mmol/L) were applied during the seedling stage to examine the impact on the synthesis and accumulation of 2-AP, as well as the levels of aroma precursors, activity of aroma-related enzymes, regulation of aroma-related gene expression, changes in enzyme activities related to stress resistance, and seedling quality. The results showed that compared to the control (CK), spraying appropriate concentrations of methyl jasmonate (0.50-1.00 mmol/L) increased expression of DAO4, OAT, and ProDH in fragrant rice seedlings, accompanied by an elevation in 2-AP content. Furthermore, spraying methyl jasmonate increased the levels of aroma synthesis precursors including 1-pyrroline, methylglyoxal, and P5C. This resulted in an improvement in the quality of fragrant rice seedlings, an increase in the activity of stress-resistant enzymes, and enhanced antioxidant capacity.

Key words: fragrant rice, 2-acetyl-1-pyrroline, methyl jasmonate, seedling quality

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