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  • Title: Synergic interactions between 2-deoxy-D-glucose and Candida saitoana enhances citrus green mould control.
    Author: Arras G, Pani G, Molinu MG, Dore A, Venditti T, Petretto A, Marceddu S, D'Hallewin G.
    Journal: Commun Agric Appl Biol Sci; 2010; 75(4):555-62. PubMed ID: 21534462.
    Abstract:
    The activity of 2-deoxy-D-gLucose (2-DG) alone or in combination with a biocontrol yeast (Candida saitoana, strain 8C) was evaluated in vitro and in vivo against citrus green mould (Penicillium digitatum Sacc.). The in vitro assays were performed on amended potato dextrose agar (PDA) containing 0, 1.5, 3.0, 6.0, 15.0, 30.0 or 60.0 mM of 2-DG. P. digitatum conidia were sown on the amended media and growth inhibition occurred starting from 6.0 mM. A nearly total inhibition of the growth and spore germination occurred with 60.0 mM of 2-DG. The antagonist was not affected by any of the 2-DG concentrations employed and the amended plates resulted well colonized within 2 d post-treatment. In vivo assays were carried out with 'Hamlin' oranges, inoculated with P. digitatum 24 h before treating with: the antagonist; the above reported concentrations of 2-DG, or by combining the two treatments. Seven days post-treatment the inhibition activity exerted by 3.0, 6.0, 15.0, 30.0 and 60.0 mM of 2-DG combined with the yeast was 15, 37, 42, 63 and 84%, respectively. While that exerted by the antagonist was 22% and that by the different concentrations of 2-DG were 7, 11, 27, 42 and 57%, respectively. Compared to single treatments, the co-application significantly and in a synergic mode improved the control of decay. Alterations to the hyphae were observed by SEM when the pathogen was cultured on amended media and into the wounds of inoculated oranges.
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