Stem Blight of Blueberry Caused by sp. nov. in China.

Clicks: 235
ID: 1911
2019
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Abstract
Blueberries ( spp.) are largely cultivated in China because of their nutritional benefits and economic value. Blueberry stem blight caused by members of the Botryosphaeriaceae has become one of the most severe diseases affecting blueberry cultivation in China. In this study, we examined the causal agent of blueberry stem blight at commercial greenhouse farms in the suburban area of Beijing, China. In total, 37 isolates of Botryosphaeriaceae were obtained from 100 stem blight samples of blueberry. Twelve of 37 strains were morphologically consistent with the genus , showing ellipsoid to ovoid, one-celled, hyaline conidia that sometimes turned brown, with median septa and longitudinal striations when mature. These 12 strains were identified as belonging to a novel fungal species, , based on phylogenetic analysis of the concatenated internal transcribed spacer, RNA polymerase II gene, β-tubulin gene, and translation elongation factor-1α gene sequences as well as morphological characteristics. Pathogenicity tests indicated that can cause twig blight on blueberry seedlings in the greenhouse. Mycelial growth of . occurred at pH values ranging from 3.0 to 10.0, with an optimum at 6.2, and at temperatures from 15 to 40°C, with an optimum at 30.3°C. Of the seven carbon sources tested, sucrose, fructose, and glucose were all highly efficient in supporting the mycelial growth of , and xylose was the least effective. Of six nitrogen sources tested, yeast extract and tryptone best promoted mycelial growth of . The ability of to grow at high temperatures may help to explain its occurrence in Beijing greenhouses in this study.
Reference Key
zhao2019stemplant Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Zhao, Lin;Wang, Yu;He, Wei;Zhang, Ying;
Journal Plant disease
Year 2019
DOI
10.1094/PDIS-01-19-0079-RE
URL
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