# JXB Fig4 — 模型示意图（GPT/Gemini通用Prompt）

A conceptual model diagram, white background, vector style, Arial font, clean infographic style.

**Title:** Model of coconut endosperm solidification

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## 模型结构（从早到晚，从上到下）

**Top box:** "Liquid endosperm (early stage)"
- Icon: coconut with liquid inside
- Text: "High metabolic activity • Amino acids, sugars, nucleotides enriched"

**Arrow ↓** labeled "Transcriptional activation at mid-stage"

**Middle box:** "Transition phase (mid-stage)"
- Three stacked sub-bars showing the DEG gradient across cultivars:
  - CK (wild-type tall) → "11,247 DEGs — broad response"
  - W6 (intermediate dwarf) → "1,993 DEGs — intermediate"
  - W5 (domesticated dwarf) → "846 DEGs — streamlined"
- CSS-style color gradient from dark (CK) to light (W5)
- Key pathways listed: "Cell wall biogenesis • Starch metabolism • Hormone signaling"

**Split arrows** diverging:
- Left arrow ↓ "Master transition — all cultivars"
- Right arrow ↓ "Post-transcriptional layer — dwarf divergence"

**Bottom-left box:** "Solid endosperm (late stage)"
- Icon: solid coconut kernel
- Text: "Cell wall deposition • Lipid storage • Transcriptional quiescence"
- Checkmark: "CK continues (51%)" / "W5, W6 complete (0–0.2%)"

**Bottom-right box:** "Translational regulation"
- Text: "1.3× transcript–protein divergence between W5 and W6"
- Small icon: DNA → RNA → Protein with a magnifying glass on the RNA→Protein step

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## Bottom panel: "Metabolic reversal heatmap"
Mini heatmap strip showing 8/12 compound classes reversing direction from liquid to solid.
- Red (enriched in liquid) → Blue (enriched in solid) for sugars/amino acids/nucleotides
- Blue (depleted in liquid) → Red (enriched in solid) for lipids/cell wall/secondary metabolites

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## Style
- Clean flat-design icons (no photography)
- Arrows in gray (#7F8C8D), 2pt line
- Text boxes with light rounded borders, 10pt font
- All text ≥10pt
- No 3D effects, no shadows, no gridlines