| 基质湿度对黄瓜嫁接苗叶片膜脂过氧化及保护酶活性的影响 |
| |
| 引用本文： | 乃小英,马凌之,陈年来.基质湿度对黄瓜嫁接苗叶片膜脂过氧化及保护酶活性的影响[J].甘肃农业大学学报,2009,44(1). |
| |
| 作者姓名： | 乃小英 马凌之 陈年来 |
| |
| 作者单位： | 甘肃农业大学农学院,甘肃,兰州,730070 |
| |
| 摘 要： | 以嫁接黄瓜幼苗为试材,在人工控制条件下,研究了基质湿度对黄瓜/黑籽南瓜嫁接苗和黄瓜自接苗叶片细胞质膜透性、丙二醛(MDA)含量及超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)和抗坏血酸过氧化物酶(APX)活性的影响.结果表明:黄瓜嫁接苗和自接苗的细胞膜相对透性和MDA含量随干旱胁迫时间延长和胁迫强度加大而增加;SOD、CAT、APX活性均随胁迫进程呈先升后降的趋势,而POD活性则持续下降;黄瓜嫁接苗的细胞膜相对透性和MDA含量始终小于自接苗,保护酶活性始终高于自接苗.2种种植方式间比较,黄瓜嫁接苗在间作中,除细胞膜透性和MDA含量外,其它酶活性均高于单作,而自接苗的变化趋势与嫁接苗相反,说明黄瓜嫁接苗的大根系对适度干旱胁迫具有较强的适应性,在土壤水分竞争中占有优势.
|
| 关 键 词： | 基质湿度 黄瓜 嫁接苗 MDA 保护酶 |
Effects of medium moisture on leaf lipid peroxidation and protective enzyme activities in grafted cucumber seedlings |
| |
| NAI Xiao-ying,MA Ling-zhi,CHEN Nian-lai.Effects of medium moisture on leaf lipid peroxidation and protective enzyme activities in grafted cucumber seedlings[J].Journal of Gansu Agricultural University,2009,44(1). |
| |
| Authors: | NAI Xiao-ying MA Ling-zhi CHEN Nian-lai |
| |
| Institution: | NAI Xiao-ying,MA Ling-zhi,CHEN Nian-lai(College of Agronomy,Gansu Agricultural University,Lanzhou 730070,China) |
| |
| Abstract: | The effects of medium moisture on leaf MDA content,membrane permeability,superoxide dismutase(SOD),peroxidase(POD),catalase(CAT) and ascorbate peroxidase(APX) activities in grafted seedlings(Cucurbita ficifolia as root stock)were investigated.The results showed that MDA content and membrane permeability of grafted cucumber seedlings increased as medium moisture reduced.The activity of SOD,POD,CAT and APX of grafted cucumber seedlings and self-grafted cucumber seedlings increased temporally and then decrease... |
| |
| Keywords: | MDA |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
