In planta transfer of the gene(s) for virulence between isolates of Pseudomonas syringae pv. atropurpurea.

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  • SATO Mamoru
    National Institute of Agrobiological Resources National Institute of Agro-Environmental Sciences

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  • 植物内における<i>Pseudomonas syringae</i> pv. <i>atropurpurea</i>の病原性遺伝子の菌株間移行
  • 植物内におけるPseudomonas syringae pv.atropurpureaの病原性遺伝子の菌株間移行〔英文〕
  • ショクブツナイ ニ オケル Pseudomonas syringae pv.a

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Abstract

A phytotoxin (coronatine)-producing ability of Pseudomonas syringae pv. atropurpurea NIAES 1309 is associated with 58 Mdal plasmid designated as pCOR1. A conjugative plasmid pBPW1:: Tn7 from P. syringae pv. tabaci BR2 was introduced into the strain NIAES 1309. When the strain was mated with avirulent strains derived from NIAES 1309 in Italian ryegrass, pBPW1:: Tn7 was transferred to the avirulent strain at a high frequency. Twenty strains out of 894 transconjugants contained the pCOR1 plasmid co-transferred with pBPW1:: Tn7. All of these strains produced coronatine and induced typical symptoms on Italian ryegrass. That is, in planta transfer of virulence genes between isolates of phytopathogenic pseudomonad was confirmed.

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