NDLI: The rice serine/threonine protein kinase OsPBL1 (ORYZA SATIVA ARABIDOPSIS PBS1-LIKE 1) is potentially involved in resistance to rice stripe disease

Content Provider	Springer Nature Link
Author	Lee, Kui Jae Kim, Kangmin
Copyright Year	2015
Abstract	Rice stripe disease is caused by the rice stripe virus (RSV) which is transmitted by the small brown plant hopper (SBPH). This disease significantly restricts rice productivity in East Asia. Major RSV resistance quantitative trait loci (QTLs) have been shown to be located on chromosome 11 in several resistant cultivars. However, the molecular identities of these QTLs are largely unknown. In this study, we identified the serine/threonine protein kinase OsPBL1 ( O RYZA S ATIVA ARABIDOPSIS PB S1-L IKE 1), a potential resistance gene to rice stripe disease, by reverse genetic screening with T-DNA insertional mutant lines. The OsPBL1 protein is highly conserved among various monocots and dicots, including Arabidopsis. Specifically, OsPBL1 exhibits 67 % amino acid sequence identity to AtPBS1 (AVRPPHB SUSCEPTIBLE1), a positive regulator of effector-triggered immunity (ETI) in Arabidopsis. Moreover, we show here that OsPBL1 transcripts are abundantly expressed in the leaves of Dongjin seedlings—an RSV-resistant—under normal growth conditions. Exogenous treatment with defense-related phytohormones such as cytokinin and salicylic acid increased the expression of OsPBL1. This gene is also modulated by the circadian rhythm. Furthermore, OsPBL1, OsPR1b, and OsPR2 transcripts were up-regulated to higher levels by SBPH treatment, which was specifically observed in RSV-resistant varieties. The OsPBL1 protein was found to localize to the nucleus and to be cleaved upon attack with either healthy or infected SBPHs. Taken together, our data indicate that OsPBL1 undergoes various transcriptional and post-translational modifications upon SBPH and/or RSV attack, similar to Arabidopsis PBS1. We propose that OsPBL1 is involved in antiviral defense signaling pathways in rice.
Starting Page	67
Ending Page	75
Page Count	9
File Format	PDF
ISSN	01676903
Journal	Plant Growth Regulation
Volume Number	77
Issue Number	1
e-ISSN	15735087
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-02-15
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Protein kinase Rice stripe disease Small brown plant hopper Viral resistance Plant Sciences Plant Anatomy/Development Plant Physiology Agriculture
Content Type	Text
Resource Type	Article
Subject	Physiology Plant Science Agronomy and Crop Science

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