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Resveratrol is a major phytoalexin in grapevine but its synthesis in response to phytopathogen attack decreases with grape berry ripening. A chimeric gene combining an alfalfa PR 10 promoter and Vst1 (Vitis stilbene synthase 1) gene was introduced into the genome of 41B rootstock. Transgenic plants were analysed for resveratrol production in leaves infected(More)
Infiltration of Medicago sativa leaves with a suspension of Pseudomonas syringae pv. pisi elicits the accumulation of several mRNA classes. A clone, designated as MsPR10-1, encoding a polypeptide exhibiting strong similarity to the class 10 PR protein was isolated and characterized from a cDNA library prepared from leaf mRNA. The corresponding gene was(More)
We report on the interactions of alfalfa with Xanthomonas campestris pv. alfalfae and Pseudomonas syringae pv. pisi. A hypersensitive response was observed when leaves were infiltrated with P. s. pv. pisi, which remained strictly limited to the injected zone. The compatible interaction with X. c. pv. alfalfae was characterized by water-soaking symptoms and(More)
The hydrolysis of Mg2+-adenosine 5'-triphosphate (ATP) by heavy meromyosin has been studied between +20 and -15 degrees C, especially in the low-temperature range, in a medium containing 30% (v/v) ethylene glycol by fluorometric, spectrophotometric, and potentiometric measurements. The time course of the fluorescence changes of the enzyme during the(More)
We have isolated, cloned, and characterized two cDNAs corresponding to the mRNAs for cationic peroxidases synthesized by cultured peanut cells. The first clone was obtained from a phage lambda gt11 library screened with antibodies directed against the major secreted isozyme. Its predicted amino acid sequence, deduced from the 1228-base-pair (bp) cDNA,(More)
A cDNA encoding a putative cytoplasmic ribosomal protein L5 from alfalfa (MsRL5), the first sequence from higher plants, has been characterized. The derived amino acid sequence of 181 residues contains the L5 signature, is 72.2% identical to yeast ribosomal L5 and shares high identity with other RL5 peptides from eukaryotic origin. The sequence does not(More)
Mechanical stress following surgery or injury can promote pathological wound healing and fibrosis, and lead to functional loss and esthetic problems. Splinted excisional wounds can be used as a model for inducing mechanical stress. The cytoprotective enzyme heme oxygenase-1 (HO-1) is thought to orchestrate the defense against inflammatory and oxidative(More)
Peanut (Arachis hypogea L.) peroxidase gene expression was analyzed by measuring the accumulation of trancripts in cultured cells and various plant parts (leaf, stem, root) and upon their treatment with ethylene or wounding, respectively. Two transcripts (prxPNC1 and prxPNC2) corresponding to two peroxidase genes are expressed at higher levels in cultured(More)
As far as flocculation is concerned, the agglomeration of suspended particles into flocs is highly linked to the hydraulic behaviour of the agitation. The Turbomix is a special design of mixing tank; its design was developed to better control the flow during the flocculation stage. It enables a significant decrease in footprint of the process. The(More)
A comparative study of the dissociation into subunits of Porcine alpha2 M, either native or bound to trypsin (Tn), has been carried out in order to determine the modifications of the alpha2 M structure due to the formation of the Tn-alpha2 M complex. Analytical ultra-centrifugation at pH 3.5 shows that the dissociation is smaller when alpha 2 M is bound to(More)