College of Horticulture, Hainan University, Haikou, 570228, People's Republic of China.
Arch Microbiol. 2021 Sep;203(7):4033-4040. doi: 10.1007/s00203-021-02378-4. Epub 2021 May 26.
Pitaya fruit canker is an important disease in pitaya production. Facilitating resistance through the application of biological control principles is a promising alternative to traditional control strategies. This study evaluated the induced resistance of Penicillium rolfsii, numbered Y17 isolated from papaya leaves in pitaya fruit, and evaluated the activity of the defense enzymes, total antioxidant capacity (T-AOC), and malondialdehyde (MDA) content of the treated fruit. The results demonstrate that treatment with Y17 effectively induced resistance of pitaya fruit to canker disease caused by Neoscytalidium dimidiatum, with an inhibition rate of 70.87%. In addition, Y17 notably improved the activities of peroxidase, catalase, and polyphenol oxidase as well as the T-AOC of the treated samples. Y17 treatment reduced the MDA content in these fruits. Taken together, our results suggest that Y17 treatment could trigger pitaya fruit defense responses and effectively induce resistance to fruit canker disease.
火龙果溃疡病是火龙果生产中的重要病害。通过应用生物防治原理来促进抗性是替代传统防治策略的一种有前途的方法。本研究评估了从火龙果叶片中分离出的编号为 Y17 的青霉对火龙果果实的诱导抗性，并评估了处理果实的防御酶、总抗氧化能力（T-AOC）和丙二醛（MDA）含量的活性。结果表明，Y17 处理可有效诱导火龙果对由 Neoscytalidium dimidiatum 引起的溃疡病的抗性，抑制率为 70.87%。此外，Y17 显著提高了处理样品中过氧化物酶、过氧化氢酶和多酚氧化酶的活性以及 T-AOC。Y17 处理降低了这些果实中的 MDA 含量。综上所述，我们的结果表明，Y17 处理可以触发火龙果果实的防御反应，并有效诱导对果实溃疡病的抗性。
