First report of powdery mildew caused by Erysiphe vaccinii on Eucalyptus camaldulensis in India

IF 2.8 3区农林科学 Q2 PLANT SCIENCES

Physiological and Molecular Plant Pathology Pub Date : 2025-05-09 DOI:10.1016/j.pmpp.2025.102736

Nitika Negi , Ramkrishna , Maneesh S. Bhandari , Rajendra K. Meena , Shailesh Pandey

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Abstract

This study presents the first morphological and molecular identification of Erysiphe vaccinii affecting various Eucalyptus clones in India. The microscopic characteristics closely correspond to those described for the asexual morph of Erysiphe species. Phylogenetic analyses using maximum likelihood, maximum parsimony and Bayesian inference—based on the internal transcribed spacer (ITS) sequence of the newly collected Indian powdery mildew specimen from Eucalyptus, along with authentic sequences of 112 specimens representing 54 species retrieved from GenBank—conclusively identified the species as E. vaccinii. Pathogenicity was confirmed through artificial inoculation, with fungal features on experimentally infected leaves matching those observed on naturally infected leaves. Recent research has highlighted that this pathogen poses a significant threat to the global blueberry industry, necessitating further investigation to assess its distribution and potential impact on forestry in northern India.

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印度桉树上由牛痘erysihe vaccinii引起的白粉病首次报道

本文首次对影响印度桉树无性系的牛痘Erysiphe vaccinii进行了形态和分子鉴定。显微特征与无性形态的赤藓属植物非常相似。利用最大似然法、最大简约法和贝叶斯推理对桉树印度白粉菌标本的内部转录间隔（ITS）序列进行系统发育分析，并结合genbank检索到的54个物种112个标本的真实序列，最终确定该物种为牛痘伊螨。通过人工接种证实了致病性，实验侵染叶片上的真菌特征与自然侵染叶片上观察到的真菌特征相吻合。最近的研究强调，这种病原体对全球蓝莓产业构成重大威胁，需要进一步调查，以评估其分布和对印度北部林业的潜在影响。

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来源期刊

Physiological and Molecular Plant Pathology 生物-植物科学

CiteScore

4.30

自引率

7.40%

发文量

130

审稿时长

38 days

期刊介绍： Physiological and Molecular Plant Pathology provides an International forum for original research papers, reviews, and commentaries on all aspects of the molecular biology, biochemistry, physiology, histology and cytology, genetics and evolution of plant-microbe interactions. Papers on all kinds of infective pathogen, including viruses, prokaryotes, fungi, and nematodes, as well as mutualistic organisms such as Rhizobium and mycorrhyzal fungi, are acceptable as long as they have a bearing on the interaction between pathogen and plant.