First Report of Pectobacterium aroidearum Causing Soft Rot on Zamioculcas zamiifolia

Author:

Park Kyoung-Taek,Hong Soo-Min,Ten Leonid N.,Back Chang-Gi,Lee Seung-Yeol,Kang In-Kyu,Jung Hee-YoungORCID

Abstract

<i>Zamioculcas zamiifolia</i> is a popular indoor ornamental plant in Korea. In August 2021, a severe outbreak of soft rot disease affected <i>Z. zamiifolia</i> in Emseong, Chungcheongbuk-do, Korea. Infected plants displayed wilting, water-soaked lesions, stem collapse, and green-brown discoloration. The bacterial strain KNUB-05-21 was isolated from infected stems and identified as <i>Pectobacterium aroidearum</i> using 16S rRNA nucleotide sequencing and multilocus sequence analysis based on partial sequences of <i>dnaX, leuS</i>, and <i>recA</i> genes. Confirmation of its affiliation with <i>P. aroidearum</i> was also obtained through biochemical and morphological characterization. To confirm the pathogenicity of strain KNUB-05-21, its suspension was injected into <i>Z. zamiifolia</i> stems. Within a week, soft rot developed on the stems, exhibiting symptoms similar to those observed in field-infected plants. The reisolated strain was identical to those of <i>P. aroidearum</i>. Before this study, <i>P. aroidearum</i> was not reported as a causative pathogen of <i>Z. zamiifolia</i> soft rot in Korea.

Funder

Korea Institute of Planning and Evaluation for Technology in Food, Agriculture and Forestry

Ministry of Agriculture, Food and Rural Affairs

Publisher

Korean Society of Plant Pathology

Subject

Plant Science,Agronomy and Crop Science,Molecular Biology,Biochemistry,Biotechnology

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