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- W2954881309 abstract "Elicitors play an important role in plant and pathogen interactions. The discovery of new elicitors and their effects on plant defense responses is significant and challenging. In this study, we investigated novel elicitors from Phytophthora palmivora and their effects on plant defenses. A crude elicitor isolated by ethanol precipitation from culture filtrates of P. palmivora induced cell death in tobacco leaves. When tobacco leaves were infiltrated with this cell death-inducing elicitor, the accumulations of H 2 O 2 , salicylic acid (SA), scopoletin (Scp), and abscisic acid (ABA) were detected. Accumulations of SA, Scp, and ABA were also induced in rubber tree leaves. P. palmivora infection significantly increased in rubber tree leaves pretreated with the elicitor and cotreated with the elicitor and zoospores of P. palmivora. This elicitor can be described as compound elicitor because Fourier-transform infrared spectroscopy revealed that it consisted of both polysaccharide and protein. We also found that the cell death effect caused by this compound elicitor was completely neutralized by Proteinase K. The compound elicitor was composed of four fractions which were beta-glucan, high-molecular-weight glycoprotein, broad-molecular-weight glycoprotein and 42-kDa protein. Interestingly, the broad-molecular-weight glycoprotein caused the highest level of cell death in tobacco leaves, while the beta-glucan had no effect. The high-molecular-weight glycoprotein, broad-molecular-weight glycoprotein and 42-kDa protein fractions not only caused cell death in tobacco leaves but also induced high levels of SA accumulation. Furthermore, these three fractions clearly promoted P. palmivora infection of rubber tree leaves." @default.
- W2954881309 created "2019-07-12" @default.
- W2954881309 creator A5031093872 @default.
- W2954881309 creator A5079918710 @default.
- W2954881309 date "2019-10-01" @default.
- W2954881309 modified "2023-09-27" @default.
- W2954881309 title "Novel Cell Death-Inducing Elicitors from Phytophthora palmivora Promote Infection on Hevea brasiliensis" @default.
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- W2954881309 doi "https://doi.org/10.1094/phyto-01-19-0002-r" @default.
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