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Updated: May 30, 2026

Plant Promoter Analysis: Identification and Characterization of Root Nodule Specific Promoter in the Common Bean
Published on: December 23, 2017
Multiple roles of nitrate transport accessory protein NAR2 in plants
Huimin Feng1, Xiaorong Fan, Xiaorong Fan
1State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, China.
Abstract:
Two component high affinity nitrate transport system, NAR2/NRT2, has been defined in several plant species. In Arabidopsis, AtNAR2.1 has a role in the targeting of AtNRT2.1 to the plasma membrane. The gene knock out mutant atnar2.1 lacks inducible high-affinity transport system (IHATS) activity, it also shows the same inhibition of lateral root (LR) initiation on the newly developed primary roots as the atnrt2.1 mutant in response to low nitrate supply. In rice, OsNAR2.1 interacts with OsNRT2.1, OsNRT2.2 and OsNRT2.3a to provide nitrate uptake over high and low concentration ranges. In rice roots OsNAR2.1 and its partner NRT2s show some expression differences in both tissue specificity and abundance. It can be predicted that NAR2 plays multiple roles in addition to being an IHATS component in plants.
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