{"id":12286,"date":"2024-04-05T14:03:18","date_gmt":"2024-04-05T14:03:18","guid":{"rendered":"https:\/\/olmix.com\/?p=12286"},"modified":"2024-09-16T12:45:23","modified_gmt":"2024-09-16T12:45:23","slug":"evolution-du-deoxynivalenol-dans-le-ble-au-stockage","status":"publish","type":"post","link":"https:\/\/olmix.com\/fr\/evolution-du-deoxynivalenol-dans-le-ble-au-stockage\/","title":{"rendered":"Evolution du d\u00e9oxynival\u00e9nol dans le bl\u00e9 au stockage"},"content":{"rendered":"[vc_row type=\u00a0\u00bbin_container\u00a0\u00bb full_screen_row_position=\u00a0\u00bbmiddle\u00a0\u00bb column_margin=\u00a0\u00bbdefault\u00a0\u00bb column_direction=\u00a0\u00bbdefault\u00a0\u00bb column_direction_tablet=\u00a0\u00bbdefault\u00a0\u00bb column_direction_phone=\u00a0\u00bbdefault\u00a0\u00bb scene_position=\u00a0\u00bbcenter\u00a0\u00bb constrain_group_4=\u00a0\u00bbyes\u00a0\u00bb text_color=\u00a0\u00bbdark\u00a0\u00bb text_align=\u00a0\u00bbleft\u00a0\u00bb 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column_link_target=\u00a0\u00bb_self\u00a0\u00bb overflow=\u00a0\u00bbvisible\u00a0\u00bb gradient_direction=\u00a0\u00bbleft_to_right\u00a0\u00bb overlay_strength=\u00a0\u00bb0.3″ width=\u00a0\u00bb1\/1″ tablet_width_inherit=\u00a0\u00bbdefault\u00a0\u00bb animation_type=\u00a0\u00bbdefault\u00a0\u00bb bg_image_animation=\u00a0\u00bbnone\u00a0\u00bb border_type=\u00a0\u00bbadvanced\u00a0\u00bb border_left_desktop=\u00a0\u00bb1″ column_border_color=\u00a0\u00bb#269756″ column_border_style=\u00a0\u00bbsolid\u00a0\u00bb column_padding_type=\u00a0\u00bbdefault\u00a0\u00bb gradient_type=\u00a0\u00bbdefault\u00a0\u00bb][vc_column_text el_class=\u00a0\u00bbmed\u00a0\u00bb]Le commerce mondial du bl\u00e9 et son transport ult\u00e9rieur entra\u00eenent une augmentation de la dur\u00e9e de stockage des c\u00e9r\u00e9ales, qui peut entra\u00eener un risque mycotoxine. Dans leur \u00e9tude,\u00a0Wang<\/em>\u00a0et al.<\/em>\u00a0ont simul\u00e9 diff\u00e9rentes conditions de stockage (temps, temp\u00e9rature, humidit\u00e9, teneur initiale en mycotoxines) et \u00e9valu\u00e9 leurs effets sur les communaut\u00e9s fongiques et la contamination par les mycotoxines, en mettant l\u2019accent sur le d\u00e9oxynival\u00e9nol (DON) et sa forme masqu\u00e9e D3G.<\/strong>[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_row_inner column_margin=\u00a0\u00bbdefault\u00a0\u00bb column_direction=\u00a0\u00bbdefault\u00a0\u00bb column_direction_tablet=\u00a0\u00bbdefault\u00a0\u00bb column_direction_phone=\u00a0\u00bbdefault\u00a0\u00bb top_padding=\u00a0\u00bb2%\u00a0\u00bb constrain_group_1=\u00a0\u00bbyes\u00a0\u00bb bottom_padding=\u00a0\u00bb2%\u00a0\u00bb text_align=\u00a0\u00bbleft\u00a0\u00bb row_position=\u00a0\u00bbdefault\u00a0\u00bb row_position_tablet=\u00a0\u00bbinherit\u00a0\u00bb row_position_phone=\u00a0\u00bbinherit\u00a0\u00bb overflow=\u00a0\u00bbvisible\u00a0\u00bb pointer_events=\u00a0\u00bball\u00a0\u00bb][vc_column_inner column_padding=\u00a0\u00bbno-extra-padding\u00a0\u00bb column_padding_tablet=\u00a0\u00bbinherit\u00a0\u00bb column_padding_phone=\u00a0\u00bbinherit\u00a0\u00bb column_padding_position=\u00a0\u00bball\u00a0\u00bb column_element_direction_desktop=\u00a0\u00bbdefault\u00a0\u00bb column_element_spacing=\u00a0\u00bbdefault\u00a0\u00bb desktop_text_alignment=\u00a0\u00bbdefault\u00a0\u00bb tablet_text_alignment=\u00a0\u00bbdefault\u00a0\u00bb phone_text_alignment=\u00a0\u00bbdefault\u00a0\u00bb background_color_opacity=\u00a0\u00bb1″ background_hover_color_opacity=\u00a0\u00bb1″ column_backdrop_filter=\u00a0\u00bbnone\u00a0\u00bb column_shadow=\u00a0\u00bbnone\u00a0\u00bb column_border_radius=\u00a0\u00bbnone\u00a0\u00bb column_link_target=\u00a0\u00bb_self\u00a0\u00bb overflow=\u00a0\u00bbvisible\u00a0\u00bb gradient_direction=\u00a0\u00bbleft_to_right\u00a0\u00bb overlay_strength=\u00a0\u00bb0.3″ width=\u00a0\u00bb1\/1″ tablet_width_inherit=\u00a0\u00bbdefault\u00a0\u00bb animation_type=\u00a0\u00bbdefault\u00a0\u00bb bg_image_animation=\u00a0\u00bbnone\u00a0\u00bb border_type=\u00a0\u00bbsimple\u00a0\u00bb column_border_width=\u00a0\u00bbnone\u00a0\u00bb column_border_style=\u00a0\u00bbsolid\u00a0\u00bb][vc_column_text]Sans surprise, ind\u00e9pendamment des conditions de stockage, les r\u00e9sultats montrent que les\u00a0moisissures typiques de champs (Alternaria<\/em>,\u00a0Fusarium<\/em>) sont progressivement remplac\u00e9es par des moisissures de stockage (Aspergillus<\/em>\u00a0principalement),<\/strong>\u00a0bien que\u00a0Fusarium<\/em>\u00a0ait d\u2019abord augment\u00e9 avant de diminuer jusqu\u2019\u00e0 inhibition compl\u00e8te.<\/p>\n

