References of "Delaplace, Pierre"
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See detailWheat root ecophysiology: understanding communication between wheat root system and soil microorganisms.
Delaplace, Pierre ULg; d'Ans, Séverine ULg; Wathelet, Jean-Paul ULg et al

Poster (2009)

Studies leading to a better understanding of the mechanisms involved in the communication between soil microorganisms and root system can potentially lead to improved fertility management strategies. Up ... [more ▼]

Studies leading to a better understanding of the mechanisms involved in the communication between soil microorganisms and root system can potentially lead to improved fertility management strategies. Up to now, the characterization of such interactions has been mainly focused on root exsudates but volatile organic compounds (VOC) also play a role as chemical messengers in positive interactions occurring in the rhizosphere. We aim to better understand the VOC-mediated chemical ecophysiology of soil. Wheat (Triticum aestivum L.) was chosen in this project based on its importance for food production and industrial applications. [less ▲]

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See detailevaluation of two protein extractions protocols for pichia anomala proteome analysis
Bajji, M.; Delaplace, Pierre ULg; Mauro, S. et al

Poster (2009)

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See detailChanges In Oxylipin Synthesis After Phytophthora Infestans Infection Of Potato Leaves Do Not Correlate With Resistance
Fauconnier, Marie-Laure ULg; Rojas-Beltran, J.; Dupuis, B. et al

in Plant Physiology and Biochemistry (2008), 46(8-9), 823-831

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See detailMethodes de mesure de l'age physiologique des tubercules semences de pomme de terre (Solanum tuberosum L.).
Delaplace, Pierre ULg; Fauconnier, Marie-Laure ULg; Du Jardin, Patrick ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2008), 12(2), 171-184

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See detailCoelogyne pulverula or Coelogyne tomentosa
Delaplace, Pierre ULg

in The Journal of the Orchid Society of Great Britain (2008), 57

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See detailOxylipin Profile And Antioxidant Status Of Potato Tubers During Extended Storage At Room Temperature
Delaplace, Pierre ULg; Rojas-Beltran, J.; Frettinger, P. et al

in Plant Physiology and Biochemistry (2008), 46(12), 1077-1084

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See detailPotato (Solanum Tuberosum L.) Tuber Physiological Age Index Is A Valid Reference Frame In Postharvest Ageing Studies
Delaplace, Pierre ULg; Brostaux, Yves ULg; Fauconnier, Marie-Laure ULg et al

in Postharvest Biology & Technology (2008), 50(1), 103-106

Essential yield components of potato crops are influenced by the physiological age of the tubers at planting. Previous studies have attempted to develop biophysical, physiological or biochemical markers ... [more ▼]

Essential yield components of potato crops are influenced by the physiological age of the tubers at planting. Previous studies have attempted to develop biophysical, physiological or biochemical markers of potato tuber ageing. This research note focuses on characterising a physiological age index (PAI) based on sprouting parameters and originally developed by Caldiz et al. [Caldiz, D.O., Fernandez, L.V., Struik, P.C., 2001. Physiological age index: a new, simple and reliable index to assess the physiological age of seed potato tubers based on the haulm killing date and length of the incubation period. Field Crop. Res. 69, 69–79]. The PAI progression of two cultivars (‘Bintje’ and ‘Désirée’) was measured and modelled over 2 harvest years. The preliminary results were consistent with other ageing markers such as the incubation period (IP) and desprouting sensitivity. Under our experimental conditions, the PAI allowed us to describe cultivar-specific and harvest year-specific age variations measured from the time the haulm (foliage) was killed and the mother plant's influence on the tubers was no longer present. By contrast, the IP data displayed a higher inherent variability that impaired their discrimination ability. Critical PAI values corresponding to the main postharvest developmental steps (e.g., dormancy, apical dominance, multiple sprouting) were then identified on the basis of emergence pattern data, allowing us to propose this index as a useful reference frame for future ageing studies. [less ▲]

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See detailThe role of oxylipins and antioxidants on off-flavor precursor formation during potato flake processing.
Gosset, Virginie; Göbel, Cornelia; Laine, Gaëlle et al

in Journal of Agricultural and Food Chemistry (2008), 56

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See detailCaractérisation physiologique et biochimique du processus de vieillissement du tubercule de pomme de terre (Solanum tuberosum L.)
Delaplace, Pierre ULg

Doctoral thesis (2007)

Potato seed tuber is considered as a model organ to study plant ageing. Besides, its physiological age greatly influences germination pattern and thus agronomical performance. In order to unravel the ... [more ▼]

Potato seed tuber is considered as a model organ to study plant ageing. Besides, its physiological age greatly influences germination pattern and thus agronomical performance. In order to unravel the biochemical processes underlying ageing, potato seed tubers (cv. Bintje and Désirée) were stored at 4°C for 7 months and regularly sampled to assess both physiological and biochemical parameters. Physiological age markers (PAI, incubation period) evolution was measured and allowed us to define a reference frame more accurate than the chronological age. A correlation has also been established with the growth parameters (number of stems, duration before emergence). In parallel, two biochemical approaches allowed us to assay proteome and antioxidant system modifications occurring during ageing. Protein pattern evolution was assessed by DIGE after hot SDS extraction. During ageing, 93 spots were strictly up- or down- regulated while 4 others exhibited an abundance curve with a transient maximum. After manual picking of 43 selected spots based on their expression profile, 32 proteins were identified by MS/MS. Differentially expressed proteins are mainly involved in patatin catabolism, stress response, glycolysis, protein turn-over and lipid oxidation. A complementary targeted approach has then been set up based on the free radical ageing theory. SOD, CAT, APX and POX activities as well as ascorbate, glutathione, carotenoid and phenolic compound contents were measured during ageing. These data seem to indicate that the antioxidant system undergoes marked changes in response to an increased production of reactive oxygen species. However, no accumulation of oxidative damages has been observed on lipids and proteins. All these kinetic data allowed us to build an integrated ageing model. These results are discussed in the above-mentioned theoretical context. [less ▲]

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See detailMyzus persicae Sulzer aphid contains oxylipins that originate from phloem sap.
Harmel, Nicolas; Delaplace, Pierre ULg; Blée, Elizabeth et al

in Journal of Plant Interactions (2007), 2

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See detailCatalase Inhibition Alters Suberization And Wound Healing In Potato (Solanum Tuberosum) Tubers
Bajji, M.; M'Hamdi, M.; Gastiny, F. et al

in Physiologia Plantarum (2007), 129(3), 472-483

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See detailPotato Tuber Proteomics: Comparison Of Two Complementary Extraction Methods Designed For 2-De Of Acidic Proteins
Delaplace, Pierre ULg; Van Der Wal, F.; Dierick, Jf. et al

in Proteomics (2006), 6(24), 6494-6497

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