罗汉松科3种植物茎和根木质部水分运输、解剖结构与机械强度之间的关系

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陆世通¹^,², 陈森¹^,², 李彦¹^,²^,³, 王忠媛¹, 潘天天¹^,², 叶琳峰¹^,², 谢江波¹^,²^,³^,^*(

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Relationships among xylem transport, anatomical structure and mechanical strength in stems and roots of three Podocarpaceae species

LU Shi-Tong¹^,², CHEN Sen¹^,², LI Yan¹^,²^,³, WANG Zhong-Yuan¹, PAN Tian-Tian¹^,², YE Lin-Feng¹^,², XIE Jiang-Bo¹^,²^,³^,^*(

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图6. 罗汉松科植物10个木质部性状之间的相关性分析。A, 茎木质部性状。B, 根木质部性状。*, p ≤ 0.05; **, p ≤ 0.01。D_h, 水力直径(μm); D_p, 纹孔膜直径(μm); D_t, 管胞直径(μm); K_s, 最大比导率(kg·m^-1·MPa^-1·s^-1); N_p, 纹孔密度(mm^-2); N_t, 管胞密度(mm^-2); P₅₀, 导水率损失50%时的水势(-MPa); T_w, 管胞厚度(μm); WD, 木质部密度(g·cm^-2); (t/b)², 管胞厚度跨度比。

Fig. 6. Correlation analysis of ten xylem traits in Podocarpaceae species. A, Xylem traits of stem. B, Xylem traits of root. *, p ≤ 0.05; **, p ≤ 0.01. D_h, hydraulic diameter (μm); D_p, pit membrane diameter (μm); D_t, tracheid diameter (μm); K_s, specific hydraulic conductivity (kg·m^-1·MPa^-1·s^-1); N_p, pit density (mm^-2); N_t, tracheid density (mm²); P₅₀, the xylem water potential causing 50% loss of hydraulic conductivity (-MPa); T_w, tracheid wall thickness (μm); WD, wood density (g·cm^-2); (t/b)², tracheid thickness to span ratio.