Fig. 6: Establishment of beneficial synthetic communities within the Green cluster, their suppression capabilities against PCS S. scabies, and impacts on tuber physiological indices.
From: Geocaulosphere soil bacterial community drives potato common scab outcomes beyond pathogen abundance
A Sixty strains originating from the Green cluster were examined for their ability to inhibit PCS S. scabies. The diameter of the red dot represents the size of the inhibition zone achieved by each strain. B Growth curves of four beneficial strains, including Flavobacterium nitrogenifigens HT2-2, Microbacterium phyllosphaerae HR3-14, Stenotrophomonas maltophilia TL3-11, and Stenotrophomonas rhizophila DL3-15. C The suppressive effects of the four strains and their various combinations against PCS S. scabies at 12 h, 24 h, and 36 h, showcasing the dynamic effectiveness of these synthetic communities. D, E The synthetic community FMSS demonstrates its efficacy in suppressing PCS severity (D) and promoting potato yield (E). F The FMSS down-regulated the relative expression of txtAB gene in PCS S. scabies. G The FMSS also exhibits influences on various physiological indices of potatoes, including activities of catalase (CAT), peroxidase (POD), superoxide dismutase (SOD), aseorbateperoxidase (APX), polyphenol oxidase (PPO), phenylalanine ammonia lyase (PAL), O2- accumulation and soluble protein content.
