Write ‘systemic small RNAs’: read ‘systemic immunity’
Alireza Seifi
+ Author Affiliations
- Author Affiliations
Wageningen UR Plant Breeding, Wageningen University and Research Center, PO Box 386, 6700 AJ Wageningen, The Netherlands. Email: arseifi@yahoo.com
Functional Plant Biology 38(10) 747-752 https://doi.org/10.1071/FP11100
Submitted: 24 April 2011 Accepted: 28 June 2011 Published: 16 September 2011
Abstract
About 50 years ago, it was reported that pathogen-infected plants are less susceptible to a broad spectrum of the subsequent pathogen attacks. This form of induced resistance, which resembles the immunisation in mammalian cells, is called systemic acquired resistance (SAR). In the last 10 years, plant molecular biology has been revolutionised by the discovery of RNA silencing, which is also a systemic phenomenon and also contributes to plant immunity. Here, I review these two systemic phenomena in a comparative way to highlight the possibility that systemic silencing contributes to systemic immunity. This potential contribution could be in the process of gene expression reprogramming, which is needed for SAR induction, and/or in SAR signal complex, and/or in establishing SAR in remote tissues and forming priming status.
Additional keywords: gene silencing, plant defense mechanisms, plant–microbe interactions, systemic acquired resistance (SAR), systemic silencing, mobile small RNAs.
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