| 等渗NaCl和PEG胁迫对玉米幼苗伤害的比较 |
| |
| 引用本文： | 佟丽华,姚彩艳.等渗NaCl和PEG胁迫对玉米幼苗伤害的比较[J].安徽农业科学,2009,37(14):6393-6395. |
| |
| 作者姓名： | 佟丽华 姚彩艳 |
| |
| 作者单位： | 内蒙古通辽市土壤肥料工作站,内蒙古通辽,028000;内蒙古通辽市土壤肥料工作站,内蒙古通辽,028000 |
| |
| 摘 要： | 目的]研究NaCl和PEG等渗胁迫下玉米幼苗主要生理指标的变化情况。方法]用渗透势分别为-0.5、-0.6、-0.7、-0.8 Mpa的NaCl和PEG等渗溶液处理玉米幼苗，处理72 h后测定幼苗叶片的相对含水量、叶绿素含量、生物量、株高、叶片细胞电解质渗漏率等。结果]随NaCl和PEG浓度的增加，幼苗叶绿素含量先升高后降低，叶片相对含水量、叶绿素含量、生物量、株高、地上部和地下部K含量逐渐降低，叶片细胞电解质渗漏率逐渐增大；PEG处理的幼苗地上部Na^＋含量随PEG浓度的增加而增加，地下部Na^＋含量随PEG浓度的增加而降低；NaCl胁迫下，幼苗叶片相对含水量、叶绿素含量、生物量、株高均高于PEG胁迫。结论]玉米对NaCl和PEG胁迫是2个不同的响应过程。
|
| 关 键 词： | 玉米 NaCl PEG 生理指标 |
Comparison of Damage of Iso-osmotic Stress of NaCl and PEG on Maize Seedling |
| |
| Institution: | TONG Li-hua et al ( Tongliao Workstation of Soil and Fertilizer, Tongliao, Inner Mongolia 028000) |
| |
| Abstract: | Objective] The aim was to study the changes of main physiological indexes of maize seedling under iso-osmotic stress of NaCl and PEG.Method] The iso-osmotic stress of NaCl and PEG with osmotic potential of-0.5,-0.6,-0.7,-0.8 Mpa were taken to treat the maize seedlings,the relative water content in leaves,chlorophyll content,biomass,plant height and electrolyte leakage of leaf cells of seedlings were measured after 72 h of the treatment.Result] With the increase of NaCl and PEG concn.,the chlorophyll content firstly increased and then decreased,the relative water content in leaves,chlorophyll content,biomass,plant height and K content in above-ground part and under-ground part of maize seedlings were all decreased gradually,but the electrolyte leakage of leaf cells increased gradually.In treatment with PEG,the Na+ content in above-ground part of seedling was increased with the increase of PEG concn.,but that in under-ground part decreased.The relative water content of seedling leaves,chlorophyll content,biomass and plant height of seedlings under NaCl stress were all higher than those under PEG stress.Conclusion] The response of maize to NaCl and PEG stress were 2 different processes. |
| |
| Keywords: | Maize NaCl PEG Physiological indexes |
| 本文献已被 维普 万方数据 等数据库收录！ |
|
