GLR36T807I Mutation of Casuarina equisetifoli Is Associated With a Decreased JA Response to Insect Feeding by Lymantria xylina

文献类型： 外文期刊

第一作者： Chang, Huan

作者： Chang, Huan;Su, Jun;Li, Chengli;Zhu, Tengfei;Cai, Shouping;Chen, Jie;Zhan, Fangfang;Zeng, Liqiong;Ye, Gongfu;Fang, Yu;Li, Jian

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关键词： Casuarina equisetifolia; flavonoids; glutamate receptor-like protein 3.6 (GLR3.6); jasmonic acid; Lymantria xylina; phosphorylation

期刊名称：PLANT CELL AND ENVIRONMENT （ 影响因子：6.3； 五年影响因子：7.7 ）

ISSN： 0140-7791

年卷期： 2025 年 48 卷 5 期

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收录情况： SCI

摘要： Lymantria xylina is the most important defoliator, damaging the effective coastal windbreak tree species Casuarina equisetifolia. However, the underlying genetic mechanisms through which C. equisetifolia responds to L. xylina attacks remain unknown. Here, we compared the transcriptional, phytohormone and metabolic differences between susceptible (S) and resistant (R) C. equisetifolia cultivars in response to L. xylina feeding. The main L. xylina-induced resistance in C. equisetifolia was a jasmonate (JA) response and JA synthesis was highly induced by L. xylina feeding at both the transcriptional and metabolic levels, thus promoting flavonoid accumulation. The JA response was highly activated by L. xylina feeding on the R but not in the S cultivar, although the JA signalling pathway was intact in both cultivars. We found a single amino acid mutation in the homologues of glutamate receptor-like protein 3.6 (CeGLR3.6T807I) in the S cultivar. Compared with the GLR3.6 homologues in the R cultivar, phosphorylation of CeGLR3.6T807I was not induced by insect feeding, leading to a decreased JA response in the S cultivar. Collectively, this study provides new insights into the function of CeGLR3.6 in regulating the JA response of C. equisetifolia to L. xylina feeding.

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