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Review
. 2020 Feb;36(1):1-10.
doi: 10.5423/PPJ.RW.12.2019.0295. Epub 2020 Feb 1.

Salicylic Acid as a Safe Plant Protector and Growth Regulator

Young Mo Koo  1 , A Yeong Heo  1 , Hyong Woo Choi  1
Affiliations

Affiliation

  • 1 Department of Plant Medicals, Andong National University, Andong 36729, Korea.
Review

Salicylic Acid as a Safe Plant Protector and Growth Regulator

Young Mo Koo et al. Plant Pathol J. 2020 Feb.
. 2020 Feb;36(1):1-10.
doi: 10.5423/PPJ.RW.12.2019.0295. Epub 2020 Feb 1.

Authors

Young Mo Koo  1 , A Yeong Heo  1 , Hyong Woo Choi  1

Affiliation

  • 1 Department of Plant Medicals, Andong National University, Andong 36729, Korea.

Abstract

Since salicylic acid (SA) was discovered as an elicitor of tobacco plants inducing the resistance against Tobacco mosaic virus (TMV) in 1979, increasing reports suggest that SA indeed is a key plant hormone regulating plant immunity. In addition, recent studies indicate that SA can regulate many different responses, such as tolerance to abiotic stress, plant growth and development, and soil microbiome. In this review, we focused on the recent findings on SA's effects on resistance to biotic stresses in different plant-pathogen systems, tolerance to different abiotic stresses in different plants, plant growth and development, and soil microbiome. This allows us to discuss about the safe and practical use of SA as a plant defense activator and growth regulator. Crosstalk of SA with different plant hormones, such as abscisic acid, ethylene, jasmonic acid, and auxin in different stress and developmental conditions were also discussed.

Keywords: abiotic stress tolerance; resistance; salicylic acid; susceptibility.

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Figures

Fig. 1

Fig. 1

Enhanced resistance of cucumber plants…

Fig. 1

Enhanced resistance of cucumber plants against powdery mildew disease by exogenous salicylic acid…

Fig. 1
Enhanced resistance of cucumber plants against powdery mildew disease by exogenous salicylic acid (SA) treatment. (A, B) Powdery mildew disease symptom developed 7 days after inoculation. Before the pathogen inoculation, cucumber plants were sprayed with steriled tap water (A) or 1 mM SA (B). (C–F) Disease control effect of SA. (C, D) Cucumber leaves developing powdery mildew disease symptoms before the SA treatment. (E, F) Disease progression was observed 7 days after spray with steriled tap water (E) or 1 mM SA (F). SA effectively suppressed new infection (B) and disease progression (F) in cucumber plants.
See this image and copyright information in PMC

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