Proteomics of Durum Wheat Grain during Transition to Conservation Agriculture.
Nitrogen management in combination with sustainable agronomic techniques can have a great impact on the wheat grain proteome influencing its technological quality. In this study, proteomic analyses were used to document changes in the proportion of prolamins in mature grains of the newly released Italian durum wheat cv Achille. Such an approach was applied to wheat fertilized with urea (UREA) and calcium nitrate (NITRATE), during the transition to no-till Conservation Agriculture (CA) practice in a Mediterranean environment. Results obtained in a two-years field experiment study suggest low molecular weight glutenins (LMW-GS) as the fraction particularly inducible regardless of the N-form. Quantitative analyses of LMW-GS by 2D-GE followed by protein identification by LC-ESI-MS/MS showed that the stable increase was principally due to C-type LMW-GS. The highest accumulation resulted from a physiologically healthier state of plants treated with UREA and NITRATE. Proteomic analysis on the total protein fraction during the active phase of grain filling was also performed. For both N treatments, but at different extent, an up-regulation of different classes of proteins was observed: i) enzymes involved in glycolysis and citric acid cycles which contribute to an enhanced source of energy and carbohydrates, ii) stress proteins like heat shock proteins (HSPs) and antioxidant enzymes, such as peroxidases and superoxide dismutase which protect the grain from abiotic stress during starch and storage protein synthesis. In conclusion N inputs, which combined rate with N form gave high yield and improved quality traits in the selected durum wheat cultivar. The specific up-regulation of some HSPs, antioxidant enzymes and defense proteins in the early stages of grain development and physiological indicators related to fitness traits, could be useful bio-indicators, for wheat genotype screening under more sustainable agronomic conditions, like transition phase to no-till CA in Mediterranean environments.
Department of Life Sciences, University of Parma, Parma, Italy.
Giovanna
http://orcid.org/0000-0001-9712-3223
G
Visioli
Faculty of Bioscience and Technologies for Food, Agriculture and Environment, University of Teramo, Teramo, Italy.
Angelica
A
Galieni
Faculty of Bioscience and Technologies for Food, Agriculture and Environment, University of Teramo, Teramo, Italy.
Fabio
F
Stagnari
Department of Life Sciences, University of Parma, Parma, Italy.
Urbana
U
Bonas
Faculty of Bioscience and Technologies for Food, Agriculture and Environment, University of Teramo, Teramo, Italy.
Stefano
S
Speca
Interdepartmental Measure Centre "Giuseppe Casnati," University of Parma, Parma, Italy.
Andrea
A
Faccini
Faculty of Bioscience and Technologies for Food, Agriculture and Environment, University of Teramo, Teramo, Italy.
Michele
M
Pisante
Department of Life Sciences, University of Parma, Parma, Italy.|Regione Emilia-Romagna SITEIA, PARMA Technopole, Parma, Italy.
Nelson
N
Marmiroli
D000383:Agriculture; D002523:Edible Grain / Q000378:metabolism*; D015180:Electrophoresis, Gel, Two-Dimensional; D010940:Plant Proteins / Q000378:metabolism*; D020543:Proteome / Q000032:analysis*; D040901:Proteomics / Q000379:methods*; D021241:Spectrometry, Mass, Electrospray Ionization; D053719:Tandem Mass Spectrometry; D014908:Triticum / Q000378:metabolism*
D010940:Plant Proteins; D020543:Proteome