Preharvest multiple fungicide stroby sprays promote wound healing of harvested potato tubers by activating phenylpropanoid metabolism
Preharvest multiple fungicide stroby sprays promote wound healing of harvested potato tubers by activating phenylpropanoid metabolism
复制标题
1).采前多种杀菌剂喷雾剂通过激活苯丙素代谢促进采后马铃薯块茎伤口愈合
DOI：
10.1016/j.postharvbio.2020.111328
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发表时间：
2021-01-01
影响因子：
7
通讯作者：
Prusky, Dov
中科院分区：
文献类型：
--
作者：
Ge, Xiangzhen;Zhu, Yan;Prusky, Dov
伤口愈合是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，有必要开发一种加速伤口愈合的技术。施特罗比是一种具有诱导抗性的生物源杀菌剂，是否能提高马铃薯块茎的伤伤能力尚未见报道。马铃薯植物(cv。本试验在马铃薯块茎发育过程中反复喷施0.4 g L-1 (w/v) Stmby，评价采前施施stroby处理对收获马铃薯块茎创面愈合的影响。结果表明，Stmby喷雾可降低接种硫镰刀菌后收获块茎的失重和病害指数。冻干处理后的马铃薯块茎损伤部位木质素、木质素和木质素的积累加快，厚度增加。随着采伐块茎创口处苯丙氨酸解氨酶（PLA）活性的增加，肉桂酸、咖啡酸、阿魏酸和对香豆酸的合成加速，总酚类物质、类黄酮和木质素的含量增加。结果表明，收获前多次喷施施Stroby可通过激活苯丙素途径促进马铃薯块茎创面愈合。
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) Stmby 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 Stmby 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.