Fig. 6From: Variation, coordination, and trade-offs between needle structures and photosynthetic-related traits across five Picea species: consequences on plant growthComparison of growth traits among species. Height (6a), Height (9a) and Height (11a), tree height at age 6, 9, and 11, respectively; DBH, diameter at breast height. Different letters indicate significant differences among species (P < 0.05). *, statistical significance at P < 0.05; **, statistical significance at P < 0.01Back to article page