Comprehensive multiphase NMR: a promising technology to study plants in their native state

Area of Science:

• Plant molecular biology
• Biophysical chemistry
• Spectroscopic analysis

Background:

• Nuclear magnetic resonance (NMR) spectroscopy is crucial for studying plant molecular structure and interactions.
• Traditional NMR methods are separated into liquid-state and solid-state techniques, limiting analysis of native plant samples.
• Plants contain diverse components in soluble, swollen, and solid phases, necessitating integrated analytical approaches.

Purpose of the Study:

• To apply comprehensive multiphase (CMP)-NMR spectroscopy for analyzing native, unaltered plant samples.
• To evaluate CMP-NMR's capability in differentiating molecular components across various phases within intact plants.
• To compare the metabolic and structural profiles of wild-type Arabidopsis thaliana and the eli1 mutant using CMP-NMR.

Main Methods:

• Utilized comprehensive multiphase (CMP)-NMR spectroscopy, integrating solution, gel, and solid-state NMR into a single probe.
• Analyzed intact samples of wild-type Arabidopsis thaliana and the cellulose-deficient mutant ectopic lignification1 (eli1).
• Compared CMP-NMR data with conventional methods, assessing the impact of sample extraction.

Main Results:

• CMP-NMR enabled in situ study and differentiation of components in all phases of native plant samples.
• Analysis of intact samples eliminated extraction bias, yielding a more complete structural and metabolic profile.
• CMP-NMR identified molecular differences between WT and eli1, including higher abundance of methanol, fatty acids/lipids, glutamine, phenylalanine, starch, nucleic acids, and pentaglycine in eli1.

Conclusions:

• CMP-NMR is a powerful tool for comprehensive plant analysis, studying native samples without prior extraction.
• The technology reveals molecular distinctions between plant genotypes that may be missed by conventional NMR methods.
• CMP-NMR provides enhanced insights into plant molecular composition and metabolic variations.