盐胁迫对乐东拟单性木兰幼苗生长和生理特性的影响  

Effects of salt stress on seedling growth and physiological characteristics of Parakmeria Lotungensis(Chunet C. Tsoong)

作　　者：岑百花 李远发[2] 刘卫伟 陈瑜 吴国欣[2] 

机构地区：[1]柳州市大龙潭公园管理处,广西柳州545005 [2]广西大学林学院,南宁530005 [3]桂林市园林建设总公司,广西桂林541004

出　　处：《广西农业科学》2009年第5期486-489,共4页Guangxi Agricultural Sciences

摘　　要：以乐东拟单性木兰盆栽幼苗为试材,研究在不同浓度NaCl溶液处理下其生长、生理指标的变化。结果表明:在盐胁迫下,乐东拟单性木兰幼苗的生长受到明显抑制,苗高、地茎、叶绿素含量均随盐浓度增加而减少;叶片脯氨酸和可溶性糖含量均呈现先缓慢上升再下降的趋势。说明乐东拟单性木兰为盐敏感性植物,即使在低浓度盐分(0.1%～0.3%)下其生长也会受到抑制。Seedlings of Parakmeria lotungensis cultivated in pots were used as materials to study the changes of growth and physiological indexes under different concentrations of NaCl solution. The results showed that the growth of seedlings of Parakmeria lotungensis was inhibited under salt stress. The plant height, length of underground stem, and chlorophyll content in leaves were decreased with the increase of salt concentration, while the proline and soluble sugar contents in leaves were slowly increased at first, then slowly declined. These results indicated that Parakmeria lotungensis is a salt-sensitive plant, which growth would be inhibited even under low concentration salt （0.1%-0.3%）.

关 键 词：乐东拟单性木兰 盐胁迫 脯氨酸 叶绿素 可溶性糖 

分 类 号：S685.150.1[农业科学—观赏园艺]