Infection of ZESPRI GOLD kiwifruit (<i>Actinidia chinensis</i> Hort16A) lenticels by <i>Pseudomonas syringae</i> pv <i>actinidiae</i>

• DOI: 10.30843/nzpp.2012.65.5398
• Publication Date: 2019-10-18T01:05:18Z
• Authors: N.J. Larsen; P.W. Sutherland; I.C. Hallett; M.K. Jones; I.P.S. Pushparajah; K.R. Everett
• Keywords: Lenticel; Actinidia chinensis; Pseudomonas syringae; Actinidia

Pseudomonas syringae pv actinidiae (Psa) is a bacterium whose virulent form (PsaV) causes severe infections of kiwifruit particularly Actinidia chinensis Hort16A Lenticels on canes function as pores allowing gaseous exchange The lenticellular structure penetrates through the periderm potentially bacterial entry and subsequent cortex infection Bacteria have been observed inside directly below lenticels from ca 3yearold woody tissue field To investigate this pathway further three wood ages were inoculated with strain PsaV at 109 cfu/ml Brown staining was 3 days after inoculation youngest (&lt; 1 year old) sectioned 2 4 weeks isolations conducted sterilised Psa visible postinoculation also isolated not in older