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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Combinatorially selected defense peptides protect plant roots from pathogen infection
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Combinatorially selected defense peptides protect plant roots from pathogen infection

机译：组合选择的防御肽可保护植物根部免受病原体感染

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摘要

Agricultural productivity and sustainability are continually challenged by emerging and indigenous pathogens. Currently, many pathogens can be combated only with biocides or environmentally dangerous fumigants. Here, we report a rapid and pathogen-specific strategy to reduce infection by organisms that target plant roots. Combinatorially selected defense peptides, previously shown to effect premature encystment of Phytophthora capsici zoospores, were fused to maize cytokinin oxidase/dehydrogenase as a display scaffold. When expressed in tomato roots, the peptide-scaffold constructs were secreted and accumulated to sufficient concentrations in the rhizosphere to induce zoospore encystment and thereby deter taxis to the root surface. Pathogen infection was significantly inhibited in roots expressing bioactive peptides fused to the maize cytokinin oxidase/dehydrogenase scaffold. This peptide-delivery technology is broadly applicable for rapid development of plant defense attributes against plant pathogens.
机译：新兴和本土病原体不断挑战着农业生产力和可持续性。当前，许多病原体只能用杀生物剂或对环境有害的熏蒸剂来防治。在这里，我们报告了一种快速且针对病原体的策略，以减少针对植物根部的生物体的感染。先前已证明可对辣椒疫霉菌游动孢子进行提前包囊的组合选择的防御肽与玉米细胞分裂素氧化酶/脱氢酶融合为展示支架。当在番茄根中表达时，肽支架构建体被分泌并在根际中积累到足够的浓度，以引起游动孢子囊化，从而阻止滑行到达根表面。在表达与玉米细胞分裂素氧化酶/脱氢酶支架融合的生物活性肽的根中，病原体感染被显着抑制。这种肽递送技术广泛适用于快速开发针对植物病原体的植物防御特性。

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