Abstract Wound healing is an inherent property of harvested potato tubers. However natural healing process usually needs 2-4 weeks, which increased water loss and pathogen invasion. Therefore, it is necessary to develop a technology to accelerate wound healing processing. Stroby is a biogenic fungicide with induced resistance and it has not been reported whether it can improve the wound ability of potato tubers. Potato plants (cv. Longshu 7) were repeatedly sprayed with 0.4 g L-1 (w/v) Stroby during tuber development, and the effect of preharvest stroby spraying treatment on wound healing in harvested potato tubers was evaluated in this study. The results showed that Stroby sprays reduced weight loss and disease index of harvested tubers inoculated with Fusarium sulphureum. Stroby-treated potato tubers also showed accelerated accumulation and increased thickness of the suberin polyphenolic, suberin polyaliphatic and lignin at wound sites of tubers. As the major substrates of suberin synthesis, cinnamic, caffeic, ferulic and p-coumaric acids were accelerated, and the content of total phenolics, flavonoids and lignin were increased along with increased activity of phenylalanine ammonia-lyase (PLA) at wound sites of harvested tubers. The results suggest that preharvest multiple sprays with Stroby on potato plants could accelerate wound healing of harvested tubers via activated phenylpropanoid pathway.

中文翻译：

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收获前多种杀菌剂喷雾剂通过激活苯丙素代谢促进收获马铃薯块茎的伤口愈合

摘要 伤口愈合是收获的马铃薯块茎的固有特性。然而自然愈合过程通常需要2-4周，这增加了水分流失和病原体入侵。因此，有必要开发一种技术来加速伤口愈合过程。Stroby是一种具有诱导抗性的生物杀菌剂，是否能提高马铃薯块茎的伤口能力尚未见报道。马铃薯植株（cv. Longshu 7）在块茎发育过程中反复喷洒 0.4 g L-1 (w/v) Stroby，本研究评估了收获前 Stroby 喷洒处理对收获马铃薯块茎伤口愈合的影响。结果表明，Stroby 喷雾剂减少了接种了镰刀菌的收获块茎的重量损失和疾病指数。Stroby 处理的马铃薯块茎还显示出块茎伤口部位的木栓质多酚、木栓质多脂族和木质素的加速积累和厚度增加。作为木栓素合成的主要底物，肉桂酸、咖啡酸、阿魏酸和对香豆酸加速，总酚类、黄酮类和木质素的含量随着收获部位苯丙氨酸解氨酶（PLA）的活性增加而增加。块茎。结果表明，收获前在马铃薯植株上多次喷洒 Stroby 可以通过活化的苯丙烷途径加速收获块茎的伤口愈合。总酚类、黄酮类和木质素的含量随着收获块茎伤口部位苯丙氨酸解氨酶（PLA）活性的增加而增加。结果表明，收获前在马铃薯植株上多次喷洒 Stroby 可以通过活化的苯丙烷途径加速收获块茎的伤口愈合。总酚类、黄酮类和木质素的含量随着收获块茎伤口部位苯丙氨酸解氨酶（PLA）活性的增加而增加。结果表明，收获前在马铃薯植株上多次喷洒 Stroby 可以通过活化的苯丙烷途径加速收获块茎的伤口愈合。