Effects of Spraying Methyl Jasmonate at Seedling Stage on Aroma of Fragrant Rice Xiangyaxiangzhan
1st author: 18843184689@163.com
Received date: 2023-10-29
Online published: 2024-05-20
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
XING Pipeng, HE Zhenzhen, ZHANG Zhen, LUO Haowen, ZHANG Yingying, DENG Sicheng, MO Zhaowen, PAN Shenggang, TIAN Hua, DUAN Meiyang, QI Jianying, TANG Xiangru . Effects of Spraying Methyl Jasmonate at Seedling Stage on Aroma of Fragrant Rice Xiangyaxiangzhan[J]. China Rice, 2024 , 30(3) : 67 -71 . DOI: 10.3969/j.issn.1006-8082.2024.03.011
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