您好，欢迎访问中国热带农业科学院 机构知识库！
中国热带农业科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Effect of SHAM on the activity of coumoxystrobin against Phytophthora litchii

文献类型： 外文期刊

作者： Jing, Suyue 1 ; Zhu, Fadi 2 ; Wen, Xiaodong 2 ; Zhang, Jing 2 ; Feng, Gang 2 ;

作者机构： 1.Hainan Univ, Sch Trop Agr & Forestry, Haikou 570228, Peoples R China

2.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Haikou 571101, Peoples R China

3.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Key Lab Integrated Pest Management Trop Crops, Minist Agr & Rural Affairs, Haikou 571101, Peoples R China

关键词： Litchi downy blight; Inhibition effect; Developmental stages; Oxygen consumption

期刊名称：TROPICAL PLANT PATHOLOGY （ 影响因子：1.5； 五年影响因子：1.9 ）

ISSN： 1983-2052

年卷期： 2024 年

页码：

收录情况： SCI

摘要： Litchi downy blight, caused by Phytophthora litchii, presents significant challenges to litchi production, storage, and transportation. Previous studies have shown that coumoxystrobin exhibits effective inhibitory activity against P. litchii. Salicylhydroxamic acid (SHAM), an alternative respiratory pathway inhibitor, is commonly used to evaluate the efficacy of cytochrome respiratory pathway inhibitor like coumoxystrobin against fungal phytopathogens in vitro. In this study, the toxicity of SHAM on various developmental stages of P. litchii, including mycelial growth, sporangial germination, zoospore release, and cystospore germination, was assessed. The EC50 values for SHAM were determined as 166.72, 150.69, 333.97, and 240.91 mu g/mL, respectively. Subsequently, the activity of coumoxystrobin against P. litchii was assessed in the presence of SHAM at a concentration of 50 mu g/mL, which showed slight inhibition below 20% for all four developmental stages. The addition of SHAM significantly improved the inhibitory activity of coumoxystrobin against P. litchii at different stages, with reductions in EC50 values ranging from 7.55- to 122.92-fold. Moreover, respiration assays revealed that a concentration of 5 mu g/mL coumoxystrobin inhibited P. litchii mycelial respiration to a lesser extent compared to the combined effect of coumoxystrobin and SHAM. SHAM also enhanced the control efficacy of coumoxystrobin against phytophthora blight development on litchi leaves. Previously, we reported that coumoxystrobin effectively controls postharvest downy mildew on litchi fruit. Consequently, coumoxystrobin holds promise as an agent for litchi downy blight control in the field and after harvest. Furthermore, similar to previous studies, SHAM, an alternative oxidase (AOX) inhibitor, was found to significantly enhance the activity of the two aforementioned QoI fungicides against P. litchii, both in vitro and in vivo. This suggests that further exploration of AOX inhibitors and the role of AOX in plant diseases could contribute to the rational use of QoI fungicides and improve control efficiency for plant diseases.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：中国热带农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台