第一个报告的第一份报告
Sevket Olmez1, Nedim Mutlu2, Adem Kaba3
1GAP Agricultural Research Institute, Şanlıurfa, Turkey; sevketolmez@yahoo.com.
Plant disease
|June 5, 2023
概括
在土耳其的棉花田中发现了一种新的真菌病 - - Alternaria alternata叶病,它造成了大量的植物损害和潜在的产量损失. 这标志着该病原体在该地区影响棉花的首次报告.
科学领域:
- 植物病理学 植物病理学
- 菌类学 菌类学是指菌类学.
- 农业科学 农业科学
背景情况:
- 棉花 (Gossypium hirsutum L.) 是一个重要的作物,桑利乌尔法是土耳其的主要生产枢纽.
- 在2021-2022年,在棉花田中观察到不寻常的中后季干燥和脱叶.
- 症状包括带有紫色光环的死角病变,进展到影响茎和,导致过早脱叶.
研究的目的:
- 确定在土耳其观察到的棉花病的致病原体.
- 为了确认分离的真菌的致病性.
- 提供土耳其棉花上这种特定病原体的第一份报告.
主要方法:
- 在使用菌素的土豆配糖 (PDA) 上,从受感染的棉花叶中分离真菌.
- 在光显微镜下分离的真菌的形态特征.
- 在温室条件下对健康的棉花植物进行致病性测试.
- 使用ITS和ATPase区域的DNA测序进行分子确认.
主要成果:
- 菌分离物形成了深橄绿色的殖民地,并产生了与Alternaria物种相一致的特征性状体.
- 病原性测试成功地在接种的棉花植物上重现了疾病症状.
- 分子分析证实了病原体是Alternaria alternata,与参考菌株具有高核酸相同性.
- 在受影响的区域中确定了二次宿主Prosopis farcta.
结论:
- Alternaria alternata被确定为土耳其棉花叶病的致病原体.
- 该病原体有可能导致大量的收获损失,在恶劣条件下估计高达30%.
- 这是土耳其首次记录出 Alternaria alternata 导致棉花叶病的病例.
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