Transcriptomic Analysis of Sunflower (Helianthus annuus) Roots Resistance to Orobanche cumana at the Seedling Stage

文献类型： 外文期刊

第一作者： Huang, Qixiu

作者： Huang, Qixiu;Lei, Zhonghua;Xiang, Lijun;Zhang, Li;Gao, Yan;Lei, Zhonghua;Zhang, Wangfeng

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关键词： transcriptomic analysis; sunflower; Orobanche cumana; plant-pathogen interaction; resistance

期刊名称：HORTICULTURAE （ 影响因子：3.0； 五年影响因子：3.2 ）

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年卷期： 2022 年 8 卷 8 期

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收录情况： SCI

摘要： Orobanche cumana is a root alloparasitic plant that drastically reduces sunflower (Helianthus annuus) production. In this study, transcriptomic changes of O. cumana-resistant (HZ2399) and O. cumana-sensitive (SQ25) sunflower seedlings were investigated at six time points (0-72 h) following O. cumana infection. The process of resistance to O. cumana was similar in HZ2399 and SQ25 seedlings, however, significantly higher regulatory activity was observed in the resistant plants. In HZ2399, most of the 54 upregulated genes were involved in phenylpropanoid biosynthesis, plant-pathogen interaction, and plant hormone signal transduction pathways. These genes were mainly associated with antioxidant responses, responses to stress, stimulation responses, and metabolic processes. The expression level of the three most significantly upregulated genes in HZ2399 (4CL2, EDS1, and TGA3) was significantly higher than that of SQ25, suggesting that they may be the main causes of O. cumana immunity in HZ2399. It is hypothesized that sunflower resistance to O. cumana parasitism is dependent on salicylic acid (SA), a disease resistance protein (TIR-NBS-LRR class) family (RPS4), and EDS1. The results of this study contribute to elucidating the mechanism of O. cumana resistance in sunflower and for the molecular breeding of O. cumana resistance.

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