Institute of Microbiology, School of Ecology and Nature Conservation, Beijing Forestry University, Beijing 100083, People's Republic of China.
Plant Dis. 2022 Sep;106(9):2338-2347. doi: 10.1094/PDIS-09-21-2068-RE. Epub 2022 Aug 10.
Blueberries ( spp.) have been considered to be a superfood because of their health benefits. Stem blight or dieback of blueberry has been frequently observed in commercial plantations, with incidences between 15 and 30% being observed in China. The causal agents of blueberry stem blight and dieback were surveyed at four commercial blueberry plantations in the Shandong, Fujian, Guizhou, and Yunnan Provinces of China during 2017 and 2019. Twenty-eight isolates of were obtained from 75 diseased and dead stem samples. Two taxa were identified. Of these, one novel species, , was identified based on morphological characteristics and DNA sequence analysis of the concatenated internal transcribed spacer, the translation elongation factor-1α gene, and the beta-tubulin gene. Koch's postulates tests indicated that was pathogenic toward blueberry. is the other species isolated in this study. The optimal temperature for mycelial growth was 30°C for both and . . , however, was more virulent than . in this study at temperatures ranging from 25 to 30°C. Coinoculation of and did not lead to increased disease severity. On the contrary, the aggressiveness of . was suppressed by the presence of . at 25 to 35°C.
蓝莓（ spp.）因其对健康的益处而被认为是一种超级食品。在中国，商业种植园中经常观察到蓝莓茎枯萎或坏死，发病率为 15%至 30%。2017 年至 2019 年，在中国山东、福建、贵州和云南的四个商业蓝莓种植园中对蓝莓茎枯萎和坏死的病原体进行了调查。从 75 个患病和死亡的茎样本中获得了 28 个 的分离物。鉴定出两个分类群。其中，一个新种， ，根据形态特征和内部转录间隔区、翻译延伸因子 1α 基因和β-微管蛋白基因的连接体 DNA 序列分析进行了鉴定。柯赫氏假设测试表明 对蓝莓具有致病性。 是本研究中分离出的另一种。和 的最适菌丝生长温度均为 30°C。然而，在 25 至 30°C 的温度范围内， 比 更具毒力。 和 的共接种不会导致疾病严重程度增加。相反，在 25 至 35°C 时， 的侵袭性被 的存在所抑制。
