Genetic analysis of rootstock-mediated nitrogen (N) uptake and root-to-shoot signalling at contrasting N availabilities in tomato
| Autor: | Alfonso Albacete, M. J. Asins, Cristina Martínez-Andújar, J. A. Dieleman, Ian C. Dodd, Emilio A. Carbonell, Francisco Pérez-Alfocea |
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| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
0301 basic medicine QTL analysis Cytokinins Genotype Nitrogen Quantitative Trait Loci Population SNP Cyclopentanes Plant Science Biology Plant Roots 01 natural sciences Candidate genes 03 medical and health sciences chemistry.chemical_compound Solanum lycopersicum Plant Growth Regulators Dry weight Xylem Genetics Oxylipins education education.field_of_study Jasmonic acid fungi food and beverages Salicylic acid General Medicine WUR GTB Teelt & Bedrijfssystemen PE&RC biology.organism_classification Gibberellins Solanum pimpinellifolium Plant Leaves 030104 developmental biology Gene interactions chemistry Agronomy Shoot Salicylic Acid Rootstock Agronomy and Crop Science Plant Shoots 010606 plant biology & botany |
| Zdroj: | Plant Science, 263, 94-106 Plant Science 263 (2017) |
| ISSN: | 0168-9452 |
| DOI: | 10.1016/j.plantsci.2017.06.012 |
| Popis: | Selecting rootstocks for high nitrogen acquisition ability may allow decreased N fertilizer application without reducing tomato yields, minimizing environmental nitrate pollution. A commercial hybrid tomato variety was grafted on a genotyped population of 130 recombinant inbred lines (RILs) derived from Solanum pimpinellifolium, and compared with self- and non-grafted controls under contrasting nitrate availabilities (13.8 vs 1.0 mM) in the nutrient solution. Grafting itself altered xylem sap composition under N-sufficient conditions, particularly Na+ (8.75-fold increase) concentration. N deprivation decreased shoot dry weight by 72.7% across the grafted RIL population, and one RIL rootstock allowed higher total leaf N content than the best of controls, suggesting more effective N uptake. Sixty-two significant QTLs were detected by multiple QTL mapping procedure for leaf N concentration (LNC), vegetative growth, and the xylem sap concentrations of Mn and four phytohormone groups (cytokinins, gibberellins, salicylic acid and jasmonic acid). Only three LNC QTLs could be common between nitrogen treatments. Clustering of rootstock QTLs controlling LNC, leaf dry weight and xylem sap salicylic acid concentration in chromosome 9 suggests a genetic relationship between this rootstock phytohormone and N uptake efficiency. Some functional candidate genes found within 2 Mbp intervals of LNC and hormone QTLs are discussed. |
| Databáze: | OpenAIRE |
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