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首页> 外文期刊>Biotechnology Progress >Does Biopolymers Composition in Seeds Contribute to the Flax Resistance Against the Fusarium Infection?
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Does Biopolymers Composition in Seeds Contribute to the Flax Resistance Against the Fusarium Infection?

机译：种子中的生物聚合物成分是否有助于抵抗亚麻镰刀菌感染？

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摘要

Over the last decades, the cultivation of fibrous flax declined heavily. There are number of reasons for that fact; one of them is flax susceptibility to the pathogen infection. Damages caused mainly by fungi from genus Fusarium lead to the significant losses when cultivating flax, which in turn discourage farmers to grow flax. Therefore, to launch the new products from flax with attractive properties there is a need to obtain new flax varieties with increased resistance to pathogens. In order to obtain the better quality of flax fiber, we previously generated flax with reduced pectin or lignin level (cell wall polymers). The modifications altered also plants' resistance to the Fusarium infection. Undoubtedly, the plant defense system is complex, however, in this article we aimed to investigate the composition of modified flax seeds and to correlate it with the observed changes in the flax resistance to the pathogen attack. In particular, we evaluated the content and composition of carbohydrates (cell wall polymers: pectin, cellulose, hemicelluloses and mucilage), and phenyl-propanoid compounds (lignin, lignans, phenolics). From the obtained results we concluded that the observed changes in the vulnerability to pathogens putatively correlate with the antioxidant potential of phenylpropanoids accumulated in seeds, seco-isolariciresinol and coumaric acid diglycosides in particular, and with pectin level as a carbon source for pathogens. Surprisingly, relatively less important for the resistance was the physical barrier, including lignin and cellulose amount and cellulose structure. Certainly, the hypothesis should be verified on a larger number of genotypes.
机译：在过去的几十年中，纤维亚麻的种植大量减少。有许多原因可以说明这个事实。其中之一是亚麻容易感染病原体。主要由镰刀菌属真菌引起的损害导致亚麻种植时的重大损失，从而使农民不愿种植亚麻。因此，为了从具有诱人特性的亚麻中推出新产品，需要获得对病原体具有增强抗性的亚麻新品种。为了获得更好的亚麻纤维质量，我们先前生产的果胶或木质素水平降低了（细胞壁聚合物）。这些修饰也改变了植物对镰刀菌感染的抗性。毫无疑问，植物防御系统是复杂的，但是，在本文中，我们旨在研究改性亚麻籽的成分，并将其与所观察到的亚麻对病原体侵害的抗性变化相关联。特别是，我们评估了碳水化合物（细胞壁聚合物：果胶，纤维素，半纤维素和黏液）和苯基丙烷化合物（木质素，木脂素，酚类）的含量和组成。根据获得的结果，我们得出的结论是，观察到的对病原体的脆弱性变化可能与种子中积累的苯基丙烷类化合物的抗氧化能力有关，尤其是癸二异西里香脂醇和香豆酸二糖苷，以及果胶水平作为病原体的碳源。出人意料的是，对于抵抗力而言，相对较不重要的是物理屏障，包括木质素和纤维素含量以及纤维素结构。当然，该假说应在更多的基因型上得到证实。

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