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- W2064758901 abstract "Cell death plays a ubiquitous role in plant-microbe interactions, given that it is associated with both susceptible and resistance interactions. A class of cell death-inducing proteins, termed Nepl-like proteins (NLPs), has been reported in bacteria, fungi, and oomycetes. These proteins induce nonspecific necrosis in a variety of dicotyledonous plants. Here, we describe three members of the NLP family from the oomycete Phytophthora infestans (PiNPP1.1, PiNPP1.2, and PiNPP1.3). Using agroinfection with a binary Potato virus X vector, we showed that PiNPP1.1 induces cell death in Nicotiana benthamiana and the host plant tomato. Expression analyses indicated that PiNPP1.1 is up-regulated during late stages of infection of tomato by P. infestans. We compared PiNPP1.1 necrosis-inducing activity to INF1 elicitin, a well-studied protein that triggers the hypersensitive response in Nicotiana spp. Using virus-induced gene silencing, we showed that the cell death induced by PiNPP1.1 is dependent on the ubiquitin ligase-associated protein SGT1 and the heat-shock protein HSP90. In addition, cell death triggered by PiNPP1.1 but not that by INF1 was dependent on the defense-signaling proteins COI1, MEK2, NPR1, and TGA2.2, suggesting distinct signaling requirements. Combined expression of PiNPP1.1 and INF1 in N. benthamiana resulted in enhanced cell death, suggesting synergistic interplay between the two cell-death responses. Altogether, these results point to potentially distinct but interacting cell-death pathways induced by PiNPP1.1 and INF1 in plants." @default.
- W2064758901 created "2016-06-24" @default.
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- W2064758901 date "2006-08-01" @default.
- W2064758901 modified "2023-09-25" @default.
- W2064758901 title "Synergistic Interactions of the Plant Cell Death Pathways Induced by <i>Phytophthora infestans</i> Nep1-Like Protein PiNPP1.1 and INF1 Elicitin" @default.
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- W2064758901 doi "https://doi.org/10.1094/mpmi-19-0854" @default.
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