Salicylic acid: transport and long-distance immune signaling

Pradeep Kachroo; Huazhen Liu; Aardra Kachroo

doi:10.1016/j.coviro.2020.05.008

Salicylic acid: transport and long-distance immune signaling

Research output: Contribution to journal › Review article › peer-review

66 Scopus citations

Abstract

The small phenolic compound salicylic acid (SA) is a phytohormone that regulates many biological processes, although it is most well-known for its role in plant defense. SA is an important regulator of systemic acquired resistance (SAR), a type of systemic immunity that protects uninfected parts of the plant against secondary infections by a broad spectrum of pathogens. SAR involves the generation of mobile signal(s) at the primary infection site, which translocate to distal uninfected portions and activate systemic disease resistance. Although, SA was considered to not constitute the mobile SAR signal, it is preferentially transported from pathogen-infected to uninfected parts via the apoplast. Further investigations have revealed that distal transport of SA is indeed essential for SAR. The apoplastic SA transport is regulated by the transpirational pull and partitioning of SA between the symplast and cuticle.

Original language	English
Pages (from-to)	53-57
Number of pages	5
Journal	Current Opinion in Virology
Volume	42
DOIs	https://doi.org/10.1016/j.coviro.2020.05.008
State	Published - Jun 2020

Bibliographical note

Publisher Copyright:
© 2020 Elsevier B.V.

Funding

We apologize to colleagues whose work was not cited due to space limitations. Work in our laboratories is supported by grants from National Science Foundation ( MCB#0421914 , IOS#051909 ), Kentucky Soybean Board and USDA National Institute of Food and Agriculture (Hatch project 1014539 ).

Funders	Funder number
Kentucky Soybean Promotion Board
National Science Foundation Arctic Social Science Program	0421914, 051909
US Department of Agriculture National Institute of Food and Agriculture, Agriculture and Food Research Initiative	1014539

ASJC Scopus subject areas

Virology

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10.1016/j.coviro.2020.05.008

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title = "Salicylic acid: transport and long-distance immune signaling",

abstract = "The small phenolic compound salicylic acid (SA) is a phytohormone that regulates many biological processes, although it is most well-known for its role in plant defense. SA is an important regulator of systemic acquired resistance (SAR), a type of systemic immunity that protects uninfected parts of the plant against secondary infections by a broad spectrum of pathogens. SAR involves the generation of mobile signal(s) at the primary infection site, which translocate to distal uninfected portions and activate systemic disease resistance. Although, SA was considered to not constitute the mobile SAR signal, it is preferentially transported from pathogen-infected to uninfected parts via the apoplast. Further investigations have revealed that distal transport of SA is indeed essential for SAR. The apoplastic SA transport is regulated by the transpirational pull and partitioning of SA between the symplast and cuticle.",

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AU - Kachroo, Pradeep

AU - Liu, Huazhen

AU - Kachroo, Aardra

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Y1 - 2020/6

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AB - The small phenolic compound salicylic acid (SA) is a phytohormone that regulates many biological processes, although it is most well-known for its role in plant defense. SA is an important regulator of systemic acquired resistance (SAR), a type of systemic immunity that protects uninfected parts of the plant against secondary infections by a broad spectrum of pathogens. SAR involves the generation of mobile signal(s) at the primary infection site, which translocate to distal uninfected portions and activate systemic disease resistance. Although, SA was considered to not constitute the mobile SAR signal, it is preferentially transported from pathogen-infected to uninfected parts via the apoplast. Further investigations have revealed that distal transport of SA is indeed essential for SAR. The apoplastic SA transport is regulated by the transpirational pull and partitioning of SA between the symplast and cuticle.

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JO - Current Opinion in Virology

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ER -

Salicylic acid: transport and long-distance immune signaling

Abstract

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