Integrated Use of Strain CG163 and Acibenzolar-S-Methyl for Management of Bacterial Canker in Kiwifruit
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An isolate of (strain = CG163) and the plant defence elicitor acibenzolar-S-methyl (ASM) were investigated for their ability to control leaf spot in kiwifruit caused by pv. biovar 3 (Psa). Clonal var. plantlets ('Hayward') were treated with ASM, CG163 or ASM + CG163 at seven and one day before inoculation with Psa. ASM (0.2 g/L) was applied either as a root or foliar treatments and CG163 was applied as a foliar spray containing 2 × 10 CFU/mL. Leaf spot incidence was significantly reduced by all treatments compared with the control. The combination of ASM + CG163 had greater efficacy (75%) than either ASM (55%) or CG163 (40%) alone. Moreover, treatment efficacy correlated positively with the expression of defence-related genes: pathogenesis-related protein 1 (PR1), β-1,3-glucosidase, Glucan endo 1,3-β-glucosidase (Gluc_PrimerH) and Class IV chitinase (ClassIV_Chit), with greater gene upregulation in plants treated with ASM + CG163 than by the individual treatments. Pathogen population studies indicated that CG163 had significant suppressive activity against epiphytic populations of Psa. Endophytic populations were reduced by ASM + CG163 but not by the individual treatments, and by 96-144 h after inoculation were significantly lower than the control. Together these data suggest that ASM + CG163 have complementary modes of action that contribute to greater control of leaf spotting than either treatment alone.
Shuai Y, Langbo Y, Yi Y, Danni C, Qingzhong P Front Microbiol. 2025; 15():1477320.
PMID: 39839114 PMC: 11747845. DOI: 10.3389/fmicb.2024.1477320.
Zhao X, Zhai Y, Wei L, Xia F, Yang Y, Yi Y Front Plant Sci. 2025; 15:1513438.
PMID: 39764227 PMC: 11701161. DOI: 10.3389/fpls.2024.1513438.
Li Y, Wang J, Sun T, Yu X, Yang Z, Zhao Y AMB Express. 2024; 14(1):35.
PMID: 38615116 PMC: 11016019. DOI: 10.1186/s13568-024-01688-2.
Santos M, Nunes da Silva M, Vasconcelos M, Carvalho S Front Plant Sci. 2024; 14:1306420.
PMID: 38273947 PMC: 10808555. DOI: 10.3389/fpls.2023.1306420.
Reglinski T, Wurms K, Vanneste J, Ah Chee A, Schipper M, Cornish D Int J Mol Sci. 2023; 24(21).
PMID: 37958935 PMC: 10647243. DOI: 10.3390/ijms242115952.