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- W4282918924 abstract "In Brassicaceae, hypersensitive-like programmed cell death (HR-like) is a central component of direct defenses triggered against eggs of the large white butterfly (Pieris brassicae). The signaling pathway leading to HR-like in Arabidopsis (Arabidopsis thaliana) is mainly dependent on salicylic acid (SA) accumulation, but downstream components are unclear. Here, we found that treatment with P. brassicae egg extract (EE) triggered changes in expression of sphingolipid metabolism genes in Arabidopsis and black mustard (Brassica nigra). Disruption of ceramide (Cer) synthase activity led to a significant decrease of EE-induced HR-like whereas SA signaling and reactive oxygen species levels were unchanged, suggesting that Cer are downstream activators of HR-like. Sphingolipid quantifications showed that Cer with C16:0 side chains accumulated in both plant species and this response was largely unchanged in the SA-induction deficient2 (sid2-1) mutant. Finally, we provide genetic evidence that the modification of fatty acyl chains of sphingolipids modulates HR-like. Altogether, these results show that sphingolipids play a key and specific role during insect egg-triggered HR-like." @default.
- W4282918924 created "2022-06-16" @default.
- W4282918924 creator A5019629618 @default.
- W4282918924 creator A5066047889 @default.
- W4282918924 creator A5066486398 @default.
- W4282918924 creator A5087424935 @default.
- W4282918924 date "2022-05-24" @default.
- W4282918924 modified "2023-10-13" @default.
- W4282918924 title "Sphingolipids are involved in insect egg-induced cell death in Arabidopsis" @default.
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