Kim Sujung, Kim Tae Hwa, Chung Mi-Nam, Lee YeongHoon, Lee Im Been, Lee HyeongUn, Park Won
Bioenergy Crop Research Institute, National Institute of Crop Science, Rural Development Administration, Muan, South Korea.
Front Plant Sci. 2022 May 3;13:897590. doi: 10.3389/fpls.2022.897590. eCollection 2022.
Sweetpotatoes require a storage period for year-round use and improved sweetness by starch degradation. However, long-term storage can cause root rot, and a large amount of sweetpotatoes can be discarded. Root rot is typically caused by pathogenic soil-borne spp., and the development of root rot induced by the characteristics of cultivating soil in stored sweetpotato has not yet been identified. In this study, the effect of spp. and microbial community in the cultivated soil on the root rot of sweetpotatoes was to be elucidated. Wounded sweetpotato were treated in soil cultures inoculated with or for 2 days, and showed symptoms of root rot after 2 months of storage. The three study fields (Naju, Yeongam A, and B) were subjected to the same curing and storage treatments after harvest, and the incidence of root rot was 1.7- to 1.8-fold different after 3 months of storage. Across the three fields, concentrations of spp. and of microbial communities differed according to the cultivation soil and period. In particular, Naju, which had the lowest incidence of root rot, had the lowest concentration of spp. before harvest, and the smallest change in diversity of the microbial community during the cultivation period. However, tuberous roots harvested from the fields showed no significant differences in antioxidant activity or lesion size with the treatment of 10 conidia/ml By solidifying the importance of cultivating soil and related microorganisms in the advancement of root rot of sweetpotato, our results may aid in preventing the decrease in the yield of cultivated sweetpotatoes through root rot control.
甘薯需要经过储存期以便全年使用，并通过淀粉降解来提高甜度。然而，长期储存会导致根腐病，大量甘薯可能会被丢弃。根腐病通常由土壤传播的致病菌种引起，而储存甘薯时因栽培土壤特性导致的根腐病发展情况尚未明确。在本研究中，旨在阐明栽培土壤中的菌种和微生物群落对甘薯根腐病的影响。将受伤的甘薯在接种了或的土壤培养物中处理2天，储存2个月后出现根腐病症状。三个研究田块（罗州、莞岛A和B）收获后进行相同的愈伤和储存处理，储存3个月后根腐病发病率相差1.7至1.8倍。在这三个田块中，菌种浓度和微生物群落根据栽培土壤和时期而有所不同。特别是，根腐病发病率最低的罗州，收获前菌种浓度最低，栽培期间微生物群落多样性变化最小。然而，用10个分生孢子/毫升处理后，从田间收获的块根在抗氧化活性或病斑大小方面没有显著差异。通过强化栽培土壤和相关微生物在甘薯根腐病发展中的重要性，我们的研究结果可能有助于通过控制根腐病来防止栽培甘薯产量下降。
