Analysis of Fusarium graminearum Species Complex from Freshly Harvested Rice in Jiangsu Province (China)
Analysis of Fusarium graminearum Species Complex from Freshly Harvested Rice in Jiangsu Province (China)
复制标题
中国江苏省新收稻米中禾谷镰刀菌物种复合体的分析
DOI：
10.1094/pdis-01-20-0084-re
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发表时间：
2020-08-01
期刊：
影响因子：
4.5
通讯作者：
Olaniran, Ademola O.
中科院分区：
文献类型：
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作者：
Dong, Fei;Zhang, Xiao;Olaniran, Ademola O.
禾谷镰刀菌种复合体（FGSC）是引起世界范围内谷物赤霉病的主要病原菌。近年来在江苏省发现了水稻赤霉病的症状，包括颖壳变黑或布朗宁。为了提高我们对所涉及的病原体的理解，从新鲜收获的大米样品中获得201个FGSC分离物，并通过系统发育分析进行鉴定。在201株FGSC中，有196株为F. asiaticum，其余5株为F.禾谷早熟禾单端孢霉烯的化学型和化学成分分析表明，68.4%的单端孢霉烯属真菌是单端孢霉烯属真菌。asiaticum分离物为3-乙酰脱氧雪腐镰刀菌烯醇（3ADON）化学型，其余为雪腐镰刀菌烯醇（NIV）化学型。所有的F。禾谷镰刀菌分离物是15-乙酰脱氧雪腐镰刀菌烯醇化学型。致病性试验表明，F. Asiaticum能侵染小麦和水稻的穗部。FHB严重度和抗真菌毒素分析表明，F。在小麦中，NIV型的asiaticum菌株的致病力低于3ADON型，而在水稻中，NIV型的asiaticum菌株的致病力高于3ADON型。F.具有不同化学型的asiaticum分离物在菌丝生长、产孢、分生孢子大小或子囊壳产量方面没有显示出显著差异。本研究结果可为我国制定控制该病的管理策略提供参考。
Members of Fusarium graminearum species complex (FGSC) are the major pathogens that cause Fusarium head blight (FHB) in cereals worldwide. Symptoms of FHB on rice, including dark staining or browning of rice glumes, were recently observed in Jiangsu Province, China. To improve our understanding of the pathogens involved, 201 FGSC isolates were obtained from freshly harvested rice samples and identified by phylogenetic analyses. Among the 201 FGSC isolates, 196 were F. asiaticum and the remaining 5 were F. graminearum. Trichothecene chemotype and chemical analyses showed that 68.4% of the F. asiaticum isolates were the 3-acetyldeoxynivalenol (3ADON) chemotype and the remainder were the nivalenol (NIV) chemotype. All of the F. graminearum isolates were the 15-acetyldeoxynivalenol chemotype. Pathogenicity assays showed that both the 3ADON and NIV chemotypes of F. asiaticum could infect wheat and rice spikes. FHB severity and trichothecene toxin analysis revealed that F. asiaticum with the NIV chemotype was less aggressive than that with the 3ADON chemotype in wheat, while the NIV-producing strains were more virulent than the 3ADON-producing strains in rice. F. asiaticum isolates with different chemotypes did not show significant differences in mycelial growth, sporulation, conidial dimensions, or perithecial production. These findings would provide useful information for developing management strategies for the control of FHB in China.