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Knockdown of MLO genes reduces susceptibility to powdery mildew in grapevine

Horticulture Research 2016年第1期3卷 248-256页

作者： Stefano Pessina Luisa Lenzi Michele Perazzolli Manuela Campa Lorenza Dalla Costa simona urso Giampiero Valè Francesco Salamini Riccardo Velasco Mickael Malnoy Research and Innovation Centre Fondazione Edmund Machvia Edmund Mach 1San Michele all’Adige38010Italy Wageningen UR Plant Breeding Wageningen University and Research CentrePO Box 386Wageningen6700AJThe Netherlands Department of Ecological and Biological Sciences Universitàdella TusciaVia San Camillo de LellisViterbo01100Italy Council for Agricultural Research and Economics(CREA) Rice Research UnitS.S.11 per Torino km 25Vercelli13100Italy Council for Agricultural Research and Economics(CREA) Genomics Research CentreVia San Protaso302Fiorenzuola d’Arda29017PiacenzaItaly

Erysiphe necator is the causal agent of powdery mildew(PM),one of the most destructive diseases of *** is controlled by sulfur-based and synthetic fungicides,which every year are dispersed into the *** is why PM-resistant varieties should become a priority for sustainable grapevine and wine *** resistance can be achieved in other crops by knocking out susceptibility S-genes,such as those residing at genetic loci known as MLO(Mildew Locus O).All MLO S-genes of dicots belong to the phylogenetic clade V,including grapevine genes VvMLO7,11 and 13,which are upregulated during PM infection,and VvMLO6,which is not *** adopting a gene-editing approach to knockout candidate S-genes,the evidence that loss of function of MLO genes can reduce PM susceptibility is *** paper reports the knockdown through RNA interference of VvMLO6,7,11 and *** knockdown of VvMLO6,11 and 13 did not decrease PM severity,whereas the knockdown of VvMLO7 in combination with VvMLO6 and VvMLO11 reduced PM severity up to 77%.The knockdown of VvMLO7 and VvMLO6 seemed to be important for PM resistance,whereas a role for VvMLO11 does not seem *** wall appositions(papillae)were present in both resistant and susceptible lines in response to PM *** genes involved in defense were less upregulated in infected mlo plants,highlighting the early mlo-dependent disruption of PM invasion.

关键词： MLO crops mildew

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