Na_2SO_4胁迫下狗牙根K^+、Na^+离子分布及其抗盐性的评价  

Distribution of K^+ and Na^+ in Bermudagrass under Na_2SO_4 Stress and Evaluation of Salt Resistance.

作　　者：王红玲[1] 阿不来提.阿不都热依木 齐曼[2] 

机构地区：[1]中国科学院新疆生态与地理研究所吐鲁番沙漠植物园,新疆吐鲁番838000 [2]新疆农业大学,新疆乌鲁木齐830052

出　　处：《中国草地》2004年第5期37-42,共6页Grassland of China

基　　金：新疆维吾尔自治区"九五"重要课题(980101009);科技部农业科技成果转化资金项目(03EFN216500249)资助

摘　　要：通过对盆栽狗牙根(新农一号狗牙根)、喀什狗牙根、C-3(狗牙根品系)、矮生天堂草以0、0.4%、0.8%、1.2%、1.6%五个土壤盐浓度进行处理,对其K+、Na+离子变化情况做了研究。结果表明:相同盐浓度水平下,狗牙根体内K+、Na+离子含量茎叶大于根系,茎叶是K+、Na+离子累积的主要部位;K+/Na+比茎叶大于根系,说明茎叶耐钠性大于根系;随着盐度水平的递增,新农一号狗牙根、喀什狗牙根、C-3狗牙根K+、Na+离子吸收选择性系数增大,新农一号狗牙根>喀什狗牙根>C-3>矮生天堂草。由此初步认为,狗牙根抗盐性从大到小依次为新农一号狗牙根>喀什狗牙根>C-3狗牙根>矮生天堂草。K^+ and Na^+ content in Xinnong No.1 Bermudagrass,Kashi Bermudagrass,C-3(one of lines of bermudagrass)and Tifdwarf and Common Bermudagrass subjected to different soil salinity conditions with 0, 0.4%, 0.8%,1.2% and1.6% was studied.Results shown:at the same concentration, K^+ and Na^+ content in stem and leaf was higher than that in root, so stem and leaf was the main site of K^+ and Na^+ accumulation; K^+/Na^+ ratio of stem and leaf was higher than that of root, so former had better Na^+-tolerance than latter. With the salt concentration increasing, SK,Na(uptake) of Xinnong No.1 Bermudagrass, Kashi Bermudagrass, C-3 increased, and the order was Xinnong No.1 Bermudagrass>Kashi Bermudagrass>C-3>Tifdwarf and Common Bermudagrass. According to these,the preliminary order of salt resistance was Xinnong No.1 Bermudagrass>Kashi Bermudagrass>C-3> Tifdwarf and Common Bermudagrass.

关 键 词：新农一号狗牙根 喀什狗牙根 盐胁迫 抗盐性 

分 类 号：Q948.113[生物学—植物学]