ArticleThe New phytologist2026
Arabidopsis root lipid droplets are hubs for membrane homeostasis under heat stress, and triterpenoid synthesis and storage.
Article in The New phytologist, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed.
- Plant viruses tap into lipid droplet biology.The New phytologist · 2026Article
- Lipid droplet proteome plasticity in plant evolution, growth and development, and response to stress.Journal of experimental botany · 2026Review
- A lipid droplet - plasma membrane contact site is conserved across the angiosperm lineage.Protoplasma · 2026Article
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23 authors.
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Abstract
Plant lipid droplets (LDs) and their associated proteins have numerous subcellular and physiological functions. While considerable progress has been made for LDs in many tissues, the function and composition of LDs in roots remain largely unexplored. We investigated the changes in the number of LDs and the lipidome in heat-stressed Arabidopsis thaliana roots. Furthermore, we isolated root LDs from the Arabidopsis mutant trigalactosyldiacylglycerol 1-1 sugar dependent 1-4 and investigated its proteome and lipidome. Heat stress led to a degradation of membrane lipids and an increase in triacylglycerols and LDs, while fatty acid steryl esters decreased, probably acting as precursors for acylated sterol glycosides. A variety of proteins were enriched in root LDs, which are thus far not described as LD proteins. Transient expression of these proteins in many cases confirmed their LD localization, for example of the triterpene biosynthetic enzymes thalianol synthase and marneral synthase. We could furthermore show that the educts and products of these enzymes are enriched in root LDs, too. We conclude that root LDs simultaneously act as a sink and source during heat stress-induced membrane remodeling. Furthermore, root LDs play a pivotal role in triterpene synthesis and storage, thereby highlighting LDs as hubs in specialized metabolism.
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