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Botryosphaeriaceae species involved in crown and root rot of English ivy ( Hedera helix L.)
Australasian Plant Pathology ( IF 0.9 ) Pub Date : 2021-05-10 , DOI: 10.1007/s13313-021-00797-x
Nahid Akbarpour , Hamid Mohammadi , Homayoun Farahmand

During the study of fungal pathogens associated with ornamental plants in Kerman province, southeastern Iran, a serious yellowing and decline symptom was observed on English ivy (Hedera helix L.) in some landscape areas. In order to identify the disease-causing agents samples were collected from infected plants exhibiting yellowing, wilting, reduced growth of shoots, foliage necrosis as well as crown and root rot. Fungal isolations were made from the roots, crowns and stems of symptomatic plants, as well as fruiting bodies formed on the surface of affected root and crown parts, onto potato dextrose agar (PDA). In this work, 54 Botryosphaeriaceae isolates were obtained from infected English Ivy plants. According to morphological characteristics and DNA sequence data obtained from the rDNA-ITS and translation elongation factor 1-α (tef-1α) gene, these isolates were identified as Neofusicoccum parvum, Botryosphaeria dothidea and Diplodia seriata. Pathogenicity tests were confirmed by inoculating potted English ivy plants. Inoculated plants showed wilting, black crown and root rot and wood discoloration within 60 days after inoculation. Neofusicoccum parvum being the most virulence species based on the length of vascular necrosis in the wood. Neofusicoccum parvum and D. seriata are reported here confirmed for the first time on English ivy. This is also the first record of B. dothidea on this host in Iran and outside China.

更新日期:2021-05-10
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