ArticlePlant & cell physiology2022
Sphingolipid-Induced Programmed Cell Death is a Salicylic Acid and EDS1-Dependent Phenotype in Arabidopsis Fatty Acid Hydroxylase (Fah1, Fah2) and Ceramide Synthase (Loh2) Triple Mutants.
Article in Plant & cell physiology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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10 citing papers in PubMed, 19 citations in OpenAlex.
- Complex sphingolipid metabolism impacts cell division and plasmodesmal development in the moss Physcomitrium patens.Plant physiology · 2025Article
- Identification of INOSITOL PHOSPHORYLCERAMIDE SYNTHASE 2 (IPCS2) as a new rate-limiting component in Arabidopsis pathogen entry control.The Plant journal : for cell and molecular biology · 2025Article
- The fatty acid 2-hydroxylase CsSCS7 is a key hyphal growth factor and potential control target inmBio · 2024Article
- Root-associated Streptomyces produce galbonolides to modulate plant immunity and promote rhizosphere colonization.The ISME journal · 2024Article
- Sphingolipid Long-Chain Base Signaling in Compatible and Non-Compatible Plant-Pathogen Interactions in Arabidopsis.International journal of molecular sciences · 2023Article
- New Paradigms in Brassinosteroids, Strigolactones, Sphingolipids, and Nitric Oxide Interaction in the Control of Lateral and Adventitious Root Formation.Plants (Basel, Switzerland) · 2023Review
- Cell death induced by mycotoxin fumonisin BPlant cell reports · 2022Article
- Sphingolipids are involved in insect egg-induced cell death in Arabidopsis.Plant physiology · 2022Article
- The Two Classes of Ceramide Synthases Play Different Roles in Plant Immunity and Cell Death.Frontiers in plant science · 2022Article
- Editorial: Lipid metabolism and membrane structure in plant biotic interactions.Frontiers in plant science · 2022Article
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7 authors at 1 institution in 1 country.
Funding
Abstract
Ceramides (Cers) and long-chain bases (LCBs) are plant sphingolipids involved in the induction of plant programmed cell death (PCD). The fatty acid hydroxylase mutant fah1 fah2 exhibits high Cer levels and moderately elevated LCB levels. Salicylic acid glucoside level is increased in this mutant, but no cell death can be detected by trypan blue staining. To determine the effect of Cers with different chain lengths, fah1 fah2 was crossed with ceramide synthase mutants longevity assurance gene one homologue1-3 (loh1, loh2 and loh3). Surprisingly, only triple mutants with loh2 show cell death detected by trypan blue staining under the selected conditions. Sphingolipid profiling revealed that the greatest differences between the triple mutant plants are in the LCB and LCB-phosphate (LCB-P) fraction. fah1 fah2 loh2 plants accumulate LCB d18:0, LCB t18:0 and LCB-P d18:0. Crossing fah1 fah2 loh2 with the salicylic acid (SA) synthesis mutant sid2-2 and with the SA signaling mutants enhanced disease susceptibility 1-2 (eds1-2) and phytoalexin deficient 4-1 (pad4-1) revealed that lesions are SA- and EDS1-dependent. These quadruple mutants also confirm that there may be a feedback loop between SA and sphingolipid metabolism as they accumulated less Cers and LCBs. In conclusion, PCD in fah1 fah2 loh2 is a SA- and EDS1-dependent phenotype, which is likely due to accumulation of LCBs.
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