Plant anti-aging: delayed flower and leaf senescence in Erinus alpinus treated with cell-free Chlorella cultivation medium

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Title
Plant anti-aging: delayed flower and leaf senescence in Erinus alpinus treated with cell-free Chlorella cultivation medium
Author(s)
Sang-Moo Lee; B Lee; C K Shim; Y K Chang; Choong-Min Ryu
Bibliographic Citation
Plant Signaling & Behavior, vol. 15, no. 6, pp. e1763005-e1763005
Publication Year
2020
Abstract
Plant tissues naturally senesce over time. Attempts to improve plant robustness and increase longevity have involved genetic modification, application of synthetic chemicals, and use of beneficial microbes. Recently, culture supernatant from a microalga Chlorella fusca was found to prime innate immunity against Pseudomonas syringae in Arabidopsis thaliana. However, the capacity of Chlorella culture supernatants to prevent or delay aging in higher plants has not been elucidated. In this study, roots of the ornamental flowering plant Erinus alpinus L. were drenched with cell-free supernatants from three Chlorella species. Flower and leaf senescence in E. alpinus was significantly reduced and delayed with all three Chlorella supernatants. Investigations of the mode of action underlying delayed senescence showed that the Chlorella supernatants did not act as a chemical trigger to elicit plant immunity or as a growth-promoting fertilizer in E. alpinus. The mechanisms underlying the anti-aging effects remain undetermined, and several possible hypotheses are discussed. Several Chlorella species are industrially cultivated, and disposal of cell-free supernatant can be economically and environmentally challenging. This study provides a novel method for extending plant lifespan through use of Chlorella supernatant and discusses the potential of using industrial waste supernatants in agriculture and horticulture to reduce reliance on chemical pesticides and genetic modification.
Keyword
Chlorella supernatantErinus alpinus Lornamental flowering plantPGPRplant anti-agingplant senescence
ISSN
1559-2316
Publisher
T&F (Taylor & Francis)
DOI
http://dx.doi.org/10.1080/15592324.2020.1763005
Type
Article
Appears in Collections:
Division of Research on National Challenges > Infectious Disease Research Center > 1. Journal Articles
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