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首页> 外文期刊>Annals of Applied Biology >Resistance to broomrape (Orobanche crenata) in faba bean (Vicia faba): cell wall changes associated with prehaustorial defensive mechanisms
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Resistance to broomrape (Orobanche crenata) in faba bean (Vicia faba): cell wall changes associated with prehaustorial defensive mechanisms

机译：对蚕豆（Vicia faba）的b帚（Orobanche crenata）的抗性：与壁虎前防御机制相关的细胞壁变化

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摘要

Broomrapes (Orobanche spp.) are parasitic angiosperms, which attach to the roots of the hosts to take water and nutrients from them. No complete control measures are available to date, but breeding for resistance remains as one of the most feasible and environmentally friendly methods. However, the mechanisms governing the interaction between these parasites and the host are not yet well understood. We studied the cellular changes associated with the resistance to Orobanche crenata in faba bean as mechanisms involved or responsible for resistance. Two cultivars of faba bean, resistant and susceptible to O. crenata infection, were used. The evolution of the infection and the changes in the cell and tissue organization and wall components of the host cells were followed and evaluated in both genotypes. Samples of compatible and incompatible interactions were fixed and sectioned, and specific cytochemical methods for different cell components were applied, results being analysed under light and epifluorescence microscopy. A higher proportion of O. crenata seedlings unable to penetrate the root was found on the resistant genotype. Reinforcement of cell walls by callose deposition hampers parasite penetration through the cortex. Lignification of endodermal cells prevents further penetration of the parasite into the central cylinder..
机译：room帚（Orobanche spp。）是寄生的被子植物，附着在宿主的根部以吸收水分和养分。迄今为止尚无完整的控制措施，但抗性育种仍是最可行，最环保的方法之一。然而，控制这些寄生虫与宿主之间相互作用的机制尚未被很好地理解。我们研究了与蚕豆对Orobanche crenata的抗性相关的细胞变化，作为涉及或引起抗性的机制。使用了两种对蚕豆O. crenata有抗性和敏感性的蚕豆。跟踪并评估了两种基因型中感染的演变以及宿主细胞的细胞和组织组织以及壁成分的变化。将相容性和不相容性相互作用的样品固定并切开，并针对不同细胞组分应用特定的细胞化学方法，并在光镜和落射荧光显微镜下分析结果。在抗性基因型上发现较高比例的不能穿透根的O. crenata幼苗。愈伤组织沉积增强细胞壁会阻碍寄生虫穿透皮层。内胚层细胞的木质化可防止寄生虫进一步渗透到中央圆柱体中。

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