Biopharma Insights BLISS, a dual labeling protocol for studying lignification dynamics, was developed. Using synthetic monolignol reporters and a sequential combination of SPAAC and CuAAC bioorthogonal click reactions, this methodology paves the way to in-depth analysis of the factors that regulate the biogenesis of lignins in planta.
Total time
~3–4 days (including metabolic incorporation, sample preparation, labeling, and imaging)
Model organism
Arabidopsis thaliana
Steps
1
Metabolically incorporate monolignol chemical reporters
Introduce synthetic monolignol reporters into plant tissues to enable bioorthogonal labeling of lignin precursors during active lignification. Incubate plant samples with reporter substrates for metabolic uptake and incorporation into developing lignin.
▶ 01:18
2
Perform sequential SPAAC and CuAAC click reactions
Apply dual fluorescence labeling by sequentially conducting strain-promoted azide-alkyne cycloaddition (SPAAC) followed by copper-catalyzed azide-alkyne cycloaddition (CuAAC) on plant cross-sections. Each reaction couples distinct fluorophores to reporter-labeled lignins.
▶ 03:29
3
Mount labeled samples on microscope slides
Transfer processed plant cross-sections to microscope slides with appropriate mounting medium to preserve fluorescence and prepare samples for confocal or epifluorescence imaging.
▶ 06:08
4
Image and analyze lignification dynamics
Acquire fluorescence microscopy images to visualize spatiotemporal patterns of lignin deposition. Analyze dual-labeling signal to assess lignification rates and regulatory factors affecting lignin biogenesis.
▶ 07:49