Altered expression of the PTR/NRT1 homologue OsPTR9 affects nitrogen utilization efficiency, growth and grain yield in rice

Fang, Zhongming; Xia, Kuaifei; Yang, Xin; Suter, Marianne; Meier, Stefan; Rentsch, Doris; Xu, Xinlan; Zhang, Mingyong (2013). Altered expression of the PTR/NRT1 homologue OsPTR9 affects nitrogen utilization efficiency, growth and grain yield in rice. Plant Biotechnology Journal, 11(4), pp. 446-458. Oxford: Wiley 10.1111/pbi.12031

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The plant PTR/NRT1 (peptide transporter/nitrate transporter 1) gene family comprises di/tripeptide and low-affinity nitrate transporters; some members also recognize other substrates such as carboxylates, phytohormones (auxin and abscisic acid), or defence compounds (glucosinolates). Little is known about the members of this gene family in rice (Oryza sativa L.). Here, we report the influence of altered OsPTR9 expression on nitrogen utilization efficiency, growth, and grain yield. OsPTR9 expression is regulated by exogenous nitrogen and by the day-night cycle. Elevated expression of OsPTR9 in transgenic rice plants resulted in enhanced ammonium uptake, promotion of lateral root formation and increased grain yield. On the other hand, down-regulation of OsPTR9 in a T-DNA insertion line (osptr9) and in OsPTR9-RNAi rice plants had the opposite effect. These results suggest that OsPTR9 might hold potential for improving nitrogen utilization efficiency and grain yield in rice breeding.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Molecular Plant Physiology

UniBE Contributor:

Suter, Marianne; Meier, Stefan and Rentsch, Doris

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

1467-7644

Publisher:

Wiley

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

04 Dec 2013 17:20

Last Modified:

10 Jul 2015 15:37

Publisher DOI:

10.1111/pbi.12031

Uncontrolled Keywords:

peptide; nitrate; transporter; OsPTR9; rice; grain yield

BORIS DOI:

10.7892/boris.38691

URI:

https://boris.unibe.ch/id/eprint/38691

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