Abstract
Zizania latifolia is a perennial plant native to East Asia. The swollen culm of Z. latifolia is a popular vegetable and traditional herbal medicine consumed in China and some other Asian countries. From 2019 to 2021, a sheath rot disease was found in Zhejiang Province of China. Symptoms mainly occurred in the leaf sheath showing as brown necrotic lesions surrounded by yellow halos. The pathogen fungal isolates were isolated from the affected sheaths. Ten representative isolates were selected for morphological and molecular identification by phylogenetic analyses of the translation elongation factor 1-α (TEF1) and the RNA polymerase II subunit beta (RPB2) gene regions. Based on the combined datasets, the fungal isolates were identified as Fusarium andiyazi. Koch’s postulates were confirmed by pathogenicity test, re-isolation and re-identification of the fungal isolates. To the best of our knowledge, this is the first report of sheath rot caused by F. andiyazi in Z. latifolia in China.
Highlights
2021, Rot a disease oflatifolia sheath rot was observed in Z. latifolia in Zhejiang
Disease symptoms occurred in theinleaf as waterter-soaking chlorosis spots on the ear mainly leaf near the sheath thesheath earlyshowing stage, expanded soaking chlorosis spots on the ear leaf near the sheath in the early stage, expanded anddiamand extended to the lower leaf sheath surrounded by yellow halos, with a diffusion extended to the lower leaf sheath surrounded by yellow halos, with a diffusion diameter of eter of more than 5 to 10 cm
Study, according to cultural and conidial morphology, translation elongation factor 1-α (TEF1)- and RPB2-sephylogenetic quence-based phylogenetic analysis and pathogenicity tests, the pathogen fungus was Number identified as F. andiyazi and confirmed to be the causal agent ofAccession sheath rot in Z. latifolia
Summary
Zizania latifolia belongs to the rice tribe (Oryzeae) of the grass family Poaceae [1], called jiaobai in China, due to its white bamboo [2]. Z. latifolia is a perennial aquatic herbaceous plant. Due to its unique taste and nutritional and economic importance, Z. latifolia has been domesticated as a vegetable crop for approximately 2000 years and has become a delicacy for people’s daily consumption. It is widely cultivated in China, Japan, Korea and countries in Southeast Asia [3]. The Jiangsu and Zhejiang provinces of China have the largest cultivation areas of this plant [4]
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