Institute of Biosciences and Bioresources

National Research Council of Italy

Maurizio Chiurazzi

Role: Senior Researcher
Section: Researchers and Technologists
Division: Naples
Tel: (39) 081-6132433-081-6132434
E-mail: maurizio.chiurazzi@ibbr.cnr.it


Date of birth: June 22 1960

Place of birth: Naples, Italy

Nationality: Italian

Marital Status: Married

Home address: Via Ventaglieri 77, Napoli, Italy


1991 - Institution: University of Naples Federico II

Degree: PhD in Molecular and Cellular Genetic

Title of dissertation: Transcriptional regulation of Rhizobium leguminosarum genes involved in

nitrogen metabolism. Advisor: Prof. M. Iaccarino

1986 - Institution: University of Naples Federico II

Degree: Laurea in Biological Sciences

Title of dissertation: Transcriptional regulation of the prereplicative genes of the bacteriophage T4; roles of the genes comC and comJ. Advisor: Prof. J. F. Pulitzer


From January 2014: Senior Scientist at the Institute of Biosciences and Bioresources, Naples, Italy

From January 2014: Member of the Scientific Board of the Italian Society of Plant Biology, SIBV

From October 2010: Member of the Scientific Board of the PhD program in Applied Biology, University of Naples, Federico II

December 2001-December 2013: Senior Scientist at the Institute of Genetics and Biophysics A. Buzzati Traverso, Naples, Italy

March 2001-December 2001: Researcher 2nd level at the Institute of Genetics and Biophysics A. Buzzati Traverso, Naples, Italy

January 1999-March 2001: Researcher ART. 36 1th comma at the International Institute of Genetics and Biophysics, Naples, Italy

November 1993-November 1998: Researcher ART. 36 2nd comma at the International Institute of

Genetics and Biophysics, Naples, Italy

May 1993-January 1994: Postdoctoral Associate at the Massachusetts Institute of Technology, MA, USA. Supervisor: prof. E. Signer

June 1992-May 1993: Post-doc fellow at the Massachusetts Institute of Technology, MA, USA, with a CNR-NATO fellowship. Supervisor: prof. E. Signer

June 1991-June 1992: Post-doc fellow (CNR fellowship) at the Massachusetts Institute of Technology, MA, USA, with a CNR fellowship. Supervisor: prof. E. Signer

July 1989-October 1989: Fellow at the N.F.L. Unit, University of Sussex, U.K. with a F.E.M.S. fellowship. Supervisor: prof. M. Merrick

Research Interests

Plants are sessile organisms that evolved an amazing capacity to adapt their growth and developmental programs to the changes of the environmental conditions. Among mineral nutrients, nitrogen is often a limiting resource for plants and its efficient uptake and utilization is a critical function of the roots to couple morphological and physiological responses to nutrient availabilities within the exploitable soil volume. Furthermore, sizes and locations of plant-available N nutrients pools in soils are often highly variable as well as conditions for nutrient uptake. The external N signal can be perceived either through a systemic change of the plant nutritional status or the induction of a local signaling pathway. We mainly use the model legume Lotus japonicus as experimental system and we are currently investigating the overall response of the Lotus roots to different N sources concentrations and distribution. A transcriptomic analysis was performed to analyze the global profile of gene expression in different N conditions and to identify putative master regulators. The adaptative responses of the whole root architecture to N conditions include: primary root elongation, lateral roots formation and growth and Nitrogen Fixing Nodule organogenesis. We identified potential actors of the signaling pathways involved in these regulative responses and in particular we are focusing on the role played by ammonium and nitrate transporters in signalling and nutritional pathways.


1983-1986: Bacteriophage T4. Transcriptional regulation and putative antitermination mechanism.

1987-1991: Rhizobium-legume symbiosis. Regulation of nitrogen metabolism.

1991-1994: Arabidopsis thaliana and Agrobacterium tumefaciens. Homologous recombination in plant. Mechanisms of T-DNA integration.

1994-2003: Molecular Genetics of the Symbiotic Nitrogen Fixation in the model legume Lotus japonicus.

From 2003: Nitrogen metabolism in Lotus japonicus. Plant responses to nutritional stresses and modulation of the developmental programs.


D’apuzzo E, Valkov TV, Parlati A, Omrane S, Barbulova A, Sainz MM, Lentini M, Esposito S, Rogato A, Chiurazzi M* (2014) PII overexpression in Lotus japonicus affects nodule activity in permissive low nitrogen conditions and increases nodule numbers in high nitrogen treated plants. Molecular and Plant Microbe Interactions, DOI 10.1094/MPMI-09-14-0265-R

Cardi M, Castiglia D, Ferrara M, Guerriero G, Chiurazzi M, Esposito S (2014) The effects of salt stresscause a diversion of basal metabolism in barley roots: possible different roles for glucose-6-phosphate dehydrogenase isoforms. Plant Physiology and Biochemistry, DOI: 10.1016/J.PLAPHY.2014.11.001

Valkov TV, Chiurazzi M (2014) Nitrate transport and signaling. In Tabata S and Stougaard J (eds), The Lotus japonicus Genome, Compendium of Plant Genomes, DOI 10.1007/978-3-662-44270-8_12, Springer-Verlag Berlin Heidelberg, p. 125-136

Lèran S, Varala K, Boyer JC, Chiurazzi M, Crawford N, Daniel-Vedèle F, David L, Dickstein R, Fernandez E, Forde B, Gassmann W, Geiger D, Gojon A, Gong JM, Halkier BA, Harris JM, Hedrich R, Limami AM, Rentsch D, Seo M, Tsay YF, Zhang M, Coruzzi G, Lacombe B (2013) A unified nomenclature of Nitrate Transporter 1/Peptide transporter family members in plants. Trends in Plant Science, 19: 5-9.

Criscuolo G, Valkov TV, Parlati A, Alves ML, Chiurazzi M (2012) Molecular characterization of the Lotus japonicus NRT1/PTR NRT2 families. Plant Cell & Environment, 35: 1567-1581.

Calderon MG, Chiurazzi M, Espuny MR, Marquez AJ (2012) Photorespiratory metabolism and nodule function: behaviour of Lotus japonicus mutants deficient in plastid glutamine synthetase. Mol. Plant Microbe Int. 25: 211-219.

Rogato A, D’Apuzzo E, Chiurazzi M (2010) The multiple plant response to high ammonium conditions. The Lotus japonicus AMT1;3 protein acts as a putative transceptor. Plant Signaling and behavior. 5: 1584-1586.

Rogato A, D’Apuzzo E, Barbulova A, Omrane S, Parlati A, Carfagna S, Costa A, Lo Schiavo F, Esposito S, Chiurazzi M (2010) Characterization of a developmental root response caused by external ammonium supply in Lotus japonicus. Plant Physiology : 154: 784-795.

Omrane S, Chiurazzi M. (2009) A variety of regulatory mechanisms are involved in the nitrogen-dependent modulation of the nodule organogenesis program in legume roots. Plant Signaling and behavior 4: 1066-1068.

Omrane S, Ferrarini A, D’Apuzzo E, Rogato A, Delledonne M, Chiurazzi M. (2009) Symbiotic competence in Lotus japonicus is affected by plant nitrogen status: transcriptomic identification of genes affected by a new signalling pathway. New Phytologist 183: 380-394.


Selected Publications
(full list available at CNR People)

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