In order to protect crops by improving their innate disease-resistant mechanisms, plant defence activators must produce systemic acquired resistance (SAR). Seven weed extracts that had previously been demonstrated as potential plant defence activators inducing SAR in a bioassay using cucumber plants (Cucumis sativus L.) and Colletotrichum orbiculare were evaluated for their SAR-inducing potential using SAR marker genes in Arabidopsis thaliana in order to screen for plant species that contain active substances as plant defence activators. Extracts from three oxalate-rich species closely related to the gigantic knotweed (Fallopia sachalinensis), which is utilised as a plant defence activator, were also tested. The results showed that the expression of SAR marker genes PR1 and PR5 was higher in A. thaliana plants treated with seven different weed species, including Pueraria montana, Trifolium pretence, Boehmeria nivea, Sedum japonicum, Gamochaeta purpurea, Silene armeria, and Fallopia japonica, compared to those treated with water. These plant extracts have the potential to operate as SAR inducers and defence activators.
Author (S) Details
Hidehiro Inagaki
Faculty of Agriculture, Shizuoka University, 836, Ohya, Suruga-ku, Shizuoka 422-8529, Japan.
Yukiko Usui
Faculty of Agriculture, Shizuoka University, 836, Ohya, Suruga-ku, Shizuoka 422-8529, Japan.
View Book :- https://stm.bookpi.org/CTAS-V1/article/view/3884
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