La contamination par le DON a consid\u00e9rablement \u00e9volu\u00e9 au stockage.<\/strong>\u00a0Au cours du premier mois de stockage, le niveau de DON a augment\u00e9 d\u2019environ 14 % dans toutes les conditions de stockage. Un stockage plus long a eu des effets diff\u00e9rents sur le taux de DON dans le bl\u00e9 : \u00e0 25 \u00b0C, le niveau a augment\u00e9 de 36 % alors qu\u2019il a diminu\u00e9 \u00e0 30 et 35 \u00b0C.\u00a0Le changement d\u2019humidit\u00e9 a \u00e9galement accentu\u00e9 la production de DON\u00a0<\/strong>: une humidit\u00e9 relative (HR) de 12 % et 15 % a augment\u00e9 les niveaux de DON d\u2019environ 67 % par rapport \u00e0 un stockage \u00e0 13 % d\u2019HR.\u00a0Le niveau de D3G \u00e9tait fortement associ\u00e9 au niveau de DON<\/strong>\u00a0(D3G \u00e9tant converti \u00e0 partir de DON) et a augment\u00e9 jusqu\u2019\u00e0 202% dans des certaines conditions (li\u00e9es \u00e0 la pr\u00e9sence d\u2019insectes par exemple).[\/vc_column_text][image_with_animation image_url=\u00a0\u00bb13000″ image_size=\u00a0\u00bbfull\u00a0\u00bb animation_type=\u00a0\u00bbentrance\u00a0\u00bb animation=\u00a0\u00bbNone\u00a0\u00bb animation_movement_type=\u00a0\u00bbtransform_y\u00a0\u00bb hover_animation=\u00a0\u00bbnone\u00a0\u00bb alignment=\u00a0\u00bb\u00a0\u00bb border_radius=\u00a0\u00bbnone\u00a0\u00bb box_shadow=\u00a0\u00bbnone\u00a0\u00bb image_loading=\u00a0\u00bbdefault\u00a0\u00bb max_width=\u00a0\u00bb100%\u00a0\u00bb max_width_mobile=\u00a0\u00bbdefault\u00a0\u00bb][vc_column_text]\n

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Figure : Evolutions de la teneur en d\u00e9oxynival\u00e9nol (DON) dans le bl\u00e9 stock\u00e9 dans des conditions diff\u00e9rentes.\u00a0<\/em>Adapt\u00e9 de Wang et al.<\/em><\/p>\n<\/div>\n<\/div>\n

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De mani\u00e8re g\u00e9n\u00e9rale, l\u2019\u00e9tude indique que\u00a0les conditions de stockage et la teneur initiale en DON influencent fortement les genres de\u00a0Fusarium<\/em>\u00a0producteurs de mycotoxines et modifient la teneur en DON et en D3G<\/strong>. Cela semble \u00eatre corr\u00e9l\u00e9 \u00e0 la comp\u00e9tition entre champignons :\u00a0plus la comp\u00e9tition est forte, plus la production de DON est \u00e9lev\u00e9e<\/strong>.<\/p>\n<\/div>\n<\/div>\n[\/vc_column_text][vc_column_text]\n

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R\u00e9f\u00e9rence :\u00a0<\/i>Wang R., Mengmeng L., Jin R., Liu Y., Guan E., Mohamed S.R., Bian K. Interactions among the composition changes in fungal communities and the main mycotoxins in simulated stored wheat grains. J Sci Food Agric 2024, 104, 373-382.\u00a0<\/em>https:\/\/doi.org\/10.1002\/jsfa.12928<\/em><\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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