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Mycorrhizal autochthonous consortium induced defense-related mechanisms of olive trees against Verticillium dahliae
Journal of Plant Diseases and Protection ( IF 2 ) Pub Date : 2020-08-10 , DOI: 10.1007/s41348-020-00365-3
Hanane Boutaj , Abdelghani Chakhchar , Abdelilah Meddich , Said Wahbi , Zainab El Alaoui-Talibi , Allal Douira , Abdelkarim Filali-Maltouf , Cherkaoui El Modafar

The present work aimed to investigate the effect of an autochthonous mycorrhizal consortium in enhancing olive tree tolerance against Verticillium dahliae. The bio-protective effect of this consortium “Rhizolive” on olive “Picholine Marocaine cultivar” infected with V. dahliae was assessed through monitoring disease symptoms development and through measuring the activities of enzymes involved in basal defense and secondary metabolism. The results revealed that “Rhizolive consortium” significantly (p < 0.05) reduced disease severity and incidence by 31% and 29%, respectively. The defoliation rate was also reduced by 35% in mycorrhizal-infected olive plants. “Rhizolive consortium” increased the lignin deposition and stimulated the phenylpropanoid pathway by increasing the phenylalanine ammonia-lyase (PAL) activity and accumulation of phenolic compounds in both roots and stems of plants infected with V. dahliae. The reduction in disease severity was accompanied by increased levels of lignin concentration, PAL activity and polyphenol content, particularly in the stems of olive plants. Our results clearly show that “Rhizolive consortium” inoculum protects olive tree from V. dahliae attacks and could thus constitute a biological approach contributing to the suppression of this telluric vascular pathogen.



中文翻译:

菌根土生联盟诱导橄榄树对黄萎病的防御相关机制

目前的工作旨在调查自发菌根菌群在增强橄榄树对黄萎病的耐受性中的作用通过监测疾病症状的发展并通过测量参与基础防御和次级代谢的酶的活性,评估了该“ Rhizolive”财团对感染大丽花弧菌的橄榄“ Picholine Marocaine品种”的生物保护作用。结果显示“根瘤菌财团”显着(p <0.05)分别将疾病严重性和发生率降低了31%和29%。菌根感染的橄榄植物的脱叶率也降低了35%。“ Rhizolive财团”通过增加苯丙氨酸氨解酶(PAL)的活性以及酚类化合物在感染大麦草的根和茎中的积累而增加了木质素的沉积并刺激了苯丙氨酸途径疾病严重程度的降低伴随着木质素浓度,PAL活性和多酚含量的增加,特别是在橄榄植物的茎中。我们的结果清楚地表明,“根瘤菌联盟”接种物可以保护橄榄树免受大弧菌的侵害 细菌的攻击,因此可能构成有助于抑制这种大肠血管病原体的生物学方法。

更新日期:2020-08-10
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