cinerea antigens with DNA of B. cinerea present in fruit tissues. In addition, the immunological reaction between monoclonal antibodies for B. cinerea and antigens from others fungi, frequently isolated

from fruits resulted in no cross-reactions. In conclusion, this method promises to be particularly useful in the analysis of symptomless fruits, either to locate latent infections, avoiding thus, conventional culturing techniques, which are not only time-consuming, but also are not able to give a quantitative result. Methods Reagents and click here solutions All reagents used were of analytical reagent grade. The monoclonal antibody for B. cinerea (BC-12.CA4) and the secondary antibody-enzyme conjugate SBE-��-CD in vitro (anti-mouse polyvalent immunoglobulins peroxidase conjugate) were obtained from ADGEN diagnostics (Auchincruive, Scotland) and Sigma Chemical (St. Louis, MO, USA) respectively. Glutaraldehyde (25% aqueous solution), hydrogen peroxide (H2O2), sodium clorure (NaCl) and sulfuric acid (H2SO4) were purchased from Merck (Darmstadt, Germany). Bovine serum albumin (BSA), Horseradish peroxidase (HRP), orthophenylenediamine (OPD) and Tween 20 were purchased from Sigma-Aldrich (St. Louis, MO, USA). All other reagents employed were of analytical grade and were used without further purification. Aqueous solutions were prepared using purified water from a Milli-Q-system. ELISA plate (Costar 3590, high binding polystyrene, 96

LY411575 chemical structure wells assay plate) was purchased from Costar (Corning, Massachusetts, USA). Intrumentation All solutions and reagents were conditioned to 37°C before the experiment, using a laboratory water bath Vicking Mason Ii (Vicking SRL, Argentina). All pH measurements

were made with an Orion Expandable Ion Analyzer (model EA 940, Orion Research, Cambridge, MA, USA) equipped with a glass combination electrode (Orion Research). Absorbance was measured with an automatic ELISA reader (Bio-Rad 3550-UV Microplate Reader, Japan) and Beckman DU 520 General UV/vis spectrophotometer (USA). All polymerase chain reactions (PCR) were carried out on the PCR Oxalosuccinic acid Thermocycler (BIO-RAD, USA). Microscopic studies were carried out on the Olympus CH 30 (Spectra services, N.Y., USA). PCR assays The primers used for PCR assays were: ribosomal region 18S (IGS spacer) 5′-ATGAGCCATTCGCAGTTTC-3′ (GenBank Accession no: J01353). To determine the transposable elements status of each isolate, whether they were of vacuma or transposa type, we focused on the detection of Flipper with the primers F-300 5′GCACAAAACCTACAGAAGA-3′ (GenBank Accession no: U74294) and the detection of Boty with the two primers B-R 5′-TAACCTTGTCTTTGCTCATC-3 and B-L 5′-CCCAATTT-ATTCAATGTCAG-3′. (GenBank Accession no: X81790 and X81791). Each reaction was performed with: 6 μL of primers, 2.5 μL of dNTP, 2.5 μL of DNA, 2.5 μL of Mg+2, and 0.5 μL of Taq polymerase in a total volume of 50 μL.