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Fig. 1 | BMC Plant Biology

Fig. 1

From: Variation, coordination, and trade-offs between needle structures and photosynthetic-related traits across five Picea species: consequences on plant growth

Fig. 1

Correlation coefficients between needle structures. Histograms show trait distributions and correlations. NL, needle length; NW, needle width; NT, needle thickness; SD, stomatal density; NSA, needle section area; ETA, epidermis tissue fraction; MA and MF, mesophyll area and fraction; CCA and CCF, central cylinder area and fraction; TMA and TMF, total mechanical tissue area and fraction. *, statistical significance at P < 0.05; **, statistical significance at P < 0.01; ***, statistical significance at P < 0.001, ****, statistical significance at P < 0.0001

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