Scholarlink

<p>Fusarium wilt (c.o. <i>Fusarium oxysporum</i> f. sp. <i>capsici</i> (<i>Foc</i>) is one of the major disasters during chilli production, which causes tremendous yield losses under suitable climatic conditions worldwide. One of our research aims was to investigate the incidence of Fusarium wilt disease, with a special reference to the climatic conditions in various chilli growing areas of Punjab, Pakistan, in 2020–2022. For these purposes, three major chilli growing areas were surveyed. All the investigated climatic factors, such as air and soil temperature, relative humidity, rainfall, wind speed, and soil moisture, positively correlated with disease development. The highest disease incidence was recorded in District Lahore (69%), followed by a disease incidence of 31.8% in Chiniot and 16% in Kasur. In our study, two years’ screening (2020-21 and 2021-22) of thirty different chilli varieties/advanced lines was carried out to find out the source of resistance against Fusarium wilt. Among them, only two varieties (Sayban and HP-1810 F1) showed resistance responses, but six varieties (Maxi, PR-0921, BS Hari Rani, FS-1, Janbaz-F1, and Sitara 80) were highly susceptible to Fusarium wilt of chilli. For the disease management with biocontrol agents (BCAs), <i>Bacillus subtilis</i> (MU_Bs09) was found the most effective in inhibiting pathogen mycelial growth (82.68%) and reducing disease incidence (75.88%) under both lab and greenhouse experiments, followed by <i>Streptomyces palmae</i> (MU_Sp19) and <i>Pseudomonas simiae</i> (MU_Ps13). Also, treatment with <i>Bacillus subtilis</i> (MU_Bs09) significantly enhanced the production of some biochemical enzymes and compounds, including catalases, phenolics, H₂O₂, and chlorophyll. In addition, <i>Bacillus subtilis</i> (MU_Bs09) improved the plant morphological attributes, such as fresh weight, dry weight, plant height, and yield per plant when treated at three different concentrations. The related enhancements were followed by <i>Streptomyces palmae</i> (MU_Sp19) and <i>Pseudomonas simiae</i> (MU_Ps13). In conclusion, cultivating resistant plant varieties is one of the most effective strategies to combat Fusarium wilt. In addition, applying soil drenching with beneficial microbes, such as <i>Bacillus subtilis</i> strain MU_Bs09, can be one effective strategy for managing Fusarium wilt through enhancing plant antioxidant activity and other constitutive defense mechanisms.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Bacterial biological control agents and resistance resources to enhance defense and morphological attributes of Capsicum annuum against Fusarium wilt

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年3月20日

查看全文
  • Muhammad Usman,
  • Muhammad Atiq,
  • Nasir Ahmed Rajput,
  • Muhammad Sagheer,
  • Ye Xia

摘要

Fusarium wilt (c.o. Fusarium oxysporum f. sp. capsici (Foc) is one of the major disasters during chilli production, which causes tremendous yield losses under suitable climatic conditions worldwide. One of our research aims was to investigate the incidence of Fusarium wilt disease, with a special reference to the climatic conditions in various chilli growing areas of Punjab, Pakistan, in 2020–2022. For these purposes, three major chilli growing areas were surveyed. All the investigated climatic factors, such as air and soil temperature, relative humidity, rainfall, wind speed, and soil moisture, positively correlated with disease development. The highest disease incidence was recorded in District Lahore (69%), followed by a disease incidence of 31.8% in Chiniot and 16% in Kasur. In our study, two years’ screening (2020-21 and 2021-22) of thirty different chilli varieties/advanced lines was carried out to find out the source of resistance against Fusarium wilt. Among them, only two varieties (Sayban and HP-1810 F1) showed resistance responses, but six varieties (Maxi, PR-0921, BS Hari Rani, FS-1, Janbaz-F1, and Sitara 80) were highly susceptible to Fusarium wilt of chilli. For the disease management with biocontrol agents (BCAs), Bacillus subtilis (MU_Bs09) was found the most effective in inhibiting pathogen mycelial growth (82.68%) and reducing disease incidence (75.88%) under both lab and greenhouse experiments, followed by Streptomyces palmae (MU_Sp19) and Pseudomonas simiae (MU_Ps13). Also, treatment with Bacillus subtilis (MU_Bs09) significantly enhanced the production of some biochemical enzymes and compounds, including catalases, phenolics, H₂O₂, and chlorophyll. In addition, Bacillus subtilis (MU_Bs09) improved the plant morphological attributes, such as fresh weight, dry weight, plant height, and yield per plant when treated at three different concentrations. The related enhancements were followed by Streptomyces palmae (MU_Sp19) and Pseudomonas simiae (MU_Ps13). In conclusion, cultivating resistant plant varieties is one of the most effective strategies to combat Fusarium wilt. In addition, applying soil drenching with beneficial microbes, such as Bacillus subtilis strain MU_Bs09, can be one effective strategy for managing Fusarium wilt through enhancing plant antioxidant activity and other constitutive defense mechanisms.