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On the role of DGAT1 in seed glycerolipid metabolic network and critical stages of plant development in Arabidopsis

DOITrouver le DOI : https://doi.org/10.1002/lipd.12229
AuteurRechercher : 1; Rechercher : 1; Rechercher : 1; Rechercher : 1; Rechercher : 1; Rechercher : 1
Affiliation
  1. Conseil national de recherches Canada. Développement des cultures et des ressources aquatiques
FormatTexte, Article
Sujetdiacylglycerol acyltransferase; membrane structure; phosphatidylcholine; storage lipid
Résumé
Studies on the model plant Arabidopsis thaliana have uncovered the identities of most enzymatic components involved in seed storage lipid biosynthesis. However, much remains to be learned on how pathway interactions operate in the seed metabolic network. In this study, we dissected seed glycerolipid molecular compositional changes in the Arabidopsis mutant deficient in diacylglycerol acyltransferase 1 (DGAT1). Our results indicate that metabolic adjustments occurred in both phosphatidylcholine synthesis and deacylation in developing seeds. Ultrastructural changes of perturbed oil and protein bodies were also evident in cotyledon parenchyma cells. To unmask the physiological and developmental role associated with DGAT1‐mediated neutral lipid biosynthesis, we attempted to combine dgat1 mutation with lpcat2 that harbors a defect in lysophosphatidylcholine acyltransferase 2 (LPCAT2). Disruption in both DGAT1 and LPCAT2 led to an apparent defect in pollen development that manifested as pollen sterility. Collectively, our results highlight a role of DGAT1 in both storage lipid synthesis and plant development.
Date de publication
Maison d’éditionWiley
American Oil Chemists' Society (AOCS)
Dans
  • Lipids 55, nº 5 : 457–467.
Langueanglais
Publications évaluées par des pairsOui
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Identificateur de l’enregistrement8cd17afa-730f-4ba2-9e96-4777f3d0f30a
Enregistrement créé2020-10-28
Enregistrement modifié2020-11-04

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