Altered expression of the <i><scp>PTR</scp>/<scp>NRT</scp>1</i> homologue <i>Os<scp>PTR</scp>9</i> affects nitrogen utilization efficiency, growth and grain yield in rice

Fang, Zhongming; Xia, Kuaifei; Xin, Yang; Grotemeyer, Marianne Suter; Meier, Stefan; Rentsch, Doris; Xu, Xinlan; Zhang, Mingyong

doi:10.1111/pbi.12031

Cited by 141 publications

(119 citation statements)

References 66 publications

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“…Increases in NUE have been obtained, but modifying the expression of main transporters or enzymes of N assimilation has not often resulted in the expected success. Among the positive examples are the overexpression of OsAMT1;1 and OsNPF7.3 in rice [69,70] resulting in increased growth and grain yield. This lack of rapid breakthroughs might be explained by the strong regulatory network controlling N assimilation and by close links to other pathways, as exemplified by the increase in NUE achieved by overexpressing sugar transporters (AtSTP13 (Sugar transporter 13), AtSWEET16 [71,72]) or the TF AtDOF1 (DNA-binding with-onefinger 1) [73], all of which act on the link between C and N metabolism.…”

Section: Feedback Regulation Of N Assimilation By Amino Acidsmentioning

confidence: 98%

Plant nitrogen assimilation and its regulation: a complex puzzle with missing pieces

Krapp

2015

Current Opinion in Plant Biology

382

238

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Section: Feedback Regulation Of N Assimilation By Amino Acidsmentioning

confidence: 98%

Plant nitrogen assimilation and its regulation: a complex puzzle with missing pieces

Krapp

2015

Current Opinion in Plant Biology

382

238

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“…Many attempts have been made to use the overexpression of N transporter genes to improve NUE and grain yields (Fang et al, 2013;Chen et al, 2016;Fan et al, 2016). All such efforts have required consideration of the influence of N in delaying maturation times.…”

Section: Discussionmentioning

confidence: 99%

Expression of the Nitrate Transporter Gene OsNRT1.1A/OsNPF6.3 Confers High Yield and Early Maturation in Rice

et al. 2018

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Nitrogen (N) is a major driving force for crop yield improvement, but application of high levels of N delays flowering, prolonging maturation and thus increasing the risk of yield losses. Therefore, traits that enable utilization of high levels of N without delaying maturation will be highly desirable for crop breeding. Here, we show that OsNRT1.1A (OsNPF6.3), a member of the rice (Oryza sativa) nitrate transporter 1/peptide transporter family, is involved in regulating N utilization and flowering, providing a target to produce high yield and early maturation simultaneously. OsNRT.1A has functionally diverged from previously reported NRT1.1 genes in plants and functions in upregulating the expression of N utilization-related genes not only for nitrate but also for ammonium, as well as flowering-related genes. Relative to the wild type, osnrt1.1a mutants exhibited reduced N utilization and late flowering. By contrast, overexpression of OsNRT1.1A in rice greatly improved N utilization and grain yield, and maturation time was also significantly shortened. These effects were further confirmed in different rice backgrounds and also in Arabidopsis thaliana. Our study paves a path for the use of a single gene to dramatically increase yield and shorten maturation time for crops, outcomes that promise to substantially increase world food security.

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“…OsNPF8.9, mainly expressed in root epidermis and hairs, has been cloned contribution to N uptake [30]. The role of OsNPF4.1 (SP1) has been demonstrated to function in rice panicle elongation [31] and OsNPF8.20 (OsPTR9) function in ammonium uptake, promotion of lateral root formation, and increased grain yield [32]. However, their substrates are still unknown.…”

Section: Nitrogen Acquisitionmentioning

confidence: 99%

Nitrogen Use Efficiency in Rice

Huang¹,

Zhao²,

Zhang³

et al. 2018

Nitrogen in Agriculture - Updates

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Food security is a major global issue because of the growing population and decreasing land area. Rice (Oryza sativa L.) is the most important staple cereal crop in the world. Application of nitrogen (N) fertilizer has improved crop yield in the world during the past five decades but with considerable negative impacts on the environment. New solutions are therefore urgently needed to simultaneously increase yields while maintaining or preferably decreasing applied N to maximize the nitrogen use efficiency (NUE) of crops. Plant NUE is inherently complex with each step (including N uptake, translocation, assimilation, and remobilization) governed by multiple interacting genetic and environmental factors. Based on the current knowledge, we propose some possible approaches enhancing NUE, by molecular manipulation selecting candidate genes and agricultural integrated management practices for NUE improvement. Developing an integrated research program combining approaches, mainly based on whole-plant physiology, quantitative genetics, forward and reverse genetics, and agronomy approaches to improve NUE, is a major objective in the future.

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

Cited by 141 publications

References 66 publications

Plant nitrogen assimilation and its regulation: a complex puzzle with missing pieces

Plant nitrogen assimilation and its regulation: a complex puzzle with missing pieces

Expression of the Nitrate Transporter Gene OsNRT1.1A/OsNPF6.3 Confers High Yield and Early Maturation in Rice

Nitrogen Use Efficiency in Rice

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