石河子市区大花金鸡菊白粉病病原鉴定及发病规律

doi:10.6048/j.issn.1001-4330.2019.11.013

新疆农业科学 ›› 2019, Vol. 56 ›› Issue (11): 2072-2078.DOI: 10.6048/j.issn.1001-4330.2019.11.013

• 土壤肥料·林业·贮藏加工·植物保护·畜牧·农业经济 • 上一篇下一篇

石河子市区大花金鸡菊白粉病病原鉴定及发病规律

海艳, 李妍, 方治豪, 王凯涛, 任毓忠

石河子大学农学院/新疆绿洲农业病虫害治理与植保资源利用自治区高校重点实验室,新疆石河子 832003

收稿日期:2019-07-08 出版日期:2019-11-20 发布日期:2019-12-09
作者简介:海艳(1997-),女,新疆人,本科,研究方向为植物病害防控,(E-mail)961464218@qq.com
基金资助:
国家自然科学基金(31160357);兵团林业局项目(KC009903);石河子大学大学生创新创业训练计划(SRP2018026)

Pathogen Identification and Occurrence Regularity of Powdery Mildew of Coreopsis grandiflora in Shihezi

HAI Yan, LI Yan, FANG Zhi-hao, WANG Kai-tao, REN Yu-zhong

College of Agronomy,Shihezi University/ Key Laboratory for Oasis Agricultural Pest Management and Plant Resource Utilization at Universities Level of Xinjiang Uygur Autonomous Region,Shihezi Xinjiang 832003,China

Received:2019-07-08 Published:2019-11-20 Online:2019-12-09
Supported by:
Supported by the National Natural Science Foundation of China (31160357); The Project of Forestry Bureau of XPCC (KC009903); Undergraduate Innovation and Entrepreneurship Training Program of Shihezi University (SRP2018026)

摘要/Abstract

摘要： 【目的】研究新疆石河子地区大花金鸡菊白粉病的病原种类,逐步摸清其发病规律。【方法】采用显微形态观察结合分子生物学方法对其病原进行鉴定,并系统调查病害的季节流行动态。【结果】金鸡菊白粉病菌分生孢子大小为24.4~34.2 μm×14.6~22.0 μm,以2~4个分生孢子串生在分生孢子梗上,闭囊壳球形,直径平均为115.1 μm,闭囊壳内单子囊,子囊椭圆形、无色且有柄,大小为68.3~131.7 μm×56.1~80.5 μm,子囊内8个子囊孢子,大小为14.6~26.8 μm×12.2~21.7 μm,附属丝菌丝状。根据病原菌的rDNA-ITS序列(563 bp)建立发育树,其与Podosphaera fusca (登录号KM225763、 JX546297、 KR049083和 MF476989)聚在1个进化支上,且序列同源性99.0%以上。【结论】棕丝单囊壳(Podosphaera fusca)为石河子市区大花金鸡菊白粉病的病原菌,且该病害在石河子地区4月中上旬始发,6月中下旬达到发病高峰期,7月初开始进入衰退期。

关键词: 大花金鸡菊; 白粉病; 病原鉴定; 棕丝单囊壳属

Abstract: 【Objective】 To identify the pathogenic species and explore dynamic epidemic of Coreopsis grandiflora powdery mildew in Shihezi area. 【Method】 Morphological and molecular approaches were adopted to identify the pathogen of Coreopsis grandiflora powdery mildew, and dynamic of disease epidemic was systematically surveyed. 【Result】 The results showed that the conidiophores were up-right and producing 2-4 conidia in chains. Conidia were 24.4-34.2 μm×14.6-22.0 μm, Chasmothecia were dark brown, spherical, 115.1( 96.3-139.0)μm in diameter. Chasmothecium contained one asci with eight ascospores. Asci were sessile, broadly ellipsoid-ovoid to subglobose,68.3-131.7 μm×56.1-80.5 μm. Ascospores were 14.6-26.8 μm×12.2-21.7 μm. Appendages were mycelioid. The internal transcribed spacer (ITS) region of rDNA of the fungus was amplified and sequenced. The resultant 563 BP sequence was produced. A GenBank BLAST search of the China and Korea isolates showed above 99.0% similarity with Podosphaera fusca (Accession numbers are: KM225763, JX546297, KR049083 and MF476989) . 【Conclusion 】 Therefore, the pathogen causing powdery mildew of Coreopsis grandiflora was identified as Podosphaera fusca. The disease began in the middle of April, reached its peak in late June, and began to decline in early July in Shihezi of Xinjiang.

Key words: Coreopsis grandiflora; powdery mildew; pathogen; Podosphaera fusca

中图分类号:

S436.8

海艳, 李妍, 方治豪, 王凯涛, 任毓忠. 石河子市区大花金鸡菊白粉病病原鉴定及发病规律[J]. 新疆农业科学, 2019, 56(11): 2072-2078.

HAI Yan, LI Yan, FANG Zhi-hao, WANG Kai-tao, REN Yu-zhong. Pathogen Identification and Occurrence Regularity of Powdery Mildew of Coreopsis grandiflora in Shihezi[J]. Xinjiang Agricultural Sciences, 2019, 56(11): 2072-2078.

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石河子市区大花金鸡菊白粉病病原鉴定及发病规律

Pathogen Identification and Occurrence Regularity of Powdery Mildew of Coreopsis grandiflora in Shihezi

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