植物根部的拒Na^+作用与叶片Na^+含量的相关性分析  

SODIUM EXCLUSION OF THE ROOTS AND ITS CORRELATIVE ANALYSIS TO LEAF Na^+ CONTENT

作　　者：邱念伟[1] 杨洪兵[1] 丁顺华[1] 韩宁[1] 王宝山[1] 

机构地区：[1]山东师范大学逆境植物研究所,山东省济南市250014

出　　处：《曲阜师范大学学报（自然科学版）》2001年第1期65-68,共4页Journal of Qufu Normal University(Natural Science)

基　　金：山东省中青年科学家奖励基金!( 971114 0 2 );山东省自然科学基金!(Q99D11)

摘　　要：在 10 0mmol/LNaCl条件下 ,伽蓝菜、碱蓬、白刺、滨藜、沙枣等 5种不同类型植物根部木质部液中Na+ 浓度都低于外界培养液中Na+ 浓度 ,说明 5种植物根部都有一定的拒Na+ 作用 ;但是叶片Na+ 含量与根部的拒Na+ 作用并没有明显的相关性 ,而与植物的相对蒸腾速率和相对生长速率呈显著的正相关 .Nonhalophyte Kalancboe daigremotiana,salt_dilution halophyte halophyte Suaeda salsa, Nitraria sibiria,recretohalophyte Atriplex centralasiatica and salt_tolerant Elaeagnus angustifolia were treated with 100 mmol/L NaCl.The results indicated that Na + concentrations in xylem sap of roots(including stem_bases) of five species were all lower than 100 mmol/L,which indicated that roots of five spieces all possessed some sodium_exclusion ability.But leaf Na + content were not relative to sodium_exclusion of roots, while it was positively correlative to relative transpiration rate and relative growth rate. Relative transpiration rate and relative growth rate were also positively correlative.

关 键 词：拒Na^+作用 相对蒸腾速率 相对生长速率 叶片Na^+含量 相关性分析 根部 植物 

分 类 号：Q945[生物学—植物学]