高寒草原优势种紫花针茅叶片解剖结构对青藏高原高寒干旱环境适应性分析

吴建波, 王小丹

Analyzing leaf anatomical structure of dominant species Stipa purpurea adapting to alpine and drought environment at Qingzang Plateau

WU Jian-Bo, WANG Xiao-Dan

表2 青藏高原高寒草原不同地理种群紫花针茅叶片组织结构特征(平均值±标准误)

Table 2 Leaf characters of Stipa purpurea at different population at alpine steppe of Qingzang Plateau (mean ± SE)

	高寒草甸 Alpine meadow		高寒草原 Alpine steppe
	安多 Amdo	当雄 Damxung	五道梁 Wudaoliang	班戈 Baingoin	尼玛 Nyima	改则 Gêrzê	革吉 Gê’gyai	噶尔 Gar
角质层厚度 Cuticle thickness (μm)	4.75 ± 0.95	5.22 ± 0.46	5.85 ± 0.38	5.51 ± 0.74	4.36 ± 0.15	5.18 ± 0.40	4.99 ± 0.81	5.25 ± 0.62
外表皮厚度 Outer epidermal thickness (μm)	12.16 ± 2.31 ^a	8.93 ± 0.40 ^b	9.51 ± 0.34 ^b	7.63 ± 0.51 ^b	9.76 ± 1.53 ^b	7.36 ± 0.80 ^b	8.89 ± 0.59 ^b	8.08 ± 0.71 ^b
内表皮厚度 Inner epidermal thickness (μm)	18.82 ± 3.07 ^a	7.80 ± 0.45 ^b	6.95 ± 0.33 ^b	5.46 ± 0.33 ^b	6.35 ± 0.45 ^b	6.13 ± 0.58 ^b	7.83 ± 0.77 ^b	8.49 ± 1.00 ^b
厚角细胞厚度 Collenchymatous cell thickness (μm)	0	5.16 ± 0.82 ^b	4.92 ± 0.22 ^b	9.18 ± 2.12 ^a	13.32 ± 1.35 ^a	11.67 ± 1.72 ^a	10.66 ± 0.76 ^a	13.97 ± 0.78 ^a
气孔宽度 Stoma width (μm)	28.33 ± 8.82 ^a	12.42 ± 1.73 ^bc	10.06 ± 0.60 ^c	9.97 ± 1.22 ^c	12.35 ± 0.50 ^bc	13.55 ± 1.14 ^bc	15.37 ± 1.45 ^b	15.62 ± 1.05 ^b
叶片厚度 Leaf thickness (μm)	269.89 ± 19.67 ^a	179.12 ± 16.49 ^c	170.74 ± 2.60 ^c	173.46 ± 2.69 ^c	196.55 ± 11.10^bc	190.09 ± 19.18 ^bc	246.28 ± 31.81 ^b	212.33 ± 2.64 ^b
导管直径 Vessel diameter (μm)	16.04 ± 2.09 ^a	12.13 ± 1.13 ^b	9.73 ± 0.42 ^c	12.83 ± 1.36 ^b	11.82 ± 1.13 ^b	12.73 ± 1.34 ^b	21.15 ± 2.84 ^a	18.36 ± 2.23 ^a
主脉导管腔面积/主脉维管束面积 Catheter cavity area/area of main vascular bundle	0.11 ± 0.00 ^b	0.11 ± 0.01 ^b	0.07 ± 0.00 ^c	0.11 ± 0.02 ^b	0.11 ± 0.00 ^b	0.15 ± 0.02 ^a	0.16 ± 0.03 ^a	0.16 ± 0.02 ^a
维管束面积/叶横切面积Vascular area/leaf cross sectional area	0.04 ± 0.01 ^b	0.05 ± 0.01 ^b	0.07 ± 0.01 ^a	0.08 ± 0.01 ^a	0.07 ± 0.01 ^a	0.08 ± 0.01 ^a	0.08 ± 0.01 ^a	0.08 ± 0.01 ^a