Legrifi Ikram, Radi Mohammed, Taoussi Mohammed, Khadiri Mohammed, Hari Amal, Sagouti Tourya, Figuigui Jamila Al, Belabess Zineb, Lazraq Abderrahim, Lahlali Rachid
Phytopathology Unit, Department of Plant Protection, Ecole Nationale d'Agriculture de Meknès, Km 10, Rte Haj Kaddour, BP S/40, Meknes 50001, Morocco.
Laboratory of Functional Ecology and Environmental Engineering, Sidi Mohamed Ben Abdellah University, Route d'Imouzzer, P.O. Box 2202, Fez 30000, Morocco.
Pathogens. 2025 Aug 11;14(8):803. doi: 10.3390/pathogens14080803.
, a soilborne pathogen responsible for root rot in olive trees, poses a significant threat to olive production. Managing this pathogen remains challenging due to its aggressive root colonization and the limited efficacy of conventional control methods. Given the concerns associated with chemical treatments, this study evaluated the resistance of eight olive varieties to -induced root rot under controlled greenhouse conditions by assessing structural and biochemical defense mechanisms. Greenhouse trials revealed that Arbequina, Koroneiki, and Haouziya exhibited strong resistance, with 0% disease severity, while Picholine Marocaine and Picholine Languedoc were highly susceptible, reaching 100% disease severity. Growth parameters varied significantly, with susceptible varieties showing severe reductions in root length (RL), root fresh weight (RFW), and root dry weight (RDW), whereas resistant varieties maintained these parameters unchanged. While shoot length (SL) remained unaffected across all varieties, shoot fresh weight (SFW) and shoot dry weight (SDW) were significantly reduced in susceptible ones. Fourier-transform infrared (FTIR) spectroscopy revealed that resistant varieties maintained stable levels of lignin, cellulose, and polysaccharides, while susceptible ones exhibited extensive cell wall degradation. Additionally, total polyphenol content (TPC) and total flavonoid content (TFC) significantly increased in resistant varieties upon infection, whereas susceptible varieties experienced a substantial decline. These findings highlight the crucial role of structural and biochemical defenses in olive resistance to and suggest that selecting resistant varieties could serve as a sustainable strategy for managing root rot in olive production.
一种导致橄榄树根腐病的土传病原体，对橄榄生产构成重大威胁。由于其对根部的侵袭性定殖以及传统防治方法效果有限，管理这种病原体仍然具有挑战性。鉴于与化学处理相关的问题，本研究通过评估结构和生化防御机制，在可控温室条件下评估了八个橄榄品种对诱导根腐病的抗性。温室试验表明，阿贝基纳、科罗内基和豪齐亚表现出很强的抗性，病情严重程度为0%，而摩洛哥皮乔利和朗格多克皮乔利高度易感，病情严重程度达到100%。生长参数差异显著，易感品种的根长（RL）、根鲜重（RFW）和根干重（RDW）大幅降低，而抗性品种的这些参数保持不变。虽然所有品种的茎长（SL）均未受影响，但易感品种的茎鲜重（SFW）和茎干重（SDW）显著降低。傅里叶变换红外（FTIR）光谱显示，抗性品种的木质素、纤维素和多糖水平保持稳定，而易感品种则表现出广泛的细胞壁降解。此外，抗性品种在感染后总多酚含量（TPC）和总黄酮含量（TFC）显著增加，而易感品种则大幅下降。这些发现突出了结构和生化防御在橄榄对[病原体名称未给出]抗性中的关键作用，并表明选择抗性品种可作为橄榄生产中管理根腐病的可持续策略。
