Related to ABI3/VP1-Like 1(RAVL1) regulates brassinosteroid-mediated activation ofAMT1;2in rice (Oryza sativa)

Xuan, Yuan; Duan, Fengying; Je, Byoung Il; Kim, Chul Min; Li, Tianya; Liu, Jing Miao; Park, Soon Ju; Cho, Jun Hyeon; Kim, Tae Ho; Wirén, Nicolaus von; Han, Chang‐deok

doi:10.1093/jxb/erw442

Cited by 17 publications

(21 citation statements)

References 35 publications

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“…13). This failure may be due to additional, non-redundant functions of BSK proteins and of BRs in the transcriptional regulation of N transporters 24,25 . However, significant correlations were found between BR sensitivity, as determined by root length inhibition or hypocotyl elongation, and the responsiveness of primary root or average lateral root length to mild N deficiency (Fig.…”

Section: Resultsmentioning

confidence: 99%

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Natural variation of BSK3 tunes brassinosteroid signaling to regulate root foraging under low nitrogen

et al. 2019

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Developmental plasticity of root system architecture is crucial for plant performance in nutrient-poor soils. Roots of plants grown under mild nitrogen (N) deficiency show a foraging response characterized by increased root length but mechanisms underlying this developmental plasticity are still elusive. By employing natural variation in Arabidopsis accessions, we show that the brassinosteroid (BR) signaling kinase BSK3 modulates root elongation under mild N deficiency. In particular, a proline to leucine substitution in the predicted kinase domain of BSK3 enhances BR sensitivity and signaling to increase the extent of root elongation. We further show that low N specifically upregulates transcript levels of the BR co-receptor BAK1 to activate BR signaling and stimulate root elongation. Altogether, our results uncover a role of BR signaling in root elongation under low N. The BSK3 alleles identified here provide targets for improving root growth of crops growing under limited N conditions.

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Section: Resultsmentioning

confidence: 99%

“…BRs regulate several physiological and developmental processes in plants. These plant steroid hormones have also been implicated in the transcriptional regulation of N uptake 24,25 . Regarding root growth, BRs modulate the elongation of differentiated cells 43 and the size of meristems 23,44,45 .…”

Section: Discussionmentioning

confidence: 99%

Natural variation of BSK3 tunes brassinosteroid signaling to regulate root foraging under low nitrogen

et al. 2019

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“…Indeed, the protein delta(24)-sterol reductase (Q39085), involved in the conversion of the early BR precursor 24-methylenecholesterol to campesterol, also showed increased abundance in ammonium nutrition ( Table 2 and Figure 2 ). Interestingly, BRs have been recently related to the regulation of the AMT1-type ammonium transport proteins in Arabidopsis and rice [ 53 , 54 ]. In rice, BRs induce the gene expression of OsAMT1;1 and OsAMT1;2 ammonium transporters [ 54 ].…”

Section: Resultsmentioning

confidence: 99%

New Insights on Arabidopsis thaliana Root Adaption to Ammonium Nutrition by the Use of a Quantitative Proteomic Approach

Coleto

Vega‐Mas

Glauser

et al. 2019

IJMS

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Nitrogen is an essential element for plant nutrition. Nitrate and ammonium are the two major inorganic nitrogen forms available for plant growth. Plant preference for one or the other form depends on the interplay between plant genetic background and environmental variables. Ammonium-based fertilization has been shown less environmentally harmful compared to nitrate fertilization, because of reducing, among others, nitrate leaching and nitrous oxide emissions. However, ammonium nutrition may become a stressful situation for a wide range of plant species when the ion is present at high concentrations. Although studied for long time, there is still an important lack of knowledge to explain plant tolerance or sensitivity towards ammonium nutrition. In this context, we performed a comparative proteomic study in roots of Arabidopsis thaliana plants grown under exclusive ammonium or nitrate supply. We identified and quantified 68 proteins with differential abundance between both conditions. These proteins revealed new potential important players on root response to ammonium nutrition, such as H+-consuming metabolic pathways to regulate pH homeostasis and specific secondary metabolic pathways like brassinosteroid and glucosinolate biosynthetic pathways.

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“…Transcriptome studies in Arabidopsis and rice revealed that AMT genes are up‐regulated by brassinosteroids (BRs) (Yu et al ., ), and that activation of OsAMT1;2 involves Related to ABI3/VP1 (Abscisic Acid‐Insensitive 3/Viviparous 1)‐Like 1 (RAVL1) downstream of the BR‐receptor BRI1 (Brassinosteroid Insensitive 1) (Xuan et al ., ). In addition, the Indeterminate Domain 10 (IDD10) and DNA‐Binding With One Finger (DOF18) transcription factors induce AMT transporter expression in rice, and thus modulate ammonium uptake (Xuan et al ., ; Wu et al ., ).…”

Section: Regulation Of Nitrogen Transportmentioning

confidence: 97%

Source and sink mechanisms of nitrogen transport and use

2017

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Contents Summary35I.Introduction35II.Nitrogen acquisition and assimilation36III.Root‐to‐shoot transport of nitrogen38IV.Nitrogen storage pools in vegetative tissues39V.Nitrogen transport from source leaf to sink40VI.Nitrogen import into sinks42VII.Relationship between source and sink nitrogen transport processes and metabolism43VIII.Regulation of nitrogen transport43IX.Strategies for crop improvement44X.Conclusions46Acknowledgements47References47 Summary Nitrogen is an essential nutrient for plant growth. World‐wide, large quantities of nitrogenous fertilizer are applied to ensure maximum crop productivity. However, nitrogen fertilizer application is expensive and negatively affects the environment, and subsequently human health. A strategy to address this problem is the development of crops that are efficient in acquiring and using nitrogen and that can achieve high seed yields with reduced nitrogen input. This review integrates the current knowledge regarding inorganic and organic nitrogen management at the whole‐plant level, spanning from nitrogen uptake to remobilization and utilization in source and sink organs. Plant partitioning and transient storage of inorganic and organic nitrogen forms are evaluated, as is how they affect nitrogen availability, metabolism and mobilization. Essential functions of nitrogen transporters in source and sink organs and their importance in regulating nitrogen movement in support of metabolism, and vegetative and reproductive growth are assessed. Finally, we discuss recent advances in plant engineering, demonstrating that nitrogen transporters are effective targets to improve crop productivity and nitrogen use efficiency. While inorganic and organic nitrogen transporters were examined separately in these studies, they provide valuable clues about how to successfully combine approaches for future crop engineering.

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Related to ABI3/VP1-Like 1(RAVL1) regulates brassinosteroid-mediated activation ofAMT1;2in rice (Oryza sativa)

Cited by 17 publications

References 35 publications

Natural variation of BSK3 tunes brassinosteroid signaling to regulate root foraging under low nitrogen

Natural variation of BSK3 tunes brassinosteroid signaling to regulate root foraging under low nitrogen

New Insights on Arabidopsis thaliana Root Adaption to Ammonium Nutrition by the Use of a Quantitative Proteomic Approach

Source and sink mechanisms of nitrogen transport and use

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