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Fumigation by bacterial volatile 2, 5-dimethylpyrazine enhances anthracnose resistance and shelf life of mango

Abstract

Anthracnose is a serious postharvest disease of mango causing significant loss in quality during ripening, storage, and trade. In the present study, we evaluated the preventive and curative effects of volatile organic compounds (VOCs) emitted by Pseudomonas putida BP25 and its synthetic VOC 2, 5-dimethylpyrazine on anthracnose in mango cv. Chausa. The preventive fumigation of fruits showed lower anthracnose severity (18.44%) than curative treatment (49.20%). Interestingly, the fumigation treatment significantly (p < 0.05) maintained fruit quality parameters such as firmness, total soluble solids, and titratable acidity. The volatile fumigated fruits showed higher bioactive content (total carotenoids, total phenolics, and total flavonoids content) and lower physiological activity (respiration and ethylene rate) than untreated fruits. The shelf life evaluation revealed an extension of storage periods for nine days. The non-invasive chlorophyll fluorescence technique further confirmed positive quality changes in the volatile fumigated fruits. Results show the potential of the bacterial-volatile blend and the synthetic 2, 5-dimethylpyrazine for increasing fruit resistance to anthracnose and extending the shelf life in mango.

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Acknowledgements

We are thankful to the Post Graduate School, Division of Food Science and Postharvest Technology, and Division of Plant Pathology, ICAR-Indian Agricultural Research Institute, New Delhi-110012 for providing research facilities for conducting various experiments.

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Contributions

RG and AK designed and planned the experiment. ATJ carried out the experimental work. EV carried out the data analysis. AK and ATJ drafted the manuscript, further corrected and improved by CK, AK, and RG. SK helped with the resource. All authors have read the manuscript and approved the same for publication.

Corresponding authors

Correspondence to Aundy Kumar, Charanjit Kaur or Robin Gogoi.

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The authors declare no conflict of interest.

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Janamatti, A.T., Kumar, A., Kaur, C. et al. Fumigation by bacterial volatile 2, 5-dimethylpyrazine enhances anthracnose resistance and shelf life of mango. Eur J Plant Pathol 164, 209–227 (2022). https://doi.org/10.1007/s10658-022-02551-5

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  • DOI: https://doi.org/10.1007/s10658-022-02551-5

Keywords

  • Chlorophyll fluorescence
  • Pyrazine
  • Mango
  • Postharvest quality
  • Pseudomonas putida BP25
  • Volatiles