Paraphoma root rot of alfalfa ( Medicago sativa ) in Inner Mongolia, China
Autor: | C. Nzabanita, Yanzhong Li, Q. W. Liang, S. Cao |
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Rok vydání: | 2019 |
Předmět: |
0106 biological sciences
0301 basic medicine biology Inoculation fungi food and beverages Plant Science Fungus Horticulture biology.organism_classification Inner mongolia 01 natural sciences Conidium 03 medical and health sciences 030104 developmental biology Genetics Root rot Medicago sativa Internal transcribed spacer Paraphoma radicina Agronomy and Crop Science 010606 plant biology & botany |
Zdroj: | Plant Pathology. 69:231-239 |
ISSN: | 1365-3059 0032-0862 |
Popis: | Root rot symptoms were observed in fields of alfalfa in Chifeng city, Inner Mongolia, China in 2016. Disease incidences of seven alfalfa varieties planted in 2014 ranged from 56% to 95%, while incidence of Gongnong No. 1 planted in 2016 was 8%, 31% and 76% in 2016, 2017 and 2018, respectively. Paraphoma isolates were consistently recovered from black necrotic root tissues of diseased plants with a frequency of 77.1%. Based on morphological characters and phylogenetic analysis of rDNA internal transcribed spacer (ITS), elongation factor 1‐α (EF1‐α) and β‐tubulin (TUB), this fungus was identified as Paraphoma radicina. Glasshouse pathogenicity experiments showed that P. radicina significantly reduced above‐ and below‐ground biomass of alfalfa plants 2 months after inoculation. Paraphoma radicina infected 70% of the plants inoculated with a root dip in conidia, and these symptoms were consistent with the symptoms in the field. Paraphoma radicina was successfully reisolated from disease roots of the inoculated alfalfa plants. This is the first report of P. radicina as the causal agent of alfalfa root rot in China. |
Databáze: | OpenAIRE |
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