The Plant Pathology Journal (2022) 38, 403-409

Diane Avalos-Ruiz, Leonid N. Ten, Chang-Kil Kim, Seung-Yeol Lee and Hee-Young Jung (2022)
Isolation and identification of ice nucleation active Fusarium strains from rapid apple declined trees in Korea
The Plant Pathology Journal 38 (4), 403-409
Abstract: In biological particles such as Fusarium species, ice nucleation activity (INA) has been observed. Fusarium strains isolated from apple declined trees in Korea were identified with a multilocus sequence analysis using the tef1 and rpb1 genes. Droplet-freezing and tube-freezing assays were used to determine the INA of the strains, using Pseudomonas syringae pv. syringae KACC 21200 as a positive control and resulting in seven INA+ fungal strains that were identified as F. tricinctum (KNUF-21-F17, KNUF-21-F18, KNUF-21-F29, KNUF-21-F32, KNUF-21-F38, KNUF-21-F43, and KNUF-21-F44). The effect of Fusarium INA+ KNUF-21-F29 was compared to that of INA- strains on Chrysanthemum morifolium cv. Shinma explants. A higher callus formation and no-shoot formation were observed, suggesting that fungal INA could play a role in cold injuries and be a factor to consider in rapid apple decline. To the best of our knowledge, this is the first report of INA fungal strains isolated in Korea.
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Database assignments for author(s): Hee-Young Jung

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Fusarium acuminatum	Apple (Malus)	Korea-South
	Fusarium tricinctum	Apple (Malus)	Korea-South
	Fusarium commune	Apple (Malus)	Korea-South