Leaf Trichomes as an Effective Structure for Disease Resistance: The Case of Grapevine Downy Mildew

JARQ : Japan Agricultural Research Quarterly
ISSN 00213551
書誌レコードID(総合目録DB) AA0068709X

Leaf trichomes confer pest resistance. Dense trichomes could also present a physical barrier to microorganisms, such as grapevine downy mildew caused by Plasmopara viticola on grape. Zoospores of P. viticola swim in water and enter stomata. Some wild Vitis accessions such as V. labrusca and V. cinerea have highly hydrophobic, dense, prostrate trichomes on the lower leaf surface that repel water and enhance resistance to downy mildew. Quantitative trait loci for leaf trichome density have been identified on LGs 5, 7, 8, and 15 of grapevine. A major locus on LG 5 was found in V. vinifera ‘Muscat of Alexandria’, which has few leaf trichomes. Hairless alleles on LG 5 in historical V. vinifera cultivars reduce trichome density in the progeny of V. labrusca origin. Applying information on these loci in breeding programs would allow the introduction of this natural physical barrier against pathogenic microorganisms into cultivars.

作成者 Atsushi KONO Takeo SHIMIZU

preexisting disease resistance

Plasmopara viticola

Vitis labrusca

Vitis vinifera

公開者 Japan International Research Center for Agricultural Sciences
受付日 2019-12-17
受理日 2020-03-05
開始ページ 293
終了ページ 298
DOI 10.6090/jarq.54.293
言語 eng