# JXB Fig3 — 代谢物热图（GPT/Gemini通用Prompt）

A single-panel scientific figure, white background, vector style, Arial font.

**Title:** Metabolic reprogramming during the liquid-to-solid transition

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## 热图
**Type:** Heatmap. Rows = 12 compound classes. Columns = 2 phases: "Liquid" vs "Solid" (or "+" and "-" fold-change columns).

**Data table (12 compound classes, enrichment direction in each phase):**

| Compound class | Liquid phase | Solid phase |
|:--|:--:|:--:|
| Sugars | enriched | depleted |
| Amino acids | enriched | depleted |
| Nucleotides | enriched | depleted |
| Organic acids | enriched | depleted |
| Lipids | depleted | enriched |
| Cell wall components | depleted | enriched |
| Secondary metabolites | depleted | enriched |
| Fatty acids | depleted | enriched |
| Vitamins | no change | no change |
| Minerals | no change | no change |
| Flavonoids | enriched | depleted |
| Phenolic compounds | enriched | depleted |

**Color scheme:**
- Enriched: red/orange (#E74C3C)
- Depleted: blue (#2980B9)
- No change: gray (#95A5A6)
- White/light yellow for intermediate

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## Annotation
Add footnote:
"8 of 12 compound classes show opposite directional trends between liquid and solid phases (two-tailed binomial test, P = 0.194)"

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## Layout
- Include a color legend bar (red ↔ gray ↔ blue) labeled "Enrichment"
- Row labels on the left: compound class names (italic for biological terms)
- Column labels on top: "Liquid endosperm" / "Solid endosperm"
- Font ≥10pt, no gridlines, white background