NaCl胁迫下黄瓜幼苗无机离子的渗透调节效应.PDF

河南农业科学 NaCl 1 1 2 1 1 周俊国, 扈惠灵 , 曾 凯, 赵润洲, 成 坤 ( 1. , 453003; 2. , 450002) : 以营养液栽培的津春2 号黄瓜幼苗为试验材料, 研究40mmol/ NaCl 胁迫下黄瓜幼苗无机 离子的渗透调 效应结果表明, 在NaCl 胁迫下, 黄瓜幼苗的生长受到抑制, 鲜质量和相对含水 - + + 量降低黄瓜幼苗各器官渗透势降低, Cl Na 含量上升, 但同时K 含量下降, 说明NaCl 胁迫后 - + + 黄瓜幼苗Cl Na 上升的同时起到了渗透调 离子毒害和致 K 缺乏的三重作用, 从而影响了幼 - + 苗的生长发育幼苗各器官中, 茎中的Cl Na 积累较多, 对维持叶片中较低的渗透势和较高的 + K 含量有积极的作用 : NaCl 胁迫; 黄瓜幼苗; 无机离子; 渗透调 : S6422 : A : 1004- 3268(2010) 02- 0079- 04 Study on Osmotic Adjustment on Inorganic Ions of Cucumber Seedling under NaCl Stress 1 1 2 1 1 ZHOU Junguo , HU Huiling , ZENG Kai , ZHAO Runzhou , CHENG Kun ( 1. School of Horticulture and andscape Architecture, H enan Institute of Science and Technology, Xinxiang 453003, China; 2.H enan Academy of Agricultural Sciences,Zhengzhou 450002, China) Abstract: Situation of osmotic adjustment on inorganic ions of Jinchun No. 2 cucumber seedling was studied in hydroponics into which added 40mmol/ NaCl. The growth of cucumber seedling was inhibited after 10 days under NaCl stress with fresh weight, relative water content reduced. - + + The osmotic potential was lowered, while the content of Cl and Na increased, and K content - + of every organ reduced. It suggested that the rise of Cl