Molecular Regulatory Networks for Improving Nitrogen Use Efficiency in Rice

Hou, Mingxiao; Yu, Minli; Li, Zhiqiang; Ai, Zhiyuan; Chen, Jingguang G.

doi:10.3390/ijms22169040

Cited by 27 publications

(16 citation statements)

References 130 publications

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“…In the CK pathway, the expression of OsLOGL5 and OsLOGL10 increased upon treatment with 1.5 mm Lys + 0.5 mm Arg + 1 μm melatonin, whereas that of OsCKX4 was only induced upon treatment with 10 μm melatonin compared to other treatments ( Figure 5D ). Previous reports suggest that both OsLOGL5 ( Hou et al, 2021a ) and OsCKX4 ( Wang et al, 2022a ) regulate the elongation of axillary buds in rice.…”

Section: Resultsmentioning

confidence: 99%

Melatonin Mediates Axillary Bud Outgrowth by Improving Nitrogen Assimilation and Transport in Rice

2022

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Melatonin plays an important role in plant resistance to biotic and abiotic stresses. However, whether melatonin is involved in the regulation of plant architecture, such as the formation of axillary bud outgrowth or tillering, in rice remains unknown. Here, we found that different concentrations of melatonin influenced axillary bud outgrowth in rice, and moderate melatonin concentrations also alleviated the inhibition of axillary bud outgrowth in the presence of high concentrations of basic amino acids lysine and arginine. Furthermore, transcriptome analysis demonstrated that genes involved in nitrogen metabolism and phytohormone signal transduction pathways may affect axillary bud outgrowth, which is regulated by melatonin. We determined that the differentially expressed genes glutamine synthetase OsGS2 and amino acid transporter OsAAP14, which are involved in nitrogen metabolism and are regulated by melatonin and basic amino acids, were the key regulators of axillary bud outgrowth in rice. In addition, we validated the functions of OsGS2 and OsAAP14 using rice transgenic plants with altered axillary bud outgrowth and tillers. Taken together, these results suggest that melatonin mediates axillary bud outgrowth by improving nitrogen assimilation and transport in rice.

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Section: Resultsmentioning

confidence: 99%

Melatonin Mediates Axillary Bud Outgrowth by Improving Nitrogen Assimilation and Transport in Rice

2022

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“…In response to changes in the light environment, it has been documented that ELONGATED HYPCOTYL 5 ( HY5 ) translocates from the shoot to the root through the phloem and stimulates NRT2.1 expression [ 69 ]. CKs may play a role in controlling global nutrient acquisition, while others ( CEPD / CEPDL and HY5 ) may play more specialized roles in regulating nitrate uptake [ 70 ].…”

Section: Cytokinin (Ck) Modulates Rsa In Response To Nitrogen Stressmentioning

confidence: 99%

Insights on Phytohormonal Crosstalk in Plant Response to Nitrogen Stress: A Focus on Plant Root Growth and Development

Ahmad

Jiang

Zhang

et al. 2023

IJMS

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Nitrogen (N) is a vital mineral component that can restrict the growth and development of plants if supplied inappropriately. In order to benefit their growth and development, plants have complex physiological and structural responses to changes in their nitrogen supply. As higher plants have multiple organs with varying functions and nutritional requirements, they coordinate their responses at the whole-plant level based on local and long-distance signaling pathways. It has been suggested that phytohormones are signaling substances in such pathways. The nitrogen signaling pathway is closely associated with phytohormones such as auxin (AUX), abscisic acid (ABA), cytokinins (CKs), ethylene (ETH), brassinosteroid (BR), strigolactones (SLs), jasmonic acid (JA), and salicylic acid (SA). Recent research has shed light on how nitrogen and phytohormones interact to modulate physiology and morphology. This review provides a summary of the research on how phytohormone signaling affects root system architecture (RSA) in response to nitrogen availability. Overall, this review contributes to identifying recent developments in the interaction between phytohormones and N, as well as serving as a foundation for further study.

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“…NUE has important environmental and economic implications for global food security, and research to understand NUE is important if we are to maintain high yield and high protein quality with low N input 54 . Several genes/QTLs affecting rice NUE, including NRT1.1B, OsTCP19, GRF4 and NGR5, have been cloned 55 . Superior alleles of these genes/QTLs offer potential to achieve high stable rice yields with low N application.…”

Section: Potential Use Of Thp9-t For Genetic Improvementmentioning

confidence: 99%

THP9 enhances seed protein content and nitrogen-use efficiency in maize

Huang

Wang

Zhu

et al. 2022

Nature

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The maize (Zea mays ssp. mays) wild ancestor, teosinte, has three times the seed protein content of most modern inbreds and hybrids, but the mechanisms responsible for this trait are unknown. We created a contiguous haplotype DNA sequence of a teosinte, Zea mays ssp. Parviglumis, with Trio-Binning, and map-based cloned a major high-protein QTL, teosinte high protein 9 (Thp9) on chromosome 9. Thp9 encodes an asparagine synthetase 4 that is highly expressed in teosinte, but not in the B73 inbred, where a deletion in the 10 th intron of Thp9-B73 causes incorrect splicing of Thp9-B73 transcripts. Transgenic expression of Thp9-teosinte in B73 significantly increased seed protein content. Introgression of Thp9-teosinte into modern maize inbreds and hybrids greatly enhanced free amino acid accumulation, especially asparagine, throughout the plant, increasing seed protein content without affecting yield. Thp9-teosinte appears to increase nitrogen utilization efficiency, important for promoting a high yield under low nitrogen conditions.

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Molecular Regulatory Networks for Improving Nitrogen Use Efficiency in Rice

Cited by 27 publications

References 130 publications

Melatonin Mediates Axillary Bud Outgrowth by Improving Nitrogen Assimilation and Transport in Rice

Melatonin Mediates Axillary Bud Outgrowth by Improving Nitrogen Assimilation and Transport in Rice

Insights on Phytohormonal Crosstalk in Plant Response to Nitrogen Stress: A Focus on Plant Root Growth and Development

THP9 enhances seed protein content and nitrogen-use efficiency in maize

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