Nitrate in 2020: Thirty Years from Transport to Signaling Networks

Vidal, Elena A.; Álvarez, José M.; Araus, Viviana; Riveras, Eleodoro; Brooks, Matthew D.; Krouk, Gabriel; Ruffel, Sandrine; Lejay, Laurence; Crawford, Nigel M.; Coruzzi, Gloria M.; Gutiérrez, Rodrigo A.

doi:10.1105/tpc.19.00748

Cited by 258 publications

(231 citation statements)

References 265 publications

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“…2). The role of NR activity in lateral root development is poorly explored, but genomic approaches have recognized NR as essential for root development (Zhang and Forde 1998;Wang et al 2004;Vidal et al 2020). Based on these data and on our present results, we speculated that a possible correlation exists between NR activity and LR development.…”

Section: Discussionsupporting

confidence: 56%

Abscisic acid-nitric oxide and auxin interaction modulates salt stress response in tomato roots

Santos

Zandonadi

Sá

et al. 2020

Theor. Exp. Plant Physiol.

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Integrated signaling network involving abscisic acid (ABA), nitric oxide (NO), and indoleacetic acid (IAA) controls root morphogenesis during salt stress by a mechanism still poorly understood. The present data unveiled an ABA-NO-IAA interaction underlying radicular morphological responses to salinity. Three Solanum lycopersicum genotypes were analyzed: wild type, ABA-insensitive mutant (sitiens), and auxin-responsive (DR5::GUS) plants. Nitric oxide fluorescence, nitrate reductase activity, auxin signaling, and some molecular analyses were performed. Pharmacological inhibitors and NO donor sodium nitroprusside were also used to evaluate NaCl-induced root morphological responses. Sodium nitroprusside inhibited primary root length, increased lateral root emergence, and rescued salt inhibited lateral root growth. The results showed that NO integrates the ABA-IAA signaling network of root system responses under salt stress, involving: (a) ABA and molybdenum-dependent enzymes as responsible for saltinduced NO production; (b) modulations of the plasma membrane H ?-ATPase coupling and isoforms differential expression; and (c) ABA-mediated and NOdependent antioxidative enzymes activities.

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Section: Discussionsupporting

confidence: 56%

Abscisic acid-nitric oxide and auxin interaction modulates salt stress response in tomato roots

Santos

Zandonadi

Sá

et al. 2020

Theor. Exp. Plant Physiol.

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“…Nitrate acted as a signal regulating substance rather than a nutrient that reduced the level of dormancy. During seed development and germination, nitrate induced the transcription of CYP707A2 gene and then affected seed dormancy [43,44]. In our study, KNO 3 also promoted seed germination to some extent, although it was not significant.…”

Section: Plant Growth Regulators Regulation On Plant Seed Germinationcontrasting

confidence: 56%

Practical Methods for Breaking Seed Dormancy in a Wild Ornamental Tulip Species Tulipa thianschanica Regel

Wei

Zhao

et al. 2020

Agronomy

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The innate physiological dormancy of Tulipa thianschanica seeds ensures its survival and regeneration in the natural environment. However, the low percentage of germination restricts the establishment of its population and commercial breeding. To develop effective ways to break dormancy and improve germination, some important factors of seed germination of T. thianschanica were tested, including temperature, gibberellin (GA3) and/or kinetin (KT), cold stratification and sowing depth. The percentage of germination was as high as 80.7% at a constant temperature of 4 °C, followed by 55.6% at a fluctuating temperature of 4/16 °C, and almost no seeds germinated at 16 °C, 20 °C and 16/20 °C. Treatment with exogenous GA3 significantly improved the germination of seeds, but KT had a slight effect on the germination of T. thianschanica seeds. The combined treatment of GA3 and KT was more effective at enhancing seed germination than any individual treatment, and the optimal hormone concentration for the germination of T. thianschanica seeds was 100 mg/L GA3 + 10 mg/L KT. In addition, it took at least 20 days of cold stratification to break the seed dormancy of T. thianschanica. The emergence of T. thianschanica seedlings was the highest with 82.4% at a sowing depth of 1.5 cm, and it decreased significantly at a depth of >3.0 cm. This study provides information on methods to break dormancy and promote the germination of T. thianschanica seeds.

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“…Improvements in N utilization can be enhanced through an improved nitrogen transport, assimilation, and remobilization [ 4 ]. Therefore, deciphering the molecular basis of the natural variation for sensing and responding to N availability has great potential to design crop varieties which can ensure a healthy balance between the crop yield and environmental consequences [ 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Comparative Transcriptomics of Rice Genotypes with Contrasting Responses to Nitrogen Stress Reveals Genes Influencing Nitrogen Uptake through the Regulation of Root Architecture

Subudhi

Garcia

Coronejo

et al. 2020

IJMS

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The indiscriminate use of nitrogenous fertilizers continues unabated for commercial crop production, resulting in air and water pollution. The development of rice varieties with enhanced nitrogen use efficiency (NUE) will require a thorough understanding of the molecular basis of a plant’s response to low nitrogen (N) availability. The global expression profiles of root tissues collected from low and high N treatments at different time points in two rice genotypes, Pokkali and Bengal, with contrasting responses to N stress and contrasting root architectures were examined. Overall, the number of differentially expressed genes (DEGs) in Pokkali (indica) was higher than in Bengal (japonica) during low N and early N recovery treatments. Most low N DEGs in both genotypes were downregulated whereas early N recovery DEGs were upregulated. Of these, 148 Pokkali-specific DEGs might contribute to Pokkali’s advantage under N stress. These DEGs included transcription factors and transporters and were involved in stress responses, growth and development, regulation, and metabolism. Many DEGs are co-localized with quantitative trait loci (QTL) related to root growth and development, chlorate-resistance, and NUE. Our findings suggest that the superior growth performance of Pokkali under low N conditions could be due to the genetic differences in a diverse set of genes influencing N uptake through the regulation of root architecture.

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Nitrate in 2020: Thirty Years from Transport to Signaling Networks

Cited by 258 publications

References 265 publications

Abscisic acid-nitric oxide and auxin interaction modulates salt stress response in tomato roots

Abscisic acid-nitric oxide and auxin interaction modulates salt stress response in tomato roots

Practical Methods for Breaking Seed Dormancy in a Wild Ornamental Tulip Species Tulipa thianschanica Regel

Comparative Transcriptomics of Rice Genotypes with Contrasting Responses to Nitrogen Stress Reveals Genes Influencing Nitrogen Uptake through the Regulation of Root Architecture

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