Date Received: 26-02-2025
Date Published: 21-03-2025
##submissions.doi##: https://doi.org/10.1234/gdwbea62
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Induced Resistance Potential of Penicillium citrinum CTND-2405 against anthracnose disease on basil (Ocimum basilicum L.)
Keywords
Biological control, induced resistance, basil, Penicillium citrinum
Abstract
Rhizosphere fungi are known for their ability to antagonize plant pathogens, promote growth, and induce disease resistance in plants. This study aimed to evaluate the potential of Penicillium citrinum CTND-2405, isolated from rhizospheric soil, in inducing resistance on basil (Ocimum basilicum L.) against anthracnose caused by Colletotrichum sp. Basil seeds were soaked for 4 hours in either a spore suspension of P. citrinum (106 cfu/ml) or sterile water, with or without artificial inoculation of Colletotrichum sp. Polyphenolic accumulation and fluorescence responses in leaf tissues were observed under a fluorescence microscope. In greenhouse experiments, five treatments were tested: seed soaking with P. citrinum spores, soaking in sterile water, additional spore applications at 3, 6, 9 days post-planting, and chemical fungicide applications. Results showed that seed soaking with P. citrinum followed by pathogen inoculation triggered earlier and stronger polyphenolic accumulation and fluorescence responses. Combining seed soaking with spore applications further reduced anthracnose incidence and severity, and disease control efficiency up to 59.92% compared with the control treatment.
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