PDF(Pubmed)
Abstract：
The need for the increasing geographical spread of fire blight (FB) affecting fruit crops to be addressed led to large-scale chemicalization of the environmental matrices and reduction of plant productivity. The current study aimed to assess the effects of novel biopreparations at different exposure durations on photosynthetic pigment content and antioxidant enzyme activity in leaves of apple and pear varieties with varying levels of resistance to FB. Biopreparations were formulated from a cultural broth containing Lacticaseibacillus paracasei M12 or Bacillus amyloliquefaciens MB40 isolated from apple trees\' phyllosphere. Aseptic leaves from blight-resistant (endemic Malus sieversii cv. KG10), moderately resistant (Pyrus pyraster cv. Wild), and susceptible (endangered Malus domestica cv. Aport and Pyrus communis cv. Shygys) varieties were employed. The impact of biopreparations on fruit crop antioxidant systems and photosynthetic apparatuses was investigated in vitro. Study results indicated that FB-resistant varieties exhibit enhanced adaptability and oxidative stress resistance compared to susceptible ones. Plant response to biopreparations varied based on the plant\'s initial FB sensitivity and exposure duration. Indeed, biopreparations improved the adaptive response of the assimilation apparatus, protein synthesis, and catalase and superoxide dismutase activity in susceptible varieties, suggesting that biopreparations have the potential for future commercialization to manage FB in fruit crops.
摘要：
需要解决影响水果作物的火疫病（FB）的地理传播增加的需求，导致环境基质的大规模化学化和植物生产力的降低。本研究旨在评估不同暴露时间的新型生物制剂对不同抗性水平的苹果和梨品种叶片光合色素含量和抗氧化酶活性的影响。生物修复是从苹果树叶球中分离的含有副干酪乳杆菌M12或解淀粉芽孢杆菌MB40的培养肉汤中配制的。来自抗枯萎病的无菌叶(特有的马蹄莲cv。KG10),中等抗性(Pyruspyrastercv。Wild),和易感(濒临灭绝的驯鹿简历。Aport和Pyruscommuniscv。采用Shygys）品种。在体外研究了生物分离对水果作物抗氧化系统和光合装置的影响。研究结果表明，与易感品种相比，抗FB品种表现出增强的适应性和抗氧化应激能力。植物对生物修复的反应根据植物的初始FB敏感性和暴露持续时间而变化。的确,生物修复改善了同化装置的适应性反应，蛋白质合成，以及易感品种的过氧化氢酶和超氧化物歧化酶活性，这表明生物修复有可能在未来商业化管理水果作物中的FB。
