Synergies between Heat Disturbance and Inoculum Size Promote the Invasion Potential of a Bacterial Pathogen in Soil

Microorganisms

Chao Ma¹  Ziyun Zhang¹  Lin Jiang²  Hui Wang³  Xiaoyun Chen³  Xin Gong³  Huixin Li³  Manqiang Liu³  Feng Hu³ 

[1] Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, Key Laboratory of JiangHuai Arable Land Resources Protection and Eco-Restoration, College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China;School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA;Soil Ecology Lab, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China;

关键词: disturbance;    global change;    microbial invasion;    propagule pressure;    resource availability;   

DOI  :  10.3390/microorganisms10030630

来源: DOAJ

【 摘 要 】

Inoculum size contributes to the invasion potential of pathogens in the soil. However, the role of inoculum size in determining the fate of pathogens in disturbed soils remains unclear. Herein, we investigated the survival rates of a bacterial pathogen, Ralstonia solanacearum, in soils subjected to heat as a simulated disturbance. Our results revealed that heating increased soil resource availability but reduced resource differentiation between R. solanacearum and indigenous bacterial communities. In both non-heated and heated soils, invader abundances increased with inoculum size, with a greater magnitude in heated soils. Inoculum size and heat-induced increases in soil-available carbon and nitrogen best predicted invasion success. Altogether, our findings suggested that the invasion by soil pathogens could be predicted by synergies between heat perturbation and inoculum size.

【 授权许可】

Unknown