Proteomics dataset on detached and purified Arabidopsis thaliana rosette leaf trichomes

Trichomes are highly specialized uni- or multicellular outgrowths of epidermal cells of plant organs that, in the case of leaves, contribute to plant resistance against abiotic and biotic stress. The model plant Arabidopsis thaliana features single-celled non-glandular rosette leaf trichomes that are dispensable under laboratory conditions. Trichomes have therefore become a successful model to identify plant genes involved in cellular differentiation and cell wall development. We have recently devised an improved method for the enrichment of plant leaf trichomes that relies on the biochemical weakening of the trichome-leaf junctions and a magnetic stirrer-based mechanical stimulus for trichome release followed by density gradient purification of trichomes. Here we provide detailed information on a label-free quantitative (LFQ) shotgun proteomics dataset collected at four stages while applying this protocol to isolate trichomes from rosette leaves of A. thaliana , from (i) whole seedlings before enrichment, from (ii) trichome-depleted material after separa tion, from (iii) detached trichomes, and from (iv) enriched trichomes after sucrose density gradient centrifugation. Pro-teins were extracted, digested with trypsin and the result-ing peptides identified by nanoflow-chromatography cou-pled to tandem mass spectrometry. This dataset informs on proteins and biochemical processes present and/or enriched in A. thaliana rosette leaf trichomes, complementing recent large-scale proteome maps. The data further enables compar-ative analysis with trichome proteomic data from other plant species, may be reanalyzed using different software packages or search settings, and may serve as a reference benchmark for future method refinement. (c) 2023 The Author(s). Published by Elsevier Inc. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)