Agricultural Biotechnology Applications
Key Applications
| Application |
Product Category |
Example Products |
Sample Types |
| Plant stress physiology |
Plant biology assay kits |
Proline (BC0095), MDA (BC0025), H₂O₂ (BC3595), Chlorophyll (BC0990) |
Leaf, root, stem tissues |
| Molecular breeding |
PCR reagents, DNA extraction |
2×Taq MasterMix (PC1100), Plant DNA Extraction Kit (D1600) |
Leaf disc, seed, callus |
| Crop quality analysis |
Biochemical reagents |
Starch (BC0690), total protein (BC3180), reducing sugar (BC0230) |
Grain, fruit, tuber |
| Soil microbiome analysis |
DNA extraction kits |
Soil Genomic DNA Extraction Kit (D1600) |
Soil, rhizosphere, compost |
| Herbicide resistance screening |
PCR reagents |
High-efficiency PCR (PC1150) |
Leaf tissue |
| Transgenic analysis |
qPCR reagents |
SYBR Green qPCR Mix (SR1111) |
GM crop leaf/seed |
| Nutrient profiling |
Assay kits |
Nitrate (BC1715), Phosphate (BC2420), Potassium (BC2890) |
Soil, plant sap, fertilizer |
Key Assays for Plant Biology Research
Abiotic Stress Markers
| Parameter |
Assay SKU |
Principle |
Normal Range (Leaf) |
Stressed Range (Typical) |
| Proline |
BC0095 |
Acid-ninhydrin colorimetric |
0.1–1.0 µmol/g FW |
2–20 µmol/g FW |
| Malondialdehyde (MDA) |
BC0025 |
TBA reaction, 532/600 nm |
2–10 nmol/g FW |
15–60 nmol/g FW |
| H₂O₂ |
BC3595 |
Titanium sulfate colorimetric |
0.5–5 µmol/g FW |
10–50 µmol/g FW |
| Superoxide dismutase (SOD) |
BC0175 |
NBT reduction |
50–200 U/g FW |
150–500 U/g FW |
| Catalase (CAT) |
BC0205 |
H₂O₂ decomposition, 240 nm |
20–100 U/g FW |
50–300 U/g FW |
| Total chlorophyll |
BC0990 |
Ethanol extraction, 665/649 nm |
1–3 mg/g FW |
0.2–1.5 mg/g FW |
| Ascorbate peroxidase (APX) |
BC0220 |
Ascorbate oxidation, 290 nm |
0.5–3 U/g FW |
2–8 U/g FW |
| Glutathione reductase (GR) |
BC1180 |
NADPH oxidation, 340 nm |
0.1–0.8 U/g FW |
0.3–2.0 U/g FW |
Molecular Breeding Markers
| Marker Type |
PCR Method |
Typical Locus |
Amplicon Size |
Application |
| SSR (Simple Sequence Repeat) |
Standard PCR |
RM-series, X-series |
100–400 bp |
Genetic diversity, linkage mapping |
| SNP (Single Nucleotide Polymorphism) |
Allele-specific PCR |
Gene-specific |
50–300 bp |
Marker-assisted selection |
| InDel (Insertion-Deletion) |
Standard PCR |
Trait-linked |
50–500 bp |
Varietal identification |
| SCAR (Sequence-Characterized Amplified Region) |
Standard PCR |
Trait-linked |
200–1500 bp |
Gene tagging |
| CAPS (Cleaved Amplified Polymorphic Sequence) |
PCR + restriction digest |
Trait-linked |
300–1500 bp |
SNP detection (cost-effective) |
| KASP (Kompetitive Allele-Specific PCR) |
Endpoint fluorescence |
Trait-linked |
50–200 bp |
High-throughput genotyping |
| Tissue Type |
Recommended Method |
Yield (per 100 mg tissue) |
A₂₆₀/A₂₈₀ |
A₂₆₀/A₂₃₀ |
| Leaf (fresh, soft) |
Column-based (D1600) |
5–30 µg |
1.8–1.9 |
>1.7 |
| Leaf (dry, high polyphenol) |
CTAB + column |
3–15 µg |
1.7–1.9 |
>1.5 |
| Seed (dry) |
CTAB + column |
2–10 µg |
1.7–1.8 |
>1.5 |
| Root (fresh) |
Column-based (D1600) |
3–15 µg |
1.8–1.9 |
>1.7 |
| Callus |
Column-based (D1600) |
5–20 µg |
1.8–1.9 |
>1.7 |
| Soil microbiome |
Kit D1600 (soil protocol) |
1–5 µg/g soil |
1.6–1.8 |
>1.2 |
Expanded Stress Treatment Protocols
Heat Stress
| Step |
Detail |
| Plant growth |
3–4 weeks at 25°C (16 h light/8 h dark), 60–70% relative humidity |
| Treatment |
Transfer to growth chamber at 38–42°C for 2–6 h; maintain 70–80% RH |
| Sampling time |
0 (pre-stress), 30 min, 1 h, 2 h, 4 h, 6 h (acute); 0, 1, 3, 5, 7 days (chronic) |
| Recovery |
Return to 25°C; sample at 1, 6, 24 h post-recovery |
| Assays |
H₂O₂ (BC3595), MDA (BC0025), total chlorophyll (BC0990), HSP expression by RT-qPCR (SR1111) |
| Expected response |
H₂O₂ increases 3–8× within 1 h; chlorophyll declines >30% after 48 h in sensitive genotypes |
Cold Stress
| Step |
Detail |
| Plant growth |
3–4 weeks at 25°C |
| Treatment |
Transfer to 4–10°C; use gradual cooling (−5°C/h) to avoid cold shock |
| Sampling time |
0, 6, 24, 48, 72 h |
| Assays |
SOD (BC0175), CAT (BC0205), APX (BC0220), Proline (BC0095), MDA (BC0025) |
| Expected response |
Proline accumulates 5–20× in tolerant species; SOD increases 1.5–3× within 24 h |
Flooding / Waterlogging Stress
| Step |
Detail |
| Plant growth |
3–4 weeks in well-drained pots |
| Treatment |
Submerge pots in containers with water 3–5 cm above soil surface; maintain 25°C |
| Sampling time |
0, 1, 3, 5, 7, 14 days post-flooding |
| Assays |
ADH (alcohol dehydrogenase) activity (custom protocol), MDA (BC0025), chlorophyll (BC0990), soluble sugars (BC0230) |
| Expected response |
MDA increases 2–4× in sensitive species within 5 days; chlorophyll declines 20–60% |
| Step |
Detail |
| Plant growth |
2–3 weeks hydroponics or soil |
| Treatment |
CdCl₂ (50–200 µM), Pb(NO₃)₂ (100–500 µM), or CuSO₄ (50–200 µM) in nutrient solution |
| Sampling time |
0, 24, 48, 96 h (roots and shoots sampled separately) |
| Assays |
Metal content via AAS/ICP-MS (external), GSH (BC1175), PC (phytochelatin) via custom HPLC, POD (BC0090), CAT (BC0205) |
| Expected response |
GSH decreases 30–60% in sensitive species; POD increases 2–5× in root tissue |
Marker-Assisted Selection Workflow (Diagram Description)
The following describes the marker-assisted selection (MAS) process used in Solarbio-supported breeding programs:
Phase 1: Parental Screening
├── Extract DNA (D1600) from 50–100 parent plants
├── Screen with 50–200 SSR/SNP markers (PC1100)
└── Identify polymorphic markers differentiating parents
Phase 2: Population Development
├── Cross selected parents to produce F1
├── Self F1 to generate F2 population (500–2500 plants)
└── Extract DNA (D1600) from each F2 individual
Phase 3: Marker Genotyping
├── Multiplex PCR (PC1100) for up to 4 markers per reaction
├── Resolve on 3–4% agarose gel or capillary electrophoresis
└── Score markers per individual (co-dominant scoring for SSRs)
Phase 4: Data Analysis
├── Linkage map construction (JoinMap/QTL IciMapping)
├── QTL mapping (composite interval mapping)
└── Identify plants with target QTL genotypes
Phase 5: Selection Advancement
├── Select top 5–10% of plants (with target haplotypes)
├── Phenotypic confirmation in greenhouse
├── Advance selected lines to F₃/F₄ via selfing
└── Re-screen at each generation (foreground + background markers)
Time savings: MAS reduces variety development from 10–12 (conventional)
to 5–7 generations. Estimated cost: $3–8 per data point including DNA
extraction, PCR reagents, and gel electrophoresis.
qPCR-Based Transgene Copy Number Determination Protocol
Principle
Transgene copy number in GM crops is determined by relative qPCR using a single-copy endogenous reference gene for normalization. The 2^(−ΔΔCt) method yields transgene/host genome ratio.
Materials
| Item |
SKU |
| SYBR Green qPCR Master Mix |
SR1111 |
| Plant DNA Extraction Kit |
D1600 |
| Nuclease-free water |
R1000 |
Protocol
-
DNA preparation: Extract genomic DNA from 100 mg leaf tissue (D1600). Verify A₂₆₀/A₂₈₀ > 1.8 and A₂₆₀/A₂₃₀ > 1.5. Dilute to 10 ng/µL in nuclease-free water.
-
Primer design:
- Transgene-specific primers: Amplify unique region of transgene (e.g., NPTII, bar, or gene of interest). Amplicon 80–150 bp, Tm 60 ± 1°C.
-
Endogenous reference primers: Single-copy gene in host genome (e.g., Sucrose phosphate synthase for rice, Lectins for soybean, Adh1 for maize, UBC for Arabidopsis).
-
qPCR setup (20 µL reaction):
| Component |
Volume per Reaction |
| 2× SYBR Green qPCR Mix (SR1111) |
10 µL |
| Forward primer (10 µM) |
0.5 µL |
| Reverse primer (10 µM) |
0.5 µL |
| Template DNA (10 ng/µL) |
2 µL |
| Nuclease-free water |
7 µL |
| Total |
20 µL |
- Thermocycling conditions:
- 95°C for 3 min (initial denaturation)
- 40 cycles of: 95°C for 15 s, 60°C for 30 s (data collection)
-
Melt curve: 65–95°C at 0.5°C increments
-
Data analysis:
- Average Ct values from triplicate reactions
- ΔCt = Ct(transgene) − Ct(reference)
- Copy number = 2^(−ΔCt)
-
Example: ΔCt = −0.5 → 1.4 copies; ΔCt = −1.0 → 2.0 copies; ΔCt = −1.5 → 2.8 copies
-
Acceptance criteria:
- Melt curve single peak (Tm difference <1°C across replicates)
- Ct of no-template control > 35 or undetermined
- Reference gene Ct between 20–28 (10 ng template)
- ΔCt SD < 0.2 across technical triplicates
Step-by-Step Protocol
| Step |
Details |
| 1. Sample collection |
Collect 5 g soil from 0–15 cm depth; place in sterile 50 mL tube; transport on ice ≤24 h |
| 2. Sample processing |
Remove stones and roots; sieve to <2 mm; store 1 g aliquots at −80°C |
| 3. DNA extraction |
Use D1600 with soil-specific protocol: add 800 µL SLX buffer + 50 µL glass beads; bead-beat at 30 Hz for 90 s; incubate at 70°C for 15 min |
| 4. Purification |
Follow column purification per kit protocol; elute in 50 µL pre-warmed (70°C) elution buffer |
| 5. QC |
A₂₆₀/A₂₈₀ ratio 1.6–1.8; A₂₆₀/A₂₃₀ > 1.2; DNA integrity by 1% agarose gel (smear 10–50 kb expected) |
| 6. Library prep |
16S rRNA (V3-V4) or shotgun metagenomics library; use SR1111 for qPCR-based library quantification |
| 7. Sequencing |
Illumina NovaSeq/NEXTSeq; target 50,000–100,000 reads per 16S sample; 5–10 Gb for shotgun |
| 8. Analysis |
QIIME2 (16S), Kraken2/Bracken (shotgun); functional annotation via PICRUSt2/KEGG |
Expected DNA yields: Agricultural soil (loam) 2–12 µg/g; rhizosphere soil 3–15 µg/g; compost 5–25 µg/g; forest soil 1–5 µg/g.
Stress Response Data Tables
Realistic Stress Assay Data: Rice (Oryza sativa) under Salt Stress (100 mM NaCl, 72 h)
| Genotype |
Treatment |
Proline (µmol/g FW) |
MDA (nmol/g FW) |
SOD (U/g FW) |
CAT (U/g FW) |
Chlorophyll (mg/g FW) |
| IR64 (sensitive) |
Control |
0.3 ± 0.1 |
4.2 ± 0.8 |
85 ± 12 |
35 ± 5 |
2.5 ± 0.3 |
| IR64 (sensitive) |
Salt |
3.8 ± 0.6 |
28.4 ± 3.2 |
145 ± 18 |
58 ± 7 |
1.0 ± 0.2 |
| Pokkali (tolerant) |
Control |
0.5 ± 0.1 |
3.8 ± 0.6 |
95 ± 10 |
42 ± 6 |
2.7 ± 0.3 |
| Pokkali (tolerant) |
Salt |
12.7 ± 1.5 |
9.6 ± 1.2 |
268 ± 22 |
126 ± 14 |
2.3 ± 0.2 |
Wheat (Triticum aestivum) under Drought Stress (14 days water withholding)
| Cultivar |
Treatment |
Proline (µmol/g FW) |
H₂O₂ (µmol/g FW) |
APX (U/g FW) |
GR (U/g FW) |
RWC (%) |
| Chinese Spring |
Control |
0.6 ± 0.2 |
2.1 ± 0.4 |
1.2 ± 0.2 |
0.3 ± 0.1 |
92 ± 3 |
| Chinese Spring |
Drought |
8.5 ± 1.2 |
18.7 ± 2.5 |
4.8 ± 0.6 |
0.8 ± 0.2 |
48 ± 5 |
| Xiaoyan 81 (tolerant) |
Control |
0.8 ± 0.2 |
1.9 ± 0.3 |
1.4 ± 0.2 |
0.4 ± 0.1 |
94 ± 2 |
| Xiaoyan 81 (tolerant) |
Drought |
16.2 ± 1.8 |
8.3 ± 1.0 |
7.2 ± 0.8 |
1.8 ± 0.3 |
65 ± 4 |
| Genotype |
Treatment |
SOD (U/g FW) |
POD (BC0090, U/g FW) |
GSH (nmol/g FW) |
CAT (U/g FW) |
| B73 |
Control |
120 ± 15 |
280 ± 35 |
185 ± 22 |
55 ± 8 |
| B73 |
Cd |
310 ± 28 |
680 ± 55 |
95 ± 14 |
92 ± 12 |
| Mo17 (tolerant) |
Control |
105 ± 12 |
310 ± 28 |
210 ± 25 |
62 ± 7 |
| Mo17 (tolerant) |
Cd |
425 ± 35 |
920 ± 72 |
155 ± 18 |
145 ± 15 |
All values are mean ± SD, n = 5 biological replicates. All measurements performed using Solarbio assay kits per manufacturer protocol.
Genotyping Cost-Per-Sample Comparison
| Method |
Marker Throughput |
Cost per Sample (USD) |
Setup Cost |
Time per 96 Samples |
Suitable Solarbio Products |
| Agarose gel SSR |
1–4 markers per gel |
$1.20–2.50 |
Low |
4–6 h |
PC1100, D1600 |
| Capillary SSR |
6–12 markers per run |
$3.00–5.00 |
Medium |
3–5 h |
PC1100, D1600 |
| SNP allele-specific PCR |
1–2 markers per reaction |
$2.00–3.50 |
Low |
3–4 h |
PC1100, SR1111 |
| KASP genotyping |
1–2 markers per reaction |
$1.50–3.00 |
Medium |
2–3 h |
SR1111 + FRET reagents |
| TaqMan SNP (qPCR) |
1 marker per reaction |
$3.00–5.00 |
High |
1–2 h |
SR1110 |
| Genotyping-by-sequencing (GBS) |
10,000–100,000 markers |
$15–35 |
High |
7–14 days |
D1600 (DNA input only) |
| ddRAD-seq |
5,000–50,000 markers |
$20–50 |
High |
7–14 days |
D1600 (DNA input only) |
| Whole-genome sequencing (low-pass) |
Entire genome |
$50–150 |
Very high |
14–21 days |
D1600 (DNA input only) |
Cost estimates include DNA extraction, PCR reagents, electrophoresis/sequencing, and labor. Excludes primer/synthesis costs. Prices are indicative and based on 96-sample batches.
Cross-References
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