Plant Specialized Metabolites: Detection & Key Applications
1. What are Plant Specialized Metabolites?
Plant specialized metabolites, also known as secondary metabolites, are species-specific compounds that enable plants to adapt and thrive in ever-changing ecosystems. In addition to their role in plant survival, many of these compounds exhibit bioactivity and are widely used in natural medicine. These metabolites exhibit structural diversity and are typically classified by their biosynthetic origins, such as terpenoids, phenylpropanoids, fatty acid derivatives, and amino acid derivatives (Figure 1).
2. The Role of Specialized Metabolites in Plant Defense and Growth
Although the exact number of specialized metabolites is still uncertain, it is estimated to range between 200,000 to 1 million. The synthesis and storage of these compounds are developmentally regulated and influenced by both biotic and abiotic factors. For instance, in maize, specialized metabolites are produced in response to abiotic stress (such as drought and heavy metals) and biotic stress (such as insects and bacteria) (Figure 2).
3. Advanced Techniques and Tools for Comprehensive Metabolite Profiling
Plant specialized metabolites, including flavonoids, terpenoids, alkaloids, coumarins, lignans, and glucosinolates, are challenging to detect due to their diverse structures and low concentrations. MetwareBio has developed a cutting-edge, plant-specific database that supports a global, widely-targeted metabolomics service to better meet the needs of life science and human health research.
a) Combining High-Throughput and Sensitivity for Metabolite Detection
Due to the complexity and low abundance of specialized metabolites, detecting them requires high throughput and high sensitivity. There are three main metabolomics technologies: non-targeted metabolomics, targeted metabolomics, and widely-targeted metabolomics. While non-targeted metabolomics offers high throughput, it lacks sensitivity compared to targeted approaches. Widely-targeted metabolomics combines the best of both technologies, providing high throughput, ultra-sensitivity, and broad coverage.
Chen et al. Mol Plant. 2013 Nov;6(6):1769-80.
b) Leveraging MetwareBio’s Extensive Plant Metabolite Database
The current limitation in plant metabolomics is the small number of available metabolite standards, especially for secondary metabolites. MetwareBio has built a comprehensive database of 35,000 compounds, including 2,200 primary metabolites (such as sugars, nucleotides, lipids, and amino acids) and 33,000 secondary metabolites (such as flavonoids, terpenoids, alkaloids, coumarins, and lignans). With expertise in 344 plant families, this database helps researchers uncover unique metabolic pathways and identify biologically significant compounds.
4. Real-World Case Studies: Specialized Metabolite Detection in Action
With experience from over 344 plant species, Metware Bio helps researchers uncover unique metabolic pathways and identify biologically important metabolites. Beyond detecting plant-specific compounds, we also deliver species-specific metabolites (e.g., solanine in tomatoes, glucosinolates in Arabidopsis), which add significant value to research by providing innovative insights.See how MetwareBio Supports Cutting-Edge Plant Research with Metabolite Profiling.
Case 1: Maize Metabolomics in Nature Communications
In March 2024, MetwareBio provided metabolite detection services for a study published in Nature Communications titled “An ARF Gene Mutation Creates Flint Kernel Architecture in Dent Maize.” (article resource) In this research, specialized metabolites accounted for 83.64% of the detected compounds, significantly contributing to understanding maize's environmental adaptation.
Plant-Specific Metabolites (Partial List) |
|
Chrysoeriol |
Chrysoeriol-7-O-rutinoside |
Chrysoeriol-5,7-di-O-glucoside |
Salcolin A |
Chrysoeriol-5-O-glucoside |
Salcolin B |
Chrysoeriol-7-O-(2''-O-glucuronyl)glucuronide |
tricin (5,7,4'-Trihydroxy-3',5'-dimethoxyflavone) |
Chrysoeriol-7-O-(6''-feruloyl)glucoside |
tricin-4'-O-(guaiacylglycerol)ether |
Chrysoeriol-7-O-(6''-malonyl)glucoside |
tricin-4'-O-(guaiacylglycerol)ether-7-O-glucoside |
Chrysoeriol-7-O-(6''-sinapoyl)glucoside |
tricin-4'-O-eudesmic acid |
Chrysoeriol-7-O-gentiobioside |
tricin-4'-O-glucoside-7-O-glucoside |
Chrysoeriol-7-O-glucoside |
tricin-5-O-Glucoside |
Case 2: Rhubarb Metabolomics in Plant Communications
In 2024, MetwareBio contributed to a study titled “The Haplotype-Resolved Genome Assembly of Autotetraploid Rhubarb Rheum Officinale Provides Insights into Its Genome Evolution and Massive Accumulation of Anthraquinones” (article resource) published in Plant Communications. The metabolite analysis revealed that specialized metabolites accounted for 100% of the detected compounds.
Plant-Specific Metabolites (Partial List) |
|
Rheic Acid |
Rhein-8-O-(6'-O-acetyl)glucoside |
Chrysophanol |
Chrysophanol-8-O-glucoside* |
Aloe emodin |
Physcion |
Aloeemodin-8-O-glucoside |
Torachrysone-8-O-(6''-acetyl)glucoside* |
Emodin-8-O-glucoside* |
6-Hydroxyrumicin-8-O-D-glucoside |
Rhein-8-O-glucoside |
Aloesone-7-O-β-D-glucoside |
Emodin-8-O-(6''-O-acetyl)glucoside |
Aloe emodin-1-O-glucoside |
2-Acetyl-emodin |
Rhein 1-O-(O-acetyl)-glucoside |
Laccaic acid D |
Aloesone |
Case 3: Rose Salt Tolerance in Horticultural Research
In another 2024 study, published in Horticultural Research, titled “Multi-Omics Analysis Reveals Key Regulatory Defense Pathways and Genes Involved in Salt Tolerance of Rose Plants,” (article resource) MetwareBio identified that specialized metabolites made up 75.55% of the detected compounds.
Plant-Specific Metabolites (Partial List) |
|
3,5,9-Trihydroxy-7,8-dihydrocyclopenta[g]chromene-2,6-dione |
23-Formyl-2,3,19-trihydroxyurs-12-en-28-oic acid |
3-Hydroxyurs-12,19-dien-28-oic acid |
2,3,19,23-Tetrahydroxyurs-12-en-28-oic acid |
3-Hydroxytaraxastan-28,20-olide |
Ziyuglycoside II |
19-Hydroxy-2-oxo-nor-A(3)-urs-12-en-28-oic acid |
Sanguiin H4 |
2,3-Dihydroxyurs-12,18-dien-28-oic acid |
3-O-Cafeoyltormentic acid |
2,19-Dihydroxy-3-oxoursa-1,12-dien-28-oic acid |
Rosamultin |
2,3,19-trihydroxyurs-12-en-28-oic acid |
3-O-Feruloyleuscaphic acid |
2,3,19,23,24-Pentahydroxyolean-12-en-28-oic acid-28-O-glucoside |
Sanguiin H11 |
Case 4: Tea Metabolomics in Food Chemistry X
In a comprehensive study published in Food Chemistry: X, titled “A Comprehensive Metabolomics Analysis of Volatile and Non-Volatile Compounds in Matcha Processed from Different Tea Varieties,” (article resource) MetwareBio’s metabolite detection revealed that specialized metabolites accounted for 82.26% of the total detected compounds.
Plant-Specific Metabolites (Partial List) |
|
catechin-4-β-D-galactopyranoside |
Theaflavin-3-gallate |
Epicatechin-3-(3''-O-methyl)gallate |
Theophylline |
Epigallocatechin-3-O-(3,5-O-dimethyl)gallate |
3'-O-Methyl-epicatechin |
Feruloylspermidine |
Caffeoylspermidine |
Gallocatechin-(4α→8)-catechin |
p-Coumaroylagmatine |
Gallocatechin-(4α→8)-gallocatechin |
Theaflavin-3,3'-di-O-gallate |
N-Feruloylhomoagmatine |
8,8'-Methylenebiscatechin |
N-Feruloylmethylagmatine |
Tercatain |
N-p-Coumaroyl-N'-feruloylputrescine |
Theaflagallin |
Procyanidin A6 |
|
Conclusion: The Importance of Plant Specialized Metabolites in Research
As demonstrated by the diversity of plant-specific compounds across different species and tissues, the detection of these metabolites provides valuable insights into how plants adapt to their environments. With MetwareBio’s advanced plant metabolomics approach and extensive database, researchers can delve deeper into plant metabolic pathways and identify compounds of significant biological and pharmacological interest.
References:
1.Huang XQ, Dudareva N. Plant specialized metabolism. Curr Biol. 2023 Jun 5;33(11):R473-R478.
2.Yasmin F, Cowie AE, Zerbe P. Understanding the chemical language mediating maize immunity and environmental adaptation. New Phytol. 2024 Sep;243(6):2093-2101.