CO2浓度倍增对红松幼苗根尖和叶解剖结构及生理功能的影响

王娜, 张韫, 钱文丽, 王政权, 谷加存

Effects of elevated CO2 concentration on root and needle anatomy and physiological functions in Pinus koraiensis seedlings

WANG Na,ZHANG Yun,QIAN Wen-Li,WANG Zheng-Quan,GU Jia-Cun

表1 不同CO2浓度处理对红松幼苗叶解剖结构的影响(平均值±标准误差)

Table 1 Effects of different CO2 concentration treatments on the needle anatomy of Pinus koraiensis seedlings (mean ± SE)

CO2浓度 CO2 concentration p 350 µmol·mol-1 700 µmol·mol-1 气孔密度 Stomatal density (No.·mm-2) 66.78 ± 1.85 56.83 ± 1.61 < 0.01 叶横截面积 Needle cross section area (mm2) 0.37 ± 0.02 0.44 ± 0.01 < 0.01 叶肉组织面积 Mesophyll tissue area (mm2) 0.26 ± 0.01 0.30 ± 0.01 < 0.05 叶肉细胞面积 Mesophyll cell area (µm2) 2 306.63 ± 69.97 2 501.67 ± 46.92 < 0.05 木质部面积 Xylem area (µm2) 3 817.96 ± 101.06 4 412.13 ± 126.86 < 0.01 韧皮部面积 Phloem area (µm2) 4 031.57 ± 152.95 5 534.15 ± 275.95 < 0.01 中柱直径 Central cylinder diameter (µm) 254.14 ± 8.31 277.55 ± 6.35 < 0.05 管胞数 Tracheid number (No.) 47.87 ± 1.85 50.60 ± 1.20 0.23 管胞直径 Tracheid diameter (µm) 6.53 ± 0.09 6.62 ± 0.14 0.62 管胞密度 Tracheid density (No.·µm-2) 0.001 ± 0.000 06 0.000 8 ± 0.000 05 < 0.05 管胞壁厚度 Tracheid wall thickness (µm) 0.68 ± 0.01 0.87 ± 0.02 < 0.01 表皮和下皮厚度 Epidermis plus hypodermis thickness (µm) 1.54 ± 0.03 1.67 ± 0.04 < 0.05