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<p>Tea anthracnose, caused by <i>Colletotrichum</i> species, represents a critical production constraint in tea industry of Xizang, China. However, no systematic study has investigated <i>Colletotrichum</i> species associated with tea anthracnose in this region. In this study, 70 <i>Colletotrichum</i> isolates were obtained from tea leaves collected across nine sampling sites in Nyingchi's three primary production areas. Multilocus phylogenetic analysis and morphological characterization identified five species: <i>C. boninense</i>, <i>C. camelliae</i>,<i> C. jiangxiense</i>, <i>C. fructicola</i>, and <i>C. karsti</i>. Among these, <i>C. camelliae</i> was the most prevalent species in Nyingchi's tea plantations. Pathogenicity assays on the dominant tea cultivar <i>Camellia sinensis</i> ‘Zhonghuang No. 1’ and ‘Fuding-dabaicha’ revealed that <i>C. camelliae</i> and <i>C. jiangxiense</i> exhibited higher virulence. <i>Colletotrichum boninense</i> and <i>C. fructicola</i> exhibited significantly weaker pathogenicity on <i>Camellia sinensis</i> ‘Zhonghuang No. 1’ than on ‘Fuding-dabaicha’. This study provides the first comprehensive identification and pathogenicity evaluation of <i>Colletotrichum</i> species causing tea anthracnose in Xizang's main tea plantations, offering critical insights for regional disease diagnosis and management.</p>

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Diversity and pathogenicity of Colletotrichum species associated with tea anthracnose in Nyingchi, Xizang, China

  • 期刊论文

  • 发表日期：

    2026年3月9日

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  • Huai Jin,
  • Tsering Yangjin,
  • Xuying Lan,
  • Feng Zhang,
  • Hongyan Xia,
  • Wenfeng Gong

摘要

Tea anthracnose, caused by Colletotrichum species, represents a critical production constraint in tea industry of Xizang, China. However, no systematic study has investigated Colletotrichum species associated with tea anthracnose in this region. In this study, 70 Colletotrichum isolates were obtained from tea leaves collected across nine sampling sites in Nyingchi's three primary production areas. Multilocus phylogenetic analysis and morphological characterization identified five species: C. boninense, C. camelliae, C. jiangxiense, C. fructicola, and C. karsti. Among these, C. camelliae was the most prevalent species in Nyingchi's tea plantations. Pathogenicity assays on the dominant tea cultivar Camellia sinensis ‘Zhonghuang No. 1’ and ‘Fuding-dabaicha’ revealed that C. camelliae and C. jiangxiense exhibited higher virulence. Colletotrichum boninense and C. fructicola exhibited significantly weaker pathogenicity on Camellia sinensis ‘Zhonghuang No. 1’ than on ‘Fuding-dabaicha’. This study provides the first comprehensive identification and pathogenicity evaluation of Colletotrichum species causing tea anthracnose in Xizang's main tea plantations, offering critical insights for regional disease diagnosis and management.