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NAC transcription factor family members are differentially expressed in rice seedlings in response to Rice Tungro Spherical Virus

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Research Paper 01/03/2017
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NAC transcription factor family members are differentially expressed in rice seedlings in response to Rice Tungro Spherical Virus

A. M. Sharoni, M. Nuruzzaman, M. M. Rahman, A. K. M. R. Islam, MM. Hossain, M. F. Alam, F. M. A. Haydar, M. A. Rahman, S. Kikuchi
Int. J. Biosci.10( 3), 15-23, March 2017.
Certificate: IJB 2017 [Generate Certificate]
Key: Differential gene expressionNAC transcription factorRTSV

Abstract

The NAC genes encode plant-specific transcriptional factors known to play diverse roles in various plant developmental processes. Rice cultivar Taichung Native 1 (TN1) is susceptible to rice tungro spherical virus (RTSV). Backcross line TW16 was developed by TN1 and RTSV-resistant cultivar UtriMerah. Propagation of RTSV is supported in TN1 but not in TW16, although both TN1 and TW16 remain asymptomatic. Here, we compared the gene expression profiles of TN1 and TW16 infected by RTSV to identify the OsNAC gene expression patterns associated with the accumulation and suppression of RTSV. Among 112OsNAC genes examined by a microarray, approximately 31% and 55% of them were found differentially expressed by RTSV in TN1 and TW16, respectively. Four NAC genes showed continuously expression in TW16 at all days post-inoculation (dpi). Six NAC genes showed higher expression in the TW16 than the TN1 at different dpi with RTSV. Most of the genes in subgroups ONAC2 (50%), ONAC3 (56%), and ONAC7 (80%) were more highly activated in TW16 than in TN1 after RTSV infection. These results suggested that OsNAC genes might be related to the responses induced by the RTSV infection. Whereas, a number of genes in the NAC subgroups NAC1 and were ONAC1 down-regulated for RTSV infection. These OsNAC genes might be associated to the health stage maintenance of the host plants, which may help to clarify the function of these key genes in network pathways.

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