一株分离自茶轮斑病病叶的病原物鉴定

doi:10.13305/j.cnki.jts.2026.02.001

Abstract

Abstract: Tea grey blight is one of the most important diseases in tea producing areas in China, which is common in old leaves, mature leaves and young bud leaves. In this study, a strain L352 was isolated and purified from tea grey blight leaves in Duyun City, Guizhou. The strain L352 was identified based on morphological characteristics and a multi-gene phylogenetic tree was established using the ITS, β-tub and EF-1α genes. The results show that the conidia of strain L352 were mostly composed of 5 cells with 4 transverse-septa, featuring three pigmented cells in the middle. Occasionally, 6 cells with 5 transverse-septa were observed, containing four pigmented cells in the middle. The phylogenetic tree indicates that it was clustered into a relatively independent clade with Pestalotiopsis rosea, with a support rate of 100%. The pathogen was finally identified as Pestalotiopsis rosea, and it was the first discovery of this species causing tea grey blight disease in Camellia sinensis.

Key words: tea grey blight, Pestalotiopsis, Pestalotiopsis rosea, identification

CLC Number:

LIU Rong, YAO Yuxian, WANG Xing′e, LIU Bingxiang, SHUAI Qin, ZHAO Yongtian. Identification of A Pathogen Isolated from Tea Grey Blight Leaves[J]. Journal of Tea Science, 2026, 46(2): 311-317.

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Identification of A Pathogen Isolated from Tea Grey Blight Leaves

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