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Appl Microbiol Biotechnol

Title:		Reductive soil disinfestation effectively alleviates the replant failure of Sanqi ginseng through allelochemical degradation and pathogen suppression
Author(s):		Li Y; Wang B; Chang Y; Yang Y; Yao C; Huang X; Zhang J; Cai Z; Zhao J;
Address:		"School of Geography Science, Nanjing Normal University, Nanjing, 210023, China. School of Geography Science, Nanjing Normal University, Nanjing, 210023, China. xqhuang@njnu.edu.cn. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, 210023, China. xqhuang@njnu.edu.cn. Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, Nanjing Normal University, Nanjing, 210023, China. xqhuang@njnu.edu.cn. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, 210023, China. Key Laboratory of Virtual Geographical Environment (Nanjing Normal University), Ministry of Education, Nanjing, 210023, China. State Key Laboratory Cultivation Base of Geographical Environment Evolution (Jiangsu Province), Nanjing, 210023, China. Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, Nanjing Normal University, Nanjing, 210023, China. School of Geography Science, Nanjing Normal University, Nanjing, 210023, China. junzhao37@126.com. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, 210023, China. junzhao37@126.com. Key Laboratory of Virtual Geographical Environment (Nanjing Normal University), Ministry of Education, Nanjing, 210023, China. junzhao37@126.com"
Journal Title:		Appl Microbiol Biotechnol
Year:		2019
Volume:		20190215
Issue:		8
Page Number:		3581 - 3595
DOI:		10.1007/s00253-019-09676-4
ISSN/ISBN:		1432-0614 (Electronic) 0175-7598 (Linking)
Abstract:		"Replant failure has threatened the production of Sanqi ginseng (Panax notoginseng) mainly due to the accumulation of soil-borne pathogens and allelochemicals. Reductive soil disinfestation (RSD) is an effective practice used to eliminate soil-borne pathogens; however, the potential impact of RSD on the degradation of allelochemicals and the growth of replant Sanqi ginseng seedlings remain poorly understood. In this study, RSD was conducted on a Sanqi ginseng monoculture system (SGMS) and a maize-Sanqi ginseng system (MSGS), defined as SGMS_RSD and MSGS_RSD, respectively. The aim was to investigate the impact of RSD on allelochemicals, soil microbiomes, and survival rates of replant seedlings. Both short-term maize planting and RSD treatment significantly degraded the ginsenosides in Sanqi ginseng-cultivated soils, with the degradation rate being higher in the RSD treatment. The population of Fusarium oxysporum and the relative abundance of genus Fusarium were dramatically suppressed by RSD treatment. Furthermore, the RSD treatment, but not maize planting, markedly alleviated the replant failure of Sanqi ginseng, with the seedling survival rate being 52.7-70.7% 6 months after transplanting. Interestingly, RSD followed by short-term maize planting promoted microbial activity restoration, ginsenoside degradation, and ultimately alleviated the replant failure much better than RSD treatment alone (70.7% vs. 52.7%). Collectively, these results indicate that RSD treatment could considerably reduce the obstacles and might also act as a potential agriculture regime for overcoming the replant failure of Sanqi ginseng. Additional practices, such as crop rotation, beneficial microorganism inoculation, etc. may also still be needed to ensure the long-term efficacy of seedling survival"
Keywords:		Agriculture/*methods Biodiversity Environmental Restoration and Remediation/*methods Ginsenosides/chemistry/metabolism Microbiota Panax notoginseng/*growth & development/physiology Pheromones/*chemistry/metabolism Seedlings/growth & development/physiology;
Notes:		"MedlineLi, Yunlong Wang, Baoying Chang, Yafeng Yang, Yuting Yao, Chunzhi Huang, Xinqi Zhang, Jinbo Cai, Zucong Zhao, Jun eng 41701277/National Natural Science Foundation of China/ 41771281/National Natural Science Foundation of China/ 2018M630573/China Postdoctoral Science Foundation/ 184080H202B136/Startup Funds of Nanjing Normal University/ 2017YFD0200600/National Key Research and Development Program of China/ KYCX18_1201/Postgraduate Research & Practice Innovation Program of Jiangsu Province/ Germany 2019/02/17 Appl Microbiol Biotechnol. 2019 Apr; 103(8):3581-3595. doi: 10.1007/s00253-019-09676-4. Epub 2019 Feb 15"