Deciphering the effects of crop rotation on tobacco bacterial wilt through general and specific disease suppression

Ma, Hai-kun; Wang, Zhi-jiang; Li, Meng-jiao; Rao, Qing-lin; Cai, Jun; Gu, Xiao-fei

doi:10.1007/s10658-023-02779-9

Cited by 3 publications

(1 citation statement)

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“…For example, crop rotation is used to maintain the rich array of plant species in the ecosystem (Larkin 2015), thereby reducing pathogen stress on plants via improving the diversity and structure of rhizosphere microorganisms (Cook 2006;D'Acunto et al 2018). Studies have proven that a reasonable crop rotation pattern can coordinate soil nutrients (Jagadamma et al 2008), optimize soil chemical properties, enhance the circulation and cooperation of soil microorganisms (Ben Abdallah et al 2023), and reduce the occurrence of soil-borne diseases (Huang et al 2022;Ma et al 2023;Niu et al 2017a; Yang et al 2018). For example, three-year radish green manure rotation had a cumulative effect on the soil inhibition of tomato-related pathogens, and tilting radish signi cantly reduced the occurrence of tomato bacterial wilt (Ben Abdallah et al 2023).…”

Section: Introductionmentioning

confidence: 99%

Effect of tobacco–radish rotation for different years on bacterial wilt and rhizosphere microbial communities

Dai,

Li,

Wang

et al. 2024

Preprint

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Tobacco bacterial wilt is a major limiting factor for tobacco production and development, and it is more likely to occur under perennial single cropping of tobacco. In recent years, the rotation of tobacco-radish has gradually become popular. Therefore, we studied the effects of years of tobacco–radish rotation on tobacco bacterial wilt occurrence and rhizosphere microorganisms. The results indicated that both SY and TY could significantly reduce the risk of tobacco bacterial wilt occurrence, and SY had the lowest disease index. The rotation of radish plants significantly increased the soil pH but decreased the contents of alkali-hydrolysed nitrogen and organic matter in the soil. Alkali-hydrolysed nitrogen and pH are the key factors affecting the composition of the bacterial community. Furthermore, radish rotation changed the composition of the soil microbial community, increased the diversity of the bacterial community, and significantly altered the bacterial community structure. At the genus level, the abundance of Sphingomonas species negatively correlated with Ralstonia increased significantly, while the relative abundance of Rhodanobacterspecies positively correlated with Ralstoniadecreased significantly. Disease index, pH and available phosphorus were the main factors affecting the variation in different bacterial genera. The network analysis results showed that Ralstoniawas less connected in the network than in the CK group, and the SY treatment group had a more complex bacterial network structure. Overall, 2 years of tobacco and radish rotation improved the bacterial community structure of the rhizosphere soil and alleviated the harm caused by tobacco bacterial wilt, which is highly important for the stability and health of the rhizosphere soil ecosystem.

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