干旱胁迫对西南野生马蹄金生理特性的影响  

Effects of drought stress on physiological characteristics of wild Dichondra repens in the Southwest China

作　　者：邵钰[1] 邱菊[1] 干友民[1] 张晓慧[1] 任婷[1] 

机构地区：[1]四川农业大学草业科学系,四川雅安625001

出　　处：《草业科学》2011年第6期1004-1008,共5页Pratacultural Science

基　　金：四川省科技厅应用基础研究专项基金(01SY05127)

摘　　要：以采集于四川和贵州的5份野生马蹄金(Dichondra repens)和1份美国引进的马蹄金为材料,采用盆栽控水试验研究土壤干旱胁迫下马蹄金生理指标的变化。结果表明,虽然不同材料间的变化存在差异,但随干旱胁迫时间的延长,各供试马蹄金材料的保水能力和叶绿素含量呈下降趋势,丙二醛和游离脯氨酸含量呈上升趋势。抗旱性强的材料表现出较高的叶片保水力、叶绿素含量以及较低的丙二醛、游离脯氨酸含量,且指标的升降幅度较小。Five wild Dichondra repens from Sichuan and Guizhou province and an introduced D.repens from USA were selected to determine the effects of drought stress on physiological characteristics of D.repens by a pot experiment.This study indicated that the increasing drought stress reduced the relative water content and chlorophyll content of leaves and increased the content of malondialdehye and free proline.The drought resistant materials showed a higher leaf water retention capacity,Chl content and a lower content of MDA,free proline.

关 键 词：马蹄金 干旱胁迫 抗旱性 生理特性 综合评价 

分 类 号：S688.4[农业科学—观赏园艺]