Zhang Lin, Zhao Lili, Liang Chen, Yu Luhan, Zhang Ying
School of Ecology and Nature Conservation, Beijing Forestry University, Beijing 100083, China Beijing Forestry University Beijing China.
Key Laboratory of Integrated Crop Pest Management of Shandong Province, College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao, Shandong 266109, China Qingdao Agricultural University Shandong China.
MycoKeys. 2024 Aug 30;108:95-113. doi: 10.3897/mycokeys.108.127734. eCollection 2024.
species can function as plant pathogens, saprobes or endophytes on a wide variety of plant hosts and are considered amongst the ten most significant genera of plant pathogens globally. China contributes almost half the walnut production in the world. However, species occurring on walnut remain largely unresolved in China. To explore the species found on walnut in China, 470 walnut fruit or leaf samples with anthracnose were collected from 14 main walnut-producing regions across seven provinces. A total of 165 strains were isolated from these samples. The isolates were identified, based on morphological characteristics and sequence analyses of , , , ITS and . Twelve species, including 11 known species (, , , , , , , , , and ) and a novel species ( ) were identified. The species distribution revealed regional prevalence as follows: was the most dominant species in Gansu, and in Shandong, in Beijing, in Shaanxi and in Yunnan. was the sole species isolated in Sichuan and Xinjiang Provinces. Koch's postulates were fulfilled, demonstrating that all 12 species cause anthracnose on walnut. This is the first report of , and as pathogens of walnut anthracnose worldwide.
该属物种可作为植物病原体、腐生菌或内生菌存在于多种植物宿主上，被认为是全球十大最重要的植物病原体属之一。中国的核桃产量几乎占世界的一半。然而，在中国，核桃上出现的该属物种在很大程度上仍未得到解决。为了探索中国核桃上发现的该属物种，从七个省份的14个主要核桃产区收集了470份患有炭疽病的核桃果实或叶片样本。从这些样本中总共分离出165株该属菌株。基于该属、、、ITS和的形态特征和序列分析，对这些分离株进行了鉴定。鉴定出12个物种，包括11个已知的该属物种（、、、、、、、、、和）和一个新物种（）。物种分布显示出区域流行情况如下：在甘肃是最主要的物种，在山东是和，在北京是，在陕西是，在云南是。是在四川和新疆仅分离出的物种。科赫法则得到了验证，表明所有12个物种都会导致核桃炭疽病。这是、和作为核桃炭疽病病原体在全球的首次报道。
