Nitrogen Deficiency Induced Alterations in the Root Proteome of a Pair of Potato (Solanum tuberosum L.) Varieties Contrasting for their Response to Low N

• Published in: Proteomics (Weinheim) Vol. 17; no. 23-24
• Main Authors: Jozefowicz, Anna Maria, Hartmann, Anja, Matros, Andrea, Schum, Annegret, Mock, Hans‐Peter
• Format: Journal Article
• Language: English
• Published: Germany Wiley Subscription Services, Inc 01.12.2017
• Subjects: Amino acids; Catabolism; Cultivars; Cultivation; Deprivation; Gluconeogenesis; Glutamate-ammonia ligase; Glutamine; Glycolysis; in vitro; label‐free LC‐MS; Machinery and equipment; mass spectrometry; Metabolic pathways; metabolic pathways nitrogen use efficiency; Nitrogen; Potatoes; Protein biosynthesis; Proteins; Proteomics; Tricarboxylic acid cycle; metabolic pathways nitrogen use efficiency; mass spectrometry; label-free LC-MS; in vitro
• ISSN: 1615-9853; 1615-9861; 1615-9861
• DOI: 10.1002/pmic.201700231

Improving crop nitrogen use efficiency is important both from the economic and the environmental viewpoint. Here, the aim is to highlight differences between the proteomic response of the roots of two potato cultivars contrasting in their response to nitrogen (N) deficiency, in an effort to understand which proteins and metabolic pathways contribute to the tolerance of N deprivation. The two cultivars ‘‘Topas’’ (tolerant) and ‘‘Lambada’’ (sensitive) are grown under both an N sufficient and an N deficient regime, using an in vitro‐based cultivation system. Responsive proteins are identified and quantified using label‐free quantitative shotgun proteomics. The contrasting cultivars differed with respect to components of the glutamine synthetase/glutamine oxoglutarate aminotransferase pathway, tricarboxylic acid cycle, the glycolysis/gluconeogenesis pathway as well as protein and amino acid synthesis machinery. Additional differences are associated with protein catabolism and defense mechanisms